Kyuubi provides several ways to configure the system and corresponding engines.

Environments

You can configure the environment variables in $KYUUBI_HOME/conf/kyuubi-env.sh, e.g, JAVA_HOME, then this java runtime will be used both for Kyuubi server instance and the applications it launches. You can also change the variable in the subprocess’s env configuration file, e.g.$SPARK_HOME/conf/spark-env.sh to use more specific ENV for SQL engine applications. see $KYUUBI_HOME/conf/kyuubi-env.sh.template as an example. For the environment variables that only needed to be transferred into engine side, you can set it with a Kyuubi configuration item formatted kyuubi.engineEnv.VAR_NAME. For example, with kyuubi.engineEnv.SPARK_DRIVER_MEMORY=4g, the environment variable SPARK_DRIVER_MEMORY with value 4g would be transferred into engine side. With kyuubi.engineEnv.SPARK_CONF_DIR=/apache/confs/spark/conf, the value of SPARK_CONF_DIR on the engine side is set to /apache/confs/spark/conf.

Kyuubi Configurations

You can configure the Kyuubi properties in $KYUUBI_HOME/conf/kyuubi-defaults.conf, see $KYUUBI_HOME/conf/kyuubi-defaults.conf.template as an example.

Authentication

Key Default Meaning Type Since
kyuubi.authentication NONE A comma-separated list of client authentication types.
  • NOSASL: raw transport.
  • NONE: no authentication check.
  • KERBEROS: Kerberos/GSSAPI authentication.
  • CUSTOM: User-defined authentication.
  • JDBC: JDBC query authentication.
  • LDAP: Lightweight Directory Access Protocol authentication.
The following tree describes the catalog of each option.
  • NOSASL
  • SASL
    • SASL/PLAIN
      • NONE
      • LDAP
      • JDBC
      • CUSTOM
    • SASL/GSSAPI
      • KERBEROS
Note that: for SASL authentication, KERBEROS and PLAIN auth types are supported at the same time, and only the first specified PLAIN auth type is valid.		 seq 1.0.0
kyuubi.authentication.custom.class <undefined> User-defined authentication implementation of org.apache.kyuubi.service.authentication.PasswdAuthenticationProvider string 1.3.0
kyuubi.authentication.jdbc.driver.class <undefined> Driver class name for JDBC Authentication Provider. string 1.6.0
kyuubi.authentication.jdbc.password <undefined> Database password for JDBC Authentication Provider. string 1.6.0
kyuubi.authentication.jdbc.query <undefined> Query SQL template with placeholders for JDBC Authentication Provider to execute. Authentication passes if the result set is not empty.The SQL statement must start with the SELECT clause. Available placeholders are ${user} and ${password}. string 1.6.0
kyuubi.authentication.jdbc.url <undefined> JDBC URL for JDBC Authentication Provider. string 1.6.0
kyuubi.authentication.jdbc.user <undefined> Database user for JDBC Authentication Provider. string 1.6.0
kyuubi.authentication.ldap.baseDN <undefined> LDAP base DN. string 1.7.0
kyuubi.authentication.ldap.binddn <undefined> The user with which to bind to the LDAP server, and search for the full domain name of the user being authenticated. This should be the full domain name of the user, and should have search access across all users in the LDAP tree. If not specified, then the user being authenticated will be used as the bind user. For example: CN=bindUser,CN=Users,DC=subdomain,DC=domain,DC=com string 1.7.0
kyuubi.authentication.ldap.bindpw <undefined> The password for the bind user, to be used to search for the full name of the user being authenticated. If the username is specified, this parameter must also be specified. string 1.7.0
kyuubi.authentication.ldap.customLDAPQuery <undefined> A full LDAP query that LDAP Atn provider uses to execute against LDAP Server. If this query returns a null resultset, the LDAP Provider fails the Authentication request, succeeds if the user is part of the resultset.For example: (&(objectClass=group)(objectClass=top)(instanceType=4)(cn=Domain*)), `(&(objectClass=person)( (sAMAccountName=admin)( (memberOf=CN=Domain Admins,CN=Users,DC=domain,DC=com)(memberOf=CN=Administrators,CN=Builtin,DC=domain,DC=com))))` string 1.7.0
kyuubi.authentication.ldap.domain <undefined> LDAP domain. string 1.0.0
kyuubi.authentication.ldap.groupClassKey groupOfNames LDAP attribute name on the group entry that is to be used in LDAP group searches. For example: group, groupOfNames or groupOfUniqueNames. string 1.7.0
kyuubi.authentication.ldap.groupDNPattern <undefined> COLON-separated list of patterns to use to find DNs for group entities in this directory. Use %s where the actual group name is to be substituted for. For example: CN=%s,CN=Groups,DC=subdomain,DC=domain,DC=com. string 1.7.0
kyuubi.authentication.ldap.groupFilter COMMA-separated list of LDAP Group names (short name not full DNs). For example: HiveAdmins,HadoopAdmins,Administrators set 1.7.0
kyuubi.authentication.ldap.groupMembershipKey member LDAP attribute name on the group object that contains the list of distinguished names for the user, group, and contact objects that are members of the group. For example: member, uniqueMember or memberUid string 1.7.0
kyuubi.authentication.ldap.guidKey uid LDAP attribute name whose values are unique in this LDAP server. For example: uid or CN. string 1.2.0
kyuubi.authentication.ldap.url <undefined> SPACE character separated LDAP connection URL(s). string 1.0.0
kyuubi.authentication.ldap.userDNPattern <undefined> COLON-separated list of patterns to use to find DNs for users in this directory. Use %s where the actual group name is to be substituted for. For example: CN=%s,CN=Users,DC=subdomain,DC=domain,DC=com. string 1.7.0
kyuubi.authentication.ldap.userFilter COMMA-separated list of LDAP usernames (just short names, not full DNs). For example: hiveuser,impalauser,hiveadmin,hadoopadmin set 1.7.0
kyuubi.authentication.ldap.userMembershipKey <undefined> LDAP attribute name on the user object that contains groups of which the user is a direct member, except for the primary group, which is represented by the primaryGroupId. For example: memberOf string 1.7.0
kyuubi.authentication.sasl.qop auth Sasl QOP enable higher levels of protection for Kyuubi communication with clients.
  • auth - authentication only (default)
  • auth-int - authentication plus integrity protection
  • auth-conf - authentication plus integrity and confidentiality protection. This is applicable only if Kyuubi is configured to use Kerberos authentication.
 string 1.0.0

Backend

Key Default Meaning Type Since
kyuubi.backend.engine.exec.pool.keepalive.time PT1M Time(ms) that an idle async thread of the operation execution thread pool will wait for a new task to arrive before terminating in SQL engine applications duration 1.0.0
kyuubi.backend.engine.exec.pool.shutdown.timeout PT10S Timeout(ms) for the operation execution thread pool to terminate in SQL engine applications duration 1.0.0
kyuubi.backend.engine.exec.pool.size 100 Number of threads in the operation execution thread pool of SQL engine applications int 1.0.0
kyuubi.backend.engine.exec.pool.wait.queue.size 100 Size of the wait queue for the operation execution thread pool in SQL engine applications int 1.0.0
kyuubi.backend.server.event.json.log.path file:///tmp/kyuubi/events The location of server events go for the built-in JSON logger string 1.4.0
kyuubi.backend.server.event.kafka.close.timeout PT5S Period to wait for Kafka producer of server event handlers to close. duration 1.8.0
kyuubi.backend.server.event.kafka.topic <undefined> The topic of server events go for the built-in Kafka logger string 1.8.0
kyuubi.backend.server.event.loggers A comma-separated list of server history loggers, where session/operation etc events go.
  • JSON: the events will be written to the location of kyuubi.backend.server.event.json.log.path
  • KAFKA: the events will be serialized in JSON format and sent to topic of kyuubi.backend.server.event.kafka.topic. Note: For the configs of Kafka producer, please specify them with the prefix: kyuubi.backend.server.event.kafka.. For example, kyuubi.backend.server.event.kafka.bootstrap.servers=127.0.0.1:9092
  • JDBC: to be done
  • CUSTOM: User-defined event handlers.
Note that: Kyuubi supports custom event handlers with the Java SPI. To register a custom event handler, the user needs to implement a class which is a child of org.apache.kyuubi.events.handler.CustomEventHandlerProvider which has a zero-arg constructor.		 seq 1.4.0
kyuubi.backend.server.exec.pool.keepalive.time PT1M Time(ms) that an idle async thread of the operation execution thread pool will wait for a new task to arrive before terminating in Kyuubi server duration 1.0.0
kyuubi.backend.server.exec.pool.shutdown.timeout PT10S Timeout(ms) for the operation execution thread pool to terminate in Kyuubi server duration 1.0.0
kyuubi.backend.server.exec.pool.size 100 Number of threads in the operation execution thread pool of Kyuubi server int 1.0.0
kyuubi.backend.server.exec.pool.wait.queue.size 100 Size of the wait queue for the operation execution thread pool of Kyuubi server int 1.0.0

Batch

Key Default Meaning Type Since
kyuubi.batch.application.check.interval PT5S The interval to check batch job application information. duration 1.6.0
kyuubi.batch.application.starvation.timeout PT3M Threshold above which to warn batch application may be starved. duration 1.7.0
kyuubi.batch.conf.ignore.list A comma-separated list of ignored keys for batch conf. If the batch conf contains any of them, the key and the corresponding value will be removed silently during batch job submission. Note that this rule is for server-side protection defined via administrators to prevent some essential configs from tampering. You can also pre-define some config for batch job submission with the prefix: kyuubi.batchConf.[batchType]. For example, you can pre-define spark.master for the Spark batch job with key kyuubi.batchConf.spark.spark.master. set 1.6.0
kyuubi.batch.session.idle.timeout PT6H Batch session idle timeout, it will be closed when it’s not accessed for this duration duration 1.6.2

Credentials

Key Default Meaning Type Since
kyuubi.credentials.check.interval PT5M The interval to check the expiration of cached pairs. duration 1.6.0
kyuubi.credentials.hadoopfs.enabled true Whether to renew Hadoop filesystem delegation tokens boolean 1.4.0
kyuubi.credentials.hadoopfs.uris Extra Hadoop filesystem URIs for which to request delegation tokens. The filesystem that hosts fs.defaultFS does not need to be listed here. seq 1.4.0
kyuubi.credentials.hive.enabled true Whether to renew Hive metastore delegation token boolean 1.4.0
kyuubi.credentials.idle.timeout PT6H The inactive users’ credentials will be expired after a configured timeout duration 1.6.0
kyuubi.credentials.renewal.interval PT1H How often Kyuubi renews one user’s delegation tokens duration 1.4.0
kyuubi.credentials.renewal.retry.wait PT1M How long to wait before retrying to fetch new credentials after a failure. duration 1.4.0
kyuubi.credentials.update.wait.timeout PT1M How long to wait until the credentials are ready. duration 1.5.0

Ctl

Key Default Meaning Type Since
kyuubi.ctl.batch.log.on.failure.timeout PT10S The timeout for fetching remaining batch logs if the batch failed. duration 1.6.1
kyuubi.ctl.batch.log.query.interval PT3S The interval for fetching batch logs. duration 1.6.0
kyuubi.ctl.rest.auth.schema basic The authentication schema. Valid values are: basic, spnego. string 1.6.0
kyuubi.ctl.rest.base.url <undefined> The REST API base URL, which contains the scheme (http:// or https://), hostname, port number string 1.6.0
kyuubi.ctl.rest.connect.timeout PT30S The timeout[ms] for establishing the connection with the kyuubi server. A timeout value of zero is interpreted as an infinite timeout. duration 1.6.0
kyuubi.ctl.rest.request.attempt.wait PT3S How long to wait between attempts of ctl rest request. duration 1.6.0
kyuubi.ctl.rest.request.max.attempts 3 The max attempts number for ctl rest request. int 1.6.0
kyuubi.ctl.rest.socket.timeout PT2M The timeout[ms] for waiting for data packets after connection is established. A timeout value of zero is interpreted as an infinite timeout. duration 1.6.0
kyuubi.ctl.rest.spnego.host <undefined> When auth schema is spnego, need to config spnego host. string 1.6.0

Delegation

Key Default Meaning Type Since
kyuubi.delegation.key.update.interval PT24H unused yet duration 1.0.0
kyuubi.delegation.token.gc.interval PT1H unused yet duration 1.0.0
kyuubi.delegation.token.max.lifetime PT168H unused yet duration 1.0.0
kyuubi.delegation.token.renew.interval PT168H unused yet duration 1.0.0

Engine

Key Default Meaning Type Since
kyuubi.engine.chat.ernie.http.connect.timeout PT2M The timeout[ms] for establishing the connection with the ernie bot server. A timeout value of zero is interpreted as an infinite timeout. duration 1.9.0
kyuubi.engine.chat.ernie.http.proxy <undefined> HTTP proxy url for API calling in ernie bot engine. e.g. http://127.0.0.1:1088 string 1.9.0
kyuubi.engine.chat.ernie.http.socket.timeout PT2M The timeout[ms] for waiting for data packets after ernie bot server connection is established. A timeout value of zero is interpreted as an infinite timeout. duration 1.9.0
kyuubi.engine.chat.ernie.model completions ID of the model used in ernie bot. Available models are completions_pro, ernie_bot_8k, completions and eb-instantModel overview. string 1.9.0
kyuubi.engine.chat.ernie.token <undefined> The token to access ernie bot open API, which could be got at https://cloud.baidu.com/doc/WENXINWORKSHOP/s/Ilkkrb0i5 string 1.9.0
kyuubi.engine.chat.extra.classpath <undefined> The extra classpath for the Chat engine, for configuring the location of the SDK and etc. string 1.8.0
kyuubi.engine.chat.gpt.apiKey <undefined> The key to access OpenAI open API, which could be got at https://platform.openai.com/account/api-keys string 1.8.0
kyuubi.engine.chat.gpt.http.connect.timeout PT2M The timeout[ms] for establishing the connection with the Chat GPT server. A timeout value of zero is interpreted as an infinite timeout. duration 1.8.0
kyuubi.engine.chat.gpt.http.proxy <undefined> HTTP proxy url for API calling in Chat GPT engine. e.g. http://127.0.0.1:1087 string 1.8.0
kyuubi.engine.chat.gpt.http.socket.timeout PT2M The timeout[ms] for waiting for data packets after Chat GPT server connection is established. A timeout value of zero is interpreted as an infinite timeout. duration 1.8.0
kyuubi.engine.chat.gpt.model gpt-3.5-turbo ID of the model used in ChatGPT. Available models refer to OpenAI’s Model overview. string 1.8.0
kyuubi.engine.chat.java.options <undefined> The extra Java options for the Chat engine string 1.8.0
kyuubi.engine.chat.memory 1g The heap memory for the Chat engine string 1.8.0
kyuubi.engine.chat.provider ECHO The provider for the Chat engine. Candidates:
  • ECHO: simply replies a welcome message.
  • GPT: a.k.a ChatGPT, powered by OpenAI.
  • ERNIE: ErnieBot, powered by Baidu.
 string 1.8.0
kyuubi.engine.connection.url.use.hostname true (deprecated) When true, the engine registers with hostname to zookeeper. When Spark runs on K8s with cluster mode, set to false to ensure that server can connect to engine boolean 1.3.0
kyuubi.engine.deregister.exception.classes A comma-separated list of exception classes. If there is any exception thrown, whose class matches the specified classes, the engine would deregister itself. set 1.2.0
kyuubi.engine.deregister.exception.messages A comma-separated list of exception messages. If there is any exception thrown, whose message or stacktrace matches the specified message list, the engine would deregister itself. set 1.2.0
kyuubi.engine.deregister.exception.ttl PT30M Time to live(TTL) for exceptions pattern specified in kyuubi.engine.deregister.exception.classes and kyuubi.engine.deregister.exception.messages to deregister engines. Once the total error count hits the kyuubi.engine.deregister.job.max.failures within the TTL, an engine will deregister itself and wait for self-terminated. Otherwise, we suppose that the engine has recovered from temporary failures. duration 1.2.0
kyuubi.engine.deregister.job.max.failures 4 Number of failures of job before deregistering the engine. int 1.2.0
kyuubi.engine.doAs.enabled true Whether to enable user impersonation on launching engine. When enabled, for engines which supports user impersonation, e.g. SPARK, depends on the kyuubi.engine.share.level, different users will be used to launch the engine. Otherwise, Kyuubi Server’s user will always be used to launch the engine. boolean 1.9.0
kyuubi.engine.event.json.log.path file:///tmp/kyuubi/events The location where all the engine events go for the built-in JSON logger.
  • Local Path: start with ‘file://‘
  • HDFS Path: start with ‘hdfs://‘
 string 1.3.0
kyuubi.engine.event.loggers SPARK A comma-separated list of engine history loggers, where engine/session/operation etc events go.
  • SPARK: the events will be written to the Spark listener bus.
  • JSON: the events will be written to the location of kyuubi.engine.event.json.log.path
  • JDBC: to be done
  • CUSTOM: User-defined event handlers.
Note that: Kyuubi supports custom event handlers with the Java SPI. To register a custom event handler, the user needs to implement a subclass of org.apache.kyuubi.events.handler.CustomEventHandlerProvider which has a zero-arg constructor.		 seq 1.3.0
kyuubi.engine.flink.application.jars <undefined> A comma-separated list of the local jars to be shipped with the job to the cluster. For example, SQL UDF jars. Only effective in yarn application mode. string 1.8.0
kyuubi.engine.flink.extra.classpath <undefined> The extra classpath for the Flink SQL engine, for configuring the location of hadoop client jars, etc. Only effective in yarn session mode. string 1.6.0
kyuubi.engine.flink.initialize.sql SHOW DATABASES The initialize sql for Flink engine. It fallback to kyuubi.engine.initialize.sql. seq 1.8.1
kyuubi.engine.flink.java.options <undefined> The extra Java options for the Flink SQL engine. Only effective in yarn session mode. string 1.6.0
kyuubi.engine.flink.memory 1g The heap memory for the Flink SQL engine. Only effective in yarn session mode. string 1.6.0
kyuubi.engine.hive.deploy.mode LOCAL Configures the hive engine deploy mode, The value can be ‘local’, ‘yarn’. In local mode, the engine operates on the same node as the KyuubiServer. In YARN mode, the engine runs within the Application Master (AM) container of YARN. string 1.9.0
kyuubi.engine.hive.event.loggers JSON A comma-separated list of engine history loggers, where engine/session/operation etc events go.
  • JSON: the events will be written to the location of kyuubi.engine.event.json.log.path
  • JDBC: to be done
  • CUSTOM: to be done.
 seq 1.7.0
kyuubi.engine.hive.extra.classpath <undefined> The extra classpath for the Hive query engine, for configuring location of the hadoop client jars and etc. string 1.6.0
kyuubi.engine.hive.java.options <undefined> The extra Java options for the Hive query engine string 1.6.0
kyuubi.engine.hive.memory 1g The heap memory for the Hive query engine string 1.6.0
kyuubi.engine.initialize.sql SHOW DATABASES SemiColon-separated list of SQL statements to be initialized in the newly created engine before queries. i.e. use SHOW DATABASES to eagerly active HiveClient. This configuration can not be used in JDBC url due to the limitation of Beeline/JDBC driver. seq 1.2.0
kyuubi.engine.jdbc.connection.password <undefined> The password is used for connecting to server string 1.6.0
kyuubi.engine.jdbc.connection.propagateCredential false Whether to use the session’s user and password to connect to database boolean 1.8.0
kyuubi.engine.jdbc.connection.properties The additional properties are used for connecting to server seq 1.6.0
kyuubi.engine.jdbc.connection.provider <undefined> A JDBC connection provider plugin for the Kyuubi Server to establish a connection to the JDBC URL. The configuration value should be a subclass of org.apache.kyuubi.engine.jdbc.connection.JdbcConnectionProvider. Kyuubi provides the following built-in implementations:
  • doris: For establishing Doris connections.
  • mysql: For establishing MySQL connections.
  • phoenix: For establishing Phoenix connections.
  • postgresql: For establishing PostgreSQL connections.
  • starrocks: For establishing StarRocks connections.
  • impala: For establishing Impala connections.
    		•  string 1.6.0
    kyuubi.engine.jdbc.connection.url <undefined> The server url that engine will connect to string 1.6.0
    kyuubi.engine.jdbc.connection.user <undefined> The user is used for connecting to server string 1.6.0
    kyuubi.engine.jdbc.driver.class <undefined> The driver class for JDBC engine connection string 1.6.0
    kyuubi.engine.jdbc.extra.classpath <undefined> The extra classpath for the JDBC query engine, for configuring the location of the JDBC driver and etc. string 1.6.0
    kyuubi.engine.jdbc.fetch.size 1000 The fetch size of JDBC engine int 1.9.0
    kyuubi.engine.jdbc.initialize.sql SELECT 1 SemiColon-separated list of SQL statements to be initialized in the newly created engine before queries. i.e. use SELECT 1 to eagerly active JDBCClient. seq 1.8.0
    kyuubi.engine.jdbc.java.options <undefined> The extra Java options for the JDBC query engine string 1.6.0
    kyuubi.engine.jdbc.memory 1g The heap memory for the JDBC query engine string 1.6.0
    kyuubi.engine.jdbc.session.initialize.sql SemiColon-separated list of SQL statements to be initialized in the newly created engine session before queries. seq 1.8.0
    kyuubi.engine.jdbc.type <undefined> The short name of JDBC type string 1.6.0
    kyuubi.engine.kubernetes.submit.timeout PT30S The engine submit timeout for Kubernetes application. duration 1.7.2
    kyuubi.engine.operation.convert.catalog.database.enabled true When set to true, The engine converts the JDBC methods of set/get Catalog and set/get Schema to the implementation of different engines boolean 1.6.0
    kyuubi.engine.operation.log.dir.root engine_operation_logs Root directory for query operation log at engine-side. string 1.4.0
    kyuubi.engine.pool.name engine-pool The name of the engine pool. string 1.5.0
    kyuubi.engine.pool.selectPolicy RANDOM The select policy of an engine from the corresponding engine pool engine for a session.
    • RANDOM - Randomly use the engine in the pool
    • POLLING - Polling use the engine in the pool
    		 string 1.7.0
    kyuubi.engine.pool.size -1 The size of the engine pool. Note that, if the size is less than 1, the engine pool will not be enabled; otherwise, the size of the engine pool will be min(this, kyuubi.engine.pool.size.threshold). int 1.4.0
    kyuubi.engine.pool.size.threshold 9 This parameter is introduced as a server-side parameter controlling the upper limit of the engine pool. int 1.4.0
    kyuubi.engine.session.initialize.sql SemiColon-separated list of SQL statements to be initialized in the newly created engine session before queries. This configuration can not be used in JDBC url due to the limitation of Beeline/JDBC driver. seq 1.3.0
    kyuubi.engine.share.level USER Engines will be shared in different levels, available configs are:
    • CONNECTION: the engine will not be shared but only used by the current client connection, and the engine will be launched by session user.
    • USER: the engine will be shared by all sessions created by a unique username, and the engine will be launched by session user.
    • GROUP: the engine will be shared by all sessions created by all users belong to the same primary group name. The engine will be launched by the primary group name as the effective username, so here the group name is in value of special user who is able to visit the computing resources/data of the team. It follows the Hadoop GroupsMapping to map user to a primary group. If the primary group is not found, it fallback to the USER level.
    • SERVER: the engine will be shared by Kyuubi servers, and the engine will be launched by Server’s user.
    See also kyuubi.engine.share.level.subdomain and kyuubi.engine.doAs.enabled.    		 string 1.2.0
    kyuubi.engine.share.level.sub.domain <undefined> (deprecated) - Using kyuubi.engine.share.level.subdomain instead string 1.2.0
    kyuubi.engine.share.level.subdomain <undefined> Allow end-users to create a subdomain for the share level of an engine. A subdomain is a case-insensitive string values that must be a valid zookeeper subpath. For example, for the USER share level, an end-user can share a certain engine within a subdomain, not for all of its clients. End-users are free to create multiple engines in the USER share level. When disable engine pool, use ‘default’ if absent. string 1.4.0
    kyuubi.engine.single.spark.session false When set to true, this engine is running in a single session mode. All the JDBC/ODBC connections share the temporary views, function registries, SQL configuration and the current database. boolean 1.3.0
    kyuubi.engine.spark.event.loggers SPARK A comma-separated list of engine loggers, where engine/session/operation etc events go.
    • SPARK: the events will be written to the Spark listener bus.
    • JSON: the events will be written to the location of kyuubi.engine.event.json.log.path
    • JDBC: to be done
    • CUSTOM: to be done.
    		 seq 1.7.0
    kyuubi.engine.spark.initialize.sql SHOW DATABASES The initialize sql for Spark engine. It fallback to kyuubi.engine.initialize.sql. seq 1.8.1
    kyuubi.engine.spark.output.mode AUTO The output mode of Spark engine:
    • AUTO: For PySpark, the extracted text/plain from python response as output.
    • NOTEBOOK: For PySpark, the original python response as output.
    		 string 1.9.0
    kyuubi.engine.spark.python.env.archive <undefined> Portable Python env archive used for Spark engine Python language mode. string 1.7.0
    kyuubi.engine.spark.python.env.archive.exec.path bin/python The Python exec path under the Python env archive. string 1.7.0
    kyuubi.engine.spark.python.home.archive <undefined> Spark archive containing $SPARK_HOME/python directory, which is used to init session Python worker for Python language mode. string 1.7.0
    kyuubi.engine.submit.timeout PT30S Period to tolerant Driver Pod ephemerally invisible after submitting. In some Resource Managers, e.g. K8s, the Driver Pod is not visible immediately after spark-submit is returned. duration 1.7.1
    kyuubi.engine.trino.connection.keystore.password <undefined> The keystore password used for connecting to trino cluster string 1.8.0
    kyuubi.engine.trino.connection.keystore.path <undefined> The keystore path used for connecting to trino cluster string 1.8.0
    kyuubi.engine.trino.connection.keystore.type <undefined> The keystore type used for connecting to trino cluster string 1.8.0
    kyuubi.engine.trino.connection.password <undefined> The password used for connecting to trino cluster string 1.8.0
    kyuubi.engine.trino.connection.truststore.password <undefined> The truststore password used for connecting to trino cluster string 1.8.0
    kyuubi.engine.trino.connection.truststore.path <undefined> The truststore path used for connecting to trino cluster string 1.8.0
    kyuubi.engine.trino.connection.truststore.type <undefined> The truststore type used for connecting to trino cluster string 1.8.0
    kyuubi.engine.trino.connection.user <undefined> The user used for connecting to trino cluster string 1.9.0
    kyuubi.engine.trino.event.loggers JSON A comma-separated list of engine history loggers, where engine/session/operation etc events go.
    • JSON: the events will be written to the location of kyuubi.engine.event.json.log.path
    • JDBC: to be done
    • CUSTOM: to be done.
    		 seq 1.7.0
    kyuubi.engine.trino.extra.classpath <undefined> The extra classpath for the Trino query engine, for configuring other libs which may need by the Trino engine string 1.6.0
    kyuubi.engine.trino.java.options <undefined> The extra Java options for the Trino query engine string 1.6.0
    kyuubi.engine.trino.memory 1g The heap memory for the Trino query engine string 1.6.0
    kyuubi.engine.type SPARK_SQL Specify the detailed engine supported by Kyuubi. The engine type bindings to SESSION scope. This configuration is experimental. Currently, available configs are:
    • SPARK_SQL: specify this engine type will launch a Spark engine which can provide all the capacity of the Apache Spark. Note, it’s a default engine type.
    • FLINK_SQL: specify this engine type will launch a Flink engine which can provide all the capacity of the Apache Flink.
    • TRINO: specify this engine type will launch a Trino engine which can provide all the capacity of the Trino.
    • HIVE_SQL: specify this engine type will launch a Hive engine which can provide all the capacity of the Hive Server2.
    • JDBC: specify this engine type will launch a JDBC engine which can forward queries to the database system through the certain JDBC driver, for now, it supports Doris, MySQL, Phoenix, PostgreSQL, StarRocks and Impala.
    • CHAT: specify this engine type will launch a Chat engine.
    		 string 1.4.0
    kyuubi.engine.ui.retainedSessions 200 The number of SQL client sessions kept in the Kyuubi Query Engine web UI. int 1.4.0
    kyuubi.engine.ui.retainedStatements 200 The number of statements kept in the Kyuubi Query Engine web UI. int 1.4.0
    kyuubi.engine.ui.stop.enabled true When true, allows Kyuubi engine to be killed from the Spark Web UI. boolean 1.3.0
    kyuubi.engine.user.isolated.spark.session true When set to false, if the engine is running in a group or server share level, all the JDBC/ODBC connections will be isolated against the user. Including the temporary views, function registries, SQL configuration, and the current database. Note that, it does not affect if the share level is connection or user. boolean 1.6.0
    kyuubi.engine.user.isolated.spark.session.idle.interval PT1M The interval to check if the user-isolated Spark session is timeout. duration 1.6.0
    kyuubi.engine.user.isolated.spark.session.idle.timeout PT6H If kyuubi.engine.user.isolated.spark.session is false, we will release the Spark session if its corresponding user is inactive after this configured timeout. duration 1.6.0
    kyuubi.engine.yarn.app.name <undefined> The YARN app name when the engine deploy mode is YARN. string 1.9.0
    kyuubi.engine.yarn.cores 1 kyuubi engine container core number when the engine deploy mode is YARN. int 1.9.0
    kyuubi.engine.yarn.java.options <undefined> The extra Java options for the AM when the engine deploy mode is YARN. string 1.9.0
    kyuubi.engine.yarn.memory 1024 kyuubi engine container memory in mb when the engine deploy mode is YARN. int 1.9.0
    kyuubi.engine.yarn.priority <undefined> kyuubi engine yarn priority when the engine deploy mode is YARN. int 1.9.0
    kyuubi.engine.yarn.queue default kyuubi engine yarn queue when the engine deploy mode is YARN. string 1.9.0
    kyuubi.engine.yarn.stagingDir <undefined> Staging directory used while submitting kyuubi engine to YARN, It should be a absolute path in HDFS. string 1.9.0
    kyuubi.engine.yarn.submit.timeout PT30S The engine submit timeout for YARN application. duration 1.7.2
    kyuubi.engine.yarn.tags <undefined> kyuubi engine yarn tags when the engine deploy mode is YARN. seq 1.9.0

    Event

    Key Default Meaning Type Since
    kyuubi.event.async.pool.keepalive.time PT1M Time(ms) that an idle async thread of the async event handler thread pool will wait for a new task to arrive before terminating duration 1.7.0
    kyuubi.event.async.pool.size 8 Number of threads in the async event handler thread pool int 1.7.0
    kyuubi.event.async.pool.wait.queue.size 100 Size of the wait queue for the async event handler thread pool int 1.7.0

    Frontend

    Key Default Meaning Type Since
    kyuubi.frontend.advertised.host <undefined> Hostname or IP of the Kyuubi server’s frontend services to publish to external systems such as the service discovery ensemble and metadata store. Use it when you want to advertise a different hostname or IP than the bind host. string 1.8.0
    kyuubi.frontend.bind.host <undefined> Hostname or IP of the machine on which to run the frontend services. string 1.0.0
    kyuubi.frontend.bind.port 10009 (deprecated) Port of the machine on which to run the thrift frontend service via the binary protocol. int 1.0.0
    kyuubi.frontend.connection.url.use.hostname true When true, frontend services prefer hostname, otherwise, ip address. Note that, the default value is set to false when engine running on Kubernetes to prevent potential network issues. boolean 1.5.0
    kyuubi.frontend.max.message.size 104857600 (deprecated) Maximum message size in bytes a Kyuubi server will accept. int 1.0.0
    kyuubi.frontend.max.worker.threads 999 (deprecated) Maximum number of threads in the frontend worker thread pool for the thrift frontend service int 1.0.0
    kyuubi.frontend.min.worker.threads 9 (deprecated) Minimum number of threads in the frontend worker thread pool for the thrift frontend service int 1.0.0
    kyuubi.frontend.mysql.bind.host <undefined> Hostname or IP of the machine on which to run the MySQL frontend service. string 1.4.0
    kyuubi.frontend.mysql.bind.port 3309 Port of the machine on which to run the MySQL frontend service. int 1.4.0
    kyuubi.frontend.mysql.max.worker.threads 999 Maximum number of threads in the command execution thread pool for the MySQL frontend service int 1.4.0
    kyuubi.frontend.mysql.min.worker.threads 9 Minimum number of threads in the command execution thread pool for the MySQL frontend service int 1.4.0
    kyuubi.frontend.mysql.netty.worker.threads <undefined> Number of thread in the netty worker event loop of MySQL frontend service. Use min(cpu_cores, 8) in default. int 1.4.0
    kyuubi.frontend.mysql.worker.keepalive.time PT1M Time(ms) that an idle async thread of the command execution thread pool will wait for a new task to arrive before terminating in MySQL frontend service duration 1.4.0
    kyuubi.frontend.protocols THRIFT_BINARY,REST A comma-separated list for all frontend protocols
    • THRIFT_BINARY - HiveServer2 compatible thrift binary protocol.
    • THRIFT_HTTP - HiveServer2 compatible thrift http protocol.
    • REST - Kyuubi defined REST API(experimental).
    • MYSQL - MySQL compatible text protocol(experimental).
    • TRINO - Trino compatible http protocol(experimental).
    		 seq 1.4.0
    kyuubi.frontend.proxy.http.client.ip.header X-Real-IP The HTTP header to record the real client IP address. If your server is behind a load balancer or other proxy, the server will see this load balancer or proxy IP address as the client IP address, to get around this common issue, most load balancers or proxies offer the ability to record the real remote IP address in an HTTP header that will be added to the request for other devices to use. Note that, because the header value can be specified to any IP address, so it will not be used for authentication. string 1.6.0
    kyuubi.frontend.rest.bind.host <undefined> Hostname or IP of the machine on which to run the REST frontend service. string 1.4.0
    kyuubi.frontend.rest.bind.port 10099 Port of the machine on which to run the REST frontend service. int 1.4.0
    kyuubi.frontend.rest.jetty.stopTimeout PT5S Stop timeout for Jetty server used by the RESTful frontend service. duration 1.8.1
    kyuubi.frontend.rest.max.worker.threads 999 Maximum number of threads in the frontend worker thread pool for the rest frontend service int 1.6.2
    kyuubi.frontend.ssl.keystore.algorithm <undefined> SSL certificate keystore algorithm. string 1.7.0
    kyuubi.frontend.ssl.keystore.password <undefined> SSL certificate keystore password. string 1.7.0
    kyuubi.frontend.ssl.keystore.path <undefined> SSL certificate keystore location. string 1.7.0
    kyuubi.frontend.ssl.keystore.type <undefined> SSL certificate keystore type. string 1.7.0
    kyuubi.frontend.thrift.binary.bind.host <undefined> Hostname or IP of the machine on which to run the thrift frontend service via the binary protocol. string 1.4.0
    kyuubi.frontend.thrift.binary.bind.port 10009 Port of the machine on which to run the thrift frontend service via the binary protocol. int 1.4.0
    kyuubi.frontend.thrift.binary.ssl.disallowed.protocols SSLv2,SSLv3 SSL versions to disallow for Kyuubi thrift binary frontend. set 1.7.0
    kyuubi.frontend.thrift.binary.ssl.enabled false Set this to true for using SSL encryption in thrift binary frontend server. boolean 1.7.0
    kyuubi.frontend.thrift.binary.ssl.include.ciphersuites A comma-separated list of include SSL cipher suite names for thrift binary frontend. seq 1.7.0
    kyuubi.frontend.thrift.http.bind.host <undefined> Hostname or IP of the machine on which to run the thrift frontend service via http protocol. string 1.6.0
    kyuubi.frontend.thrift.http.bind.port 10010 Port of the machine on which to run the thrift frontend service via http protocol. int 1.6.0
    kyuubi.frontend.thrift.http.compression.enabled true Enable thrift http compression via Jetty compression support boolean 1.6.0
    kyuubi.frontend.thrift.http.cookie.auth.enabled true When true, Kyuubi in HTTP transport mode, will use cookie-based authentication mechanism boolean 1.6.0
    kyuubi.frontend.thrift.http.cookie.domain <undefined> Domain for the Kyuubi generated cookies string 1.6.0
    kyuubi.frontend.thrift.http.cookie.is.httponly true HttpOnly attribute of the Kyuubi generated cookie. boolean 1.6.0
    kyuubi.frontend.thrift.http.cookie.max.age 86400 Maximum age in seconds for server side cookie used by Kyuubi in HTTP mode. int 1.6.0
    kyuubi.frontend.thrift.http.cookie.path <undefined> Path for the Kyuubi generated cookies string 1.6.0
    kyuubi.frontend.thrift.http.max.idle.time PT30M Maximum idle time for a connection on the server when in HTTP mode. duration 1.6.0
    kyuubi.frontend.thrift.http.path cliservice Path component of URL endpoint when in HTTP mode. string 1.6.0
    kyuubi.frontend.thrift.http.request.header.size 6144 Request header size in bytes, when using HTTP transport mode. Jetty defaults used. int 1.6.0
    kyuubi.frontend.thrift.http.response.header.size 6144 Response header size in bytes, when using HTTP transport mode. Jetty defaults used. int 1.6.0
    kyuubi.frontend.thrift.http.ssl.exclude.ciphersuites A comma-separated list of exclude SSL cipher suite names for thrift http frontend. seq 1.7.0
    kyuubi.frontend.thrift.http.ssl.keystore.password <undefined> SSL certificate keystore password. string 1.6.0
    kyuubi.frontend.thrift.http.ssl.keystore.path <undefined> SSL certificate keystore location. string 1.6.0
    kyuubi.frontend.thrift.http.ssl.protocol.blacklist SSLv2,SSLv3 SSL Versions to disable when using HTTP transport mode. seq 1.6.0
    kyuubi.frontend.thrift.http.use.SSL false Set this to true for using SSL encryption in http mode. boolean 1.6.0
    kyuubi.frontend.thrift.http.xsrf.filter.enabled false If enabled, Kyuubi will block any requests made to it over HTTP if an X-XSRF-HEADER header is not present boolean 1.6.0
    kyuubi.frontend.thrift.max.message.size 104857600 Maximum message size in bytes a Kyuubi server will accept. int 1.4.0
    kyuubi.frontend.thrift.max.worker.threads 999 Maximum number of threads in the frontend worker thread pool for the thrift frontend service int 1.4.0
    kyuubi.frontend.thrift.min.worker.threads 9 Minimum number of threads in the frontend worker thread pool for the thrift frontend service int 1.4.0
    kyuubi.frontend.thrift.worker.keepalive.time PT1M Keep-alive time (in milliseconds) for an idle worker thread duration 1.4.0
    kyuubi.frontend.trino.bind.host <undefined> Hostname or IP of the machine on which to run the TRINO frontend service. string 1.7.0
    kyuubi.frontend.trino.bind.port 10999 Port of the machine on which to run the TRINO frontend service. int 1.7.0
    kyuubi.frontend.trino.jetty.stopTimeout PT5S Stop timeout for Jetty server used by the Trino frontend service. duration 1.8.1
    kyuubi.frontend.trino.max.worker.threads 999 Maximum number of threads in the frontend worker thread pool for the Trino frontend service int 1.7.0
    kyuubi.frontend.worker.keepalive.time PT1M (deprecated) Keep-alive time (in milliseconds) for an idle worker thread duration 1.0.0

    Ha

    Key Default Meaning Type Since
    kyuubi.ha.addresses The connection string for the discovery ensemble string 1.6.0
    kyuubi.ha.client.class org.apache.kyuubi.ha.client.zookeeper.ZookeeperDiscoveryClient Class name for service discovery client.
    • Zookeeper: org.apache.kyuubi.ha.client.zookeeper.ZookeeperDiscoveryClient
    • Etcd: org.apache.kyuubi.ha.client.etcd.EtcdDiscoveryClient
    		 string 1.6.0
    kyuubi.ha.etcd.lease.timeout PT10S Timeout for etcd keep alive lease. The kyuubi server will know the unexpected loss of engine after up to this seconds. duration 1.6.0
    kyuubi.ha.etcd.ssl.ca.path <undefined> Where the etcd CA certificate file is stored. string 1.6.0
    kyuubi.ha.etcd.ssl.client.certificate.path <undefined> Where the etcd SSL certificate file is stored. string 1.6.0
    kyuubi.ha.etcd.ssl.client.key.path <undefined> Where the etcd SSL key file is stored. string 1.6.0
    kyuubi.ha.etcd.ssl.enabled false When set to true, will build an SSL secured etcd client. boolean 1.6.0
    kyuubi.ha.namespace kyuubi The root directory for the service to deploy its instance uri string 1.6.0
    kyuubi.ha.zookeeper.acl.enabled false (deprecated) Set to true if the ZooKeeper ensemble is kerberized boolean 1.0.0
    kyuubi.ha.zookeeper.auth.digest <undefined> The digest auth string is used for ZooKeeper authentication, like: username:password. string 1.3.2
    kyuubi.ha.zookeeper.auth.keytab <undefined> Location of the Kyuubi server’s keytab that is used for ZooKeeper authentication. string 1.3.2
    kyuubi.ha.zookeeper.auth.principal <undefined> Kerberos principal name that is used for ZooKeeper authentication. string 1.3.2
    kyuubi.ha.zookeeper.auth.serverPrincipal <undefined> Kerberos principal name of ZooKeeper Server. It only takes effect when Zookeeper client’s version at least 3.5.7 or 3.6.0 or applies ZOOKEEPER-1467. To use Zookeeper 3.6 client, compile Kyuubi with -Pzookeeper-3.6. string 1.8.0
    kyuubi.ha.zookeeper.auth.type NONE The type of ZooKeeper authentication, all candidates are
    • NONE
    • KERBEROS
    • DIGEST
    		 string 1.3.2
    kyuubi.ha.zookeeper.connection.base.retry.wait 1000 Initial amount of time to wait between retries to the ZooKeeper ensemble int 1.0.0
    kyuubi.ha.zookeeper.connection.max.retries 3 Max retry times for connecting to the ZooKeeper ensemble int 1.0.0
    kyuubi.ha.zookeeper.connection.max.retry.wait 30000 Max amount of time to wait between retries for BOUNDED_EXPONENTIAL_BACKOFF policy can reach, or max time until elapsed for UNTIL_ELAPSED policy to connect the zookeeper ensemble int 1.0.0
    kyuubi.ha.zookeeper.connection.retry.policy EXPONENTIAL_BACKOFF The retry policy for connecting to the ZooKeeper ensemble, all candidates are:
    • ONE_TIME
    • N_TIME
    • EXPONENTIAL_BACKOFF
    • BOUNDED_EXPONENTIAL_BACKOFF
    • UNTIL_ELAPSED
    		 string 1.0.0
    kyuubi.ha.zookeeper.connection.timeout 15000 The timeout(ms) of creating the connection to the ZooKeeper ensemble int 1.0.0
    kyuubi.ha.zookeeper.engine.auth.type NONE The type of ZooKeeper authentication for the engine, all candidates are
    • NONE
    • KERBEROS
    • DIGEST
    		 string 1.3.2
    kyuubi.ha.zookeeper.namespace kyuubi (deprecated) The root directory for the service to deploy its instance uri string 1.0.0
    kyuubi.ha.zookeeper.node.creation.timeout PT2M Timeout for creating ZooKeeper node duration 1.2.0
    kyuubi.ha.zookeeper.publish.configs false When set to true, publish Kerberos configs to Zookeeper. Note that the Hive driver needs to be greater than 1.3 or 2.0 or apply HIVE-11581 patch. boolean 1.4.0
    kyuubi.ha.zookeeper.quorum (deprecated) The connection string for the ZooKeeper ensemble string 1.0.0
    kyuubi.ha.zookeeper.session.timeout 60000 The timeout(ms) of a connected session to be idled int 1.0.0

    Kinit

    Key Default Meaning Type Since
    kyuubi.kinit.interval PT1H How often will the Kyuubi server run kinit -kt [keytab] [principal] to renew the local Kerberos credentials cache duration 1.0.0
    kyuubi.kinit.keytab <undefined> Location of Kyuubi server’s keytab. string 1.0.0
    kyuubi.kinit.max.attempts 10 How many times will kinit process retry int 1.0.0
    kyuubi.kinit.principal <undefined> Name of the Kerberos principal. string 1.0.0

    Kubernetes

    Key Default Meaning Type Since
    kyuubi.kubernetes.application.state.container spark-kubernetes-driver The container name to retrieve the application state from. string 1.8.1
    kyuubi.kubernetes.application.state.source POD The source to retrieve the application state from. The valid values are pod and container. If the source is container and there is container inside the pod with the name of kyuubi.kubernetes.application.state.container, the application state will be from the matched container state. Otherwise, the application state will be from the pod state. string 1.8.1
    kyuubi.kubernetes.authenticate.caCertFile <undefined> Path to the CA cert file for connecting to the Kubernetes API server over TLS from the kyuubi. Specify this as a path as opposed to a URI (i.e. do not provide a scheme) string 1.7.0
    kyuubi.kubernetes.authenticate.clientCertFile <undefined> Path to the client cert file for connecting to the Kubernetes API server over TLS from the kyuubi. Specify this as a path as opposed to a URI (i.e. do not provide a scheme) string 1.7.0
    kyuubi.kubernetes.authenticate.clientKeyFile <undefined> Path to the client key file for connecting to the Kubernetes API server over TLS from the kyuubi. Specify this as a path as opposed to a URI (i.e. do not provide a scheme) string 1.7.0
    kyuubi.kubernetes.authenticate.oauthToken <undefined> The OAuth token to use when authenticating against the Kubernetes API server. Note that unlike, the other authentication options, this must be the exact string value of the token to use for the authentication. string 1.7.0
    kyuubi.kubernetes.authenticate.oauthTokenFile <undefined> Path to the file containing the OAuth token to use when authenticating against the Kubernetes API server. Specify this as a path as opposed to a URI (i.e. do not provide a scheme) string 1.7.0
    kyuubi.kubernetes.context <undefined> The desired context from your kubernetes config file used to configure the K8s client for interacting with the cluster. string 1.6.0
    kyuubi.kubernetes.context.allow.list The allowed kubernetes context list, if it is empty, there is no kubernetes context limitation. set 1.8.0
    kyuubi.kubernetes.master.address <undefined> The internal Kubernetes master (API server) address to be used for kyuubi. string 1.7.0
    kyuubi.kubernetes.namespace default The namespace that will be used for running the kyuubi pods and find engines. string 1.7.0
    kyuubi.kubernetes.namespace.allow.list The allowed kubernetes namespace list, if it is empty, there is no kubernetes namespace limitation. set 1.8.0
    kyuubi.kubernetes.spark.cleanupTerminatedDriverPod.checkInterval PT1M Kyuubi server use guava cache as the cleanup trigger with time-based eviction, but the eviction would not happened until any get/put operation happened. This option schedule a daemon thread evict cache periodically. duration 1.8.1
    kyuubi.kubernetes.spark.cleanupTerminatedDriverPod.kind NONE Kyuubi server will delete the spark driver pod after the application terminates for kyuubi.kubernetes.terminatedApplicationRetainPeriod. Available options are NONE, ALL, COMPLETED and default value is None which means none of the pod will be deleted string 1.8.1
    kyuubi.kubernetes.spark.forciblyRewriteDriverPodName.enabled false Whether to forcibly rewrite Spark driver pod name with ‘kyuubi--driver’. If disabled, Kyuubi will try to preserve the application name while satisfying K8s’ pod name policy, but some vendors may have stricter pod name policies, thus the generated name may become illegal. boolean 1.8.1
    kyuubi.kubernetes.spark.forciblyRewriteExecutorPodNamePrefix.enabled false Whether to forcibly rewrite Spark executor pod name prefix with ‘kyuubi-‘. If disabled, Kyuubi will try to preserve the application name while satisfying K8s’ pod name policy, but some vendors may have stricter Pod name policies, thus the generated name may become illegal. boolean 1.8.1
    kyuubi.kubernetes.terminatedApplicationRetainPeriod PT5M The period for which the Kyuubi server retains application information after the application terminates. duration 1.7.1
    kyuubi.kubernetes.trust.certificates false If set to true then client can submit to kubernetes cluster only with token boolean 1.7.0

    Lineage

    Key Default Meaning Type Since
    kyuubi.lineage.parser.plugin.provider org.apache.kyuubi.plugin.lineage.LineageParserProvider The provider for the Spark lineage parser plugin. string 1.8.0

    Metadata

    Key Default Meaning Type Since
    kyuubi.metadata.cleaner.enabled true Whether to clean the metadata periodically. If it is enabled, Kyuubi will clean the metadata that is in the terminate state with max age limitation. boolean 1.6.0
    kyuubi.metadata.cleaner.interval PT30M The interval to check and clean expired metadata. duration 1.6.0
    kyuubi.metadata.max.age PT72H The maximum age of metadata, the metadata exceeding the age will be cleaned. duration 1.6.0
    kyuubi.metadata.recovery.threads 10 The number of threads for recovery from the metadata store when the Kyuubi server restarts. int 1.6.0
    kyuubi.metadata.request.async.retry.enabled true Whether to retry in async when metadata request failed. When true, return success response immediately even the metadata request failed, and schedule it in background until success, to tolerate long-time metadata store outages w/o blocking the submission request. boolean 1.7.0
    kyuubi.metadata.request.async.retry.queue.size 65536 The maximum queue size for buffering metadata requests in memory when the external metadata storage is down. Requests will be dropped if the queue exceeds. Only take affect when kyuubi.metadata.request.async.retry.enabled is true. int 1.6.0
    kyuubi.metadata.request.async.retry.threads 10 Number of threads in the metadata request async retry manager thread pool. Only take affect when kyuubi.metadata.request.async.retry.enabled is true. int 1.6.0
    kyuubi.metadata.request.retry.interval PT5S The interval to check and trigger the metadata request retry tasks. duration 1.6.0
    kyuubi.metadata.store.class org.apache.kyuubi.server.metadata.jdbc.JDBCMetadataStore Fully qualified class name for server metadata store. string 1.6.0
    kyuubi.metadata.store.jdbc.database.schema.init true Whether to init the JDBC metadata store database schema. boolean 1.6.0
    kyuubi.metadata.store.jdbc.database.type SQLITE The database type for server jdbc metadata store.
    • SQLITE: SQLite3, JDBC driver org.sqlite.JDBC.
    • MYSQL: MySQL, JDBC driver com.mysql.cj.jdbc.Driver (fallback com.mysql.jdbc.Driver).
    • POSTGRESQL: PostgreSQL, JDBC driver org.postgresql.Driver.
    • CUSTOM: User-defined database type, need to specify corresponding JDBC driver.
      • Note that: The JDBC datasource is powered by HiKariCP, for datasource properties, please specify them with the prefix: kyuubi.metadata.store.jdbc.datasource. For example, kyuubi.metadata.store.jdbc.datasource.connectionTimeout=10000.
    		 string 1.6.0
    kyuubi.metadata.store.jdbc.driver <undefined> JDBC driver class name for server jdbc metadata store. string 1.6.0
    kyuubi.metadata.store.jdbc.password The password for server JDBC metadata store. string 1.6.0
    kyuubi.metadata.store.jdbc.priority.enabled false Whether to enable the priority scheduling for batch impl v2. When false, ignore kyuubi.batch.priority and use the FIFO ordering strategy for batch job scheduling. Note: this feature may cause significant performance issues when using MySQL 5.7 as the metastore backend due to the lack of support for mixed order index. See more details at KYUUBI #5329. boolean 1.8.0
    kyuubi.metadata.store.jdbc.url jdbc:sqlite:<KYUUBI_HOME>/kyuubi_state_store.db The JDBC url for server JDBC metadata store. By default, it is a SQLite database url, and the state information is not shared across Kyuubi instances. To enable high availability for multiple kyuubi instances, please specify a production JDBC url. Note: this value support the variables substitution: <KYUUBI_HOME>. string 1.6.0
    kyuubi.metadata.store.jdbc.user The username for server JDBC metadata store. string 1.6.0

    Metrics

    Key Default Meaning Type Since
    kyuubi.metrics.console.interval PT5S How often should report metrics to console duration 1.2.0
    kyuubi.metrics.enabled true Set to true to enable kyuubi metrics system boolean 1.2.0
    kyuubi.metrics.json.interval PT5S How often should report metrics to JSON file duration 1.2.0
    kyuubi.metrics.json.location metrics Where the JSON metrics file located string 1.2.0
    kyuubi.metrics.prometheus.path /metrics URI context path of prometheus metrics HTTP server string 1.2.0
    kyuubi.metrics.prometheus.port 10019 Prometheus metrics HTTP server port int 1.2.0
    kyuubi.metrics.reporters PROMETHEUS A comma-separated list for all metrics reporters
    • CONSOLE - ConsoleReporter which outputs measurements to CONSOLE periodically.
    • JMX - JmxReporter which listens for new metrics and exposes them as MBeans.
    • JSON - JsonReporter which outputs measurements to json file periodically.
    • PROMETHEUS - PrometheusReporter which exposes metrics in Prometheus format.
    • SLF4J - Slf4jReporter which outputs measurements to system log periodically.
    		 set 1.2.0
    kyuubi.metrics.slf4j.interval PT5S How often should report metrics to SLF4J logger duration 1.2.0

    Operation

    Key Default Meaning Type Since
    kyuubi.operation.getTables.ignoreTableProperties false Speed up the GetTables operation by ignoring tableTypes query criteria, and returning table identities only. boolean 1.8.0
    kyuubi.operation.idle.timeout PT3H Operation will be closed when it’s not accessed for this duration of time duration 1.0.0
    kyuubi.operation.interrupt.on.cancel true When true, all running tasks will be interrupted if one cancels a query. When false, all running tasks will remain until finished. boolean 1.2.0
    kyuubi.operation.language SQL Choose a programing language for the following inputs
    • SQL: (Default) Run all following statements as SQL queries.
    • SCALA: Run all following input as scala codes
    • PYTHON: (Experimental) Run all following input as Python codes with Spark engine
    		 string 1.5.0
    kyuubi.operation.log.dir.root server_operation_logs Root directory for query operation log at server-side. string 1.4.0
    kyuubi.operation.plan.only.excludes SetCatalogAndNamespace,UseStatement,SetNamespaceCommand,SetCommand,ResetCommand Comma-separated list of query plan names, in the form of simple class names, i.e, for SET abc=xyz, the value will be SetCommand. For those auxiliary plans, such as switch databases, set properties, or create temporary view etc., which are used for setup evaluating environments for analyzing actual queries, we can use this config to exclude them and let them take effect. See also kyuubi.operation.plan.only.mode. set 1.5.0
    kyuubi.operation.plan.only.mode none Configures the statement performed mode, The value can be ‘parse’, ‘analyze’, ‘optimize’, ‘optimize_with_stats’, ‘physical’, ‘execution’, ‘lineage’ or ‘none’, when it is ‘none’, indicate to the statement will be fully executed, otherwise only way without executing the query. different engines currently support different modes, the Spark engine supports all modes, and the Flink engine supports ‘parse’, ‘physical’, and ‘execution’, other engines do not support planOnly currently. string 1.4.0
    kyuubi.operation.plan.only.output.style plain Configures the planOnly output style. The value can be ‘plain’ or ‘json’, and the default value is ‘plain’. This configuration supports only the output styles of the Spark engine string 1.7.0
    kyuubi.operation.progress.enabled false Whether to enable the operation progress. When true, the operation progress will be returned in GetOperationStatus. boolean 1.6.0
    kyuubi.operation.query.timeout <undefined> Timeout for query executions at server-side, take effect with client-side timeout(java.sql.Statement.setQueryTimeout) together, a running query will be cancelled automatically if timeout. It’s off by default, which means only client-side take full control of whether the query should timeout or not. If set, client-side timeout is capped at this point. To cancel the queries right away without waiting for task to finish, consider enabling kyuubi.operation.interrupt.on.cancel together. duration 1.2.0
    kyuubi.operation.result.arrow.timestampAsString false When true, arrow-based rowsets will convert columns of type timestamp to strings for transmission. boolean 1.7.0
    kyuubi.operation.result.format thrift Specify the result format, available configs are:
    • THRIFT: the result will convert to TRow at the engine driver side.
    • ARROW: the result will be encoded as Arrow at the executor side before collecting by the driver, and deserialized at the client side. note that it only takes effect for kyuubi-hive-jdbc clients now.
    		 string 1.7.0
    kyuubi.operation.result.max.rows 0 Max rows of Spark query results. Rows exceeding the limit would be ignored. By setting this value to 0 to disable the max rows limit. int 1.6.0
    kyuubi.operation.result.saveToFile.dir /tmp/kyuubi/tmp_kyuubi_result The Spark query result save dir, it should be a public accessible to every engine. Results are saved in ORC format, and the directory structure is /OPERATION_RESULT_SAVE_TO_FILE_DIR/engineId/sessionId/statementId. Each query result will delete when query finished. string 1.9.0
    kyuubi.operation.result.saveToFile.enabled false The switch for Spark query result save to file. boolean 1.9.0
    kyuubi.operation.result.saveToFile.minRows 10000 The minRows of Spark result save to file, default value is 10000. long 1.9.1
    kyuubi.operation.result.saveToFile.minSize 209715200 The minSize of Spark result save to file, default value is 200 MB.we use spark’s EstimationUtils#getSizePerRowestimate to estimate the output size of the execution plan. long 1.9.0
    kyuubi.operation.scheduler.pool <undefined> The scheduler pool of job. Note that, this config should be used after changing Spark config spark.scheduler.mode=FAIR. string 1.1.1
    kyuubi.operation.spark.listener.enabled true When set to true, Spark engine registers an SQLOperationListener before executing the statement, logging a few summary statistics when each stage completes. boolean 1.6.0
    kyuubi.operation.status.polling.timeout PT5S Timeout(ms) for long polling asynchronous running sql query’s status duration 1.0.0

    Server

    Key Default Meaning Type Since
    kyuubi.server.administrators Comma-separated list of Kyuubi service administrators. We use this config to grant admin permission to any service accounts when security mechanism is enabled. Note, when kyuubi.authentication is configured to NOSASL or NONE, everyone is treated as administrator. set 1.8.0
    kyuubi.server.info.provider ENGINE The server information provider name, some clients may rely on this information to check the server compatibilities and functionalities.
  • SERVER: Return Kyuubi server information.
  • ENGINE: Return Kyuubi engine information.
    		•  string 1.6.1
    kyuubi.server.limit.batch.connections.per.ipaddress <undefined> Maximum kyuubi server batch connections per ipaddress. Any user exceeding this limit will not be allowed to connect. int 1.7.0
    kyuubi.server.limit.batch.connections.per.user <undefined> Maximum kyuubi server batch connections per user. Any user exceeding this limit will not be allowed to connect. int 1.7.0
    kyuubi.server.limit.batch.connections.per.user.ipaddress <undefined> Maximum kyuubi server batch connections per user:ipaddress combination. Any user-ipaddress exceeding this limit will not be allowed to connect. int 1.7.0
    kyuubi.server.limit.client.fetch.max.rows <undefined> Max rows limit for getting result row set operation. If the max rows specified by client-side is larger than the limit, request will fail directly. int 1.8.0
    kyuubi.server.limit.connections.ip.deny.list The client ip in the deny list will be denied to connect to kyuubi server. set 1.9.1
    kyuubi.server.limit.connections.per.ipaddress <undefined> Maximum kyuubi server connections per ipaddress. Any user exceeding this limit will not be allowed to connect. int 1.6.0
    kyuubi.server.limit.connections.per.user <undefined> Maximum kyuubi server connections per user. Any user exceeding this limit will not be allowed to connect. int 1.6.0
    kyuubi.server.limit.connections.per.user.ipaddress <undefined> Maximum kyuubi server connections per user:ipaddress combination. Any user-ipaddress exceeding this limit will not be allowed to connect. int 1.6.0
    kyuubi.server.limit.connections.user.deny.list The user in the deny list will be denied to connect to kyuubi server, if the user has configured both user.unlimited.list and user.deny.list, the priority of the latter is higher. set 1.8.0
    kyuubi.server.limit.connections.user.unlimited.list The maximum connections of the user in the white list will not be limited. set 1.7.0
    kyuubi.server.name <undefined> The name of Kyuubi Server. string 1.5.0
    kyuubi.server.periodicGC.interval PT30M How often to trigger a garbage collection. duration 1.7.0
    kyuubi.server.redaction.regex <undefined> Regex to decide which Kyuubi contain sensitive information. When this regex matches a property key or value, the value is redacted from the various logs. 1.6.0
    kyuubi.server.thrift.resultset.default.fetch.size 1000 The number of rows sent in one Fetch RPC call by the server to the client, if not specified by the client. Respect hive.server2.thrift.resultset.default.fetch.size hive conf. int 1.9.1

    Session

    Key Default Meaning Type Since
    kyuubi.session.check.interval PT5M The check interval for session timeout. duration 1.0.0
    kyuubi.session.close.on.disconnect true Session will be closed when client disconnects from kyuubi gateway. Set this to false to have session outlive its parent connection. boolean 1.8.0
    kyuubi.session.conf.advisor <undefined> A config advisor plugin for Kyuubi Server. This plugin can provide a list of custom configs for different users or session configs and overwrite the session configs before opening a new session. This config value should be a subclass of org.apache.kyuubi.plugin.SessionConfAdvisor which has a zero-arg constructor. seq 1.5.0
    kyuubi.session.conf.file.reload.interval PT10M When FileSessionConfAdvisor is used, this configuration defines the expired time of $KYUUBI_CONF_DIR/kyuubi-session-<profile>.conf in the cache. After exceeding this value, the file will be reloaded. duration 1.7.0
    kyuubi.session.conf.ignore.list A comma-separated list of ignored keys. If the client connection contains any of them, the key and the corresponding value will be removed silently during engine bootstrap and connection setup. Note that this rule is for server-side protection defined via administrators to prevent some essential configs from tampering but will not forbid users to set dynamic configurations via SET syntax. set 1.2.0
    kyuubi.session.conf.profile <undefined> Specify a profile to load session-level configurations from $KYUUBI_CONF_DIR/kyuubi-session-<profile>.conf. This configuration will be ignored if the file does not exist. This configuration only takes effect when kyuubi.session.conf.advisor is set as org.apache.kyuubi.session.FileSessionConfAdvisor. string 1.7.0
    kyuubi.session.conf.restrict.list A comma-separated list of restricted keys. If the client connection contains any of them, the connection will be rejected explicitly during engine bootstrap and connection setup. Note that this rule is for server-side protection defined via administrators to prevent some essential configs from tampering but will not forbid users to set dynamic configurations via SET syntax. set 1.2.0
    kyuubi.session.engine.alive.max.failures 3 The maximum number of failures allowed for the engine. int 1.8.1
    kyuubi.session.engine.alive.probe.enabled false Whether to enable the engine alive probe, it true, we will create a companion thrift client that keeps sending simple requests to check whether the engine is alive. boolean 1.6.0
    kyuubi.session.engine.alive.probe.interval PT10S The interval for engine alive probe. duration 1.6.0
    kyuubi.session.engine.alive.timeout PT2M The timeout for engine alive. If there is no alive probe success in the last timeout window, the engine will be marked as no-alive. duration 1.6.0
    kyuubi.session.engine.check.interval PT1M The check interval for engine timeout duration 1.0.0
    kyuubi.session.engine.flink.fetch.timeout <undefined> Result fetch timeout for Flink engine. If the timeout is reached, the result fetch would be stopped and the current fetched would be returned. If no data are fetched, a TimeoutException would be thrown. duration 1.8.0
    kyuubi.session.engine.flink.initialize.sql The initialize sql for Flink session. It fallback to kyuubi.engine.session.initialize.sql seq 1.8.1
    kyuubi.session.engine.flink.main.resource <undefined> The package used to create Flink SQL engine remote job. If it is undefined, Kyuubi will use the default string 1.4.0
    kyuubi.session.engine.flink.max.rows 1000000 Max rows of Flink query results. For batch queries, rows exceeding the limit would be ignored. For streaming queries, the query would be canceled if the limit is reached. int 1.5.0
    kyuubi.session.engine.hive.main.resource <undefined> The package used to create Hive engine remote job. If it is undefined, Kyuubi will use the default string 1.6.0
    kyuubi.session.engine.idle.timeout PT30M engine timeout, the engine will self-terminate when it’s not accessed for this duration. 0 or negative means not to self-terminate. duration 1.0.0
    kyuubi.session.engine.initialize.timeout PT3M Timeout for starting the background engine, e.g. SparkSQLEngine. duration 1.0.0
    kyuubi.session.engine.launch.async true When opening kyuubi session, whether to launch the backend engine asynchronously. When true, the Kyuubi server will set up the connection with the client without delay as the backend engine will be created asynchronously. boolean 1.4.0
    kyuubi.session.engine.log.timeout PT24H If we use Spark as the engine then the session submit log is the console output of spark-submit. We will retain the session submit log until over the config value. duration 1.1.0
    kyuubi.session.engine.login.timeout PT15S The timeout of creating the connection to remote sql query engine duration 1.0.0
    kyuubi.session.engine.open.max.attempts 9 The number of times an open engine will retry when encountering a special error. int 1.7.0
    kyuubi.session.engine.open.onFailure RETRY The behavior when opening engine failed:
    • RETRY: retry to open engine for kyuubi.session.engine.open.max.attempts times.
    • DEREGISTER_IMMEDIATELY: deregister the engine immediately.
    • DEREGISTER_AFTER_RETRY: deregister the engine after retry to open engine for kyuubi.session.engine.open.max.attempts times.
    		 string 1.8.1
    kyuubi.session.engine.open.retry.wait PT10S How long to wait before retrying to open the engine after failure. duration 1.7.0
    kyuubi.session.engine.share.level USER (deprecated) - Using kyuubi.engine.share.level instead string 1.0.0
    kyuubi.session.engine.spark.initialize.sql The initialize sql for Spark session. It fallback to kyuubi.engine.session.initialize.sql seq 1.8.1
    kyuubi.session.engine.spark.main.resource <undefined> The package used to create Spark SQL engine remote application. If it is undefined, Kyuubi will use the default string 1.0.0
    kyuubi.session.engine.spark.max.initial.wait PT1M Max wait time for the initial connection to Spark engine. The engine will self-terminate no new incoming connection is established within this time. This setting only applies at the CONNECTION share level. 0 or negative means not to self-terminate. duration 1.8.0
    kyuubi.session.engine.spark.max.lifetime PT0S Max lifetime for Spark engine, the engine will self-terminate when it reaches the end of life. 0 or negative means not to self-terminate. duration 1.6.0
    kyuubi.session.engine.spark.max.lifetime.gracefulPeriod PT0S Graceful period for Spark engine to wait the connections disconnected after reaching the end of life. After the graceful period, all the connections without running operations will be forcibly disconnected. 0 or negative means always waiting the connections disconnected. duration 1.8.1
    kyuubi.session.engine.spark.progress.timeFormat yyyy-MM-dd HH:mm:ss.SSS The time format of the progress bar string 1.6.0
    kyuubi.session.engine.spark.progress.update.interval PT1S Update period of progress bar. duration 1.6.0
    kyuubi.session.engine.spark.showProgress false When true, show the progress bar in the Spark’s engine log. boolean 1.6.0
    kyuubi.session.engine.startup.destroy.timeout PT5S Engine startup process destroy wait time, if the process does not stop after this time, force destroy instead. This configuration only takes effect when kyuubi.session.engine.startup.waitCompletion=false. duration 1.8.0
    kyuubi.session.engine.startup.error.max.size 8192 During engine bootstrapping, if anderror occurs, using this config to limit the length of error message(characters). int 1.1.0
    kyuubi.session.engine.startup.maxLogLines 10 The maximum number of engine log lines when errors occur during the engine startup phase. Note that this config effects on client-side to help track engine startup issues. int 1.4.0
    kyuubi.session.engine.startup.waitCompletion true Whether to wait for completion after the engine starts. If false, the startup process will be destroyed after the engine is started. Note that only use it when the driver is not running locally, such as in yarn-cluster mode; Otherwise, the engine will be killed. boolean 1.5.0
    kyuubi.session.engine.trino.connection.catalog <undefined> The default catalog that Trino engine will connect to string 1.5.0
    kyuubi.session.engine.trino.connection.url <undefined> The server url that Trino engine will connect to string 1.5.0
    kyuubi.session.engine.trino.main.resource <undefined> The package used to create Trino engine remote job. If it is undefined, Kyuubi will use the default string 1.5.0
    kyuubi.session.engine.trino.showProgress true When true, show the progress bar and final info in the Trino engine log. boolean 1.6.0
    kyuubi.session.engine.trino.showProgress.debug false When true, show the progress debug info in the Trino engine log. boolean 1.6.0
    kyuubi.session.group.provider hadoop A group provider plugin for Kyuubi Server. This plugin can provide primary group and groups information for different users or session configs. This config value should be a subclass of org.apache.kyuubi.plugin.GroupProvider which has a zero-arg constructor. Kyuubi provides the following built-in implementations:
  • hadoop: delegate the user group mapping to hadoop UserGroupInformation.
    		•  string 1.7.0
    kyuubi.session.idle.timeout PT6H session idle timeout, it will be closed when it’s not accessed for this duration duration 1.2.0
    kyuubi.session.local.dir.allow.list The local dir list that are allowed to access by the kyuubi session application. End-users might set some parameters such as spark.files and it will upload some local files when launching the kyuubi engine, if the local dir allow list is defined, kyuubi will check whether the path to upload is in the allow list. Note that, if it is empty, there is no limitation for that. And please use absolute paths. set 1.6.0
    kyuubi.session.name <undefined> A human readable name of the session and we use empty string by default. This name will be recorded in the event. Note that, we only apply this value from session conf. string 1.4.0
    kyuubi.session.proxy.user <undefined> An alternative to hive.server2.proxy.user. The current behavior is consistent with hive.server2.proxy.user and now only takes effect in RESTFul API. When both parameters are set, kyuubi.session.proxy.user takes precedence. string 1.9.0
    kyuubi.session.timeout PT6H (deprecated)session timeout, it will be closed when it’s not accessed for this duration duration 1.0.0
    kyuubi.session.user.sign.enabled false Whether to verify the integrity of session user name on the engine side, e.g. Authz plugin in Spark. boolean 1.7.0

    Spnego

    Key Default Meaning Type Since
    kyuubi.spnego.keytab <undefined> Keytab file for SPNego principal string 1.6.0
    kyuubi.spnego.principal <undefined> SPNego service principal, typical value would look like HTTP/_HOST@EXAMPLE.COM. SPNego service principal would be used when restful Kerberos security is enabled. This needs to be set only if SPNEGO is to be used in authentication. string 1.6.0

    Yarn

    Key Default Meaning Type Since
    kyuubi.yarn.user.admin yarn When kyuubi.yarn.user.strategy is set to ADMIN, use this admin user to construct YARN client for application management, e.g. kill application. string 1.8.0
    kyuubi.yarn.user.strategy NONE Determine which user to use to construct YARN client for application management, e.g. kill application. Options:
    • NONE: use Kyuubi server user.
    • ADMIN: use admin user configured in kyuubi.yarn.user.admin.
    • OWNER: use session user, typically is application owner.
    		 string 1.8.0

    Zookeeper

    Key Default Meaning Type Since
    kyuubi.zookeeper.embedded.client.port 2181 clientPort for the embedded ZooKeeper server to listen for client connections, a client here could be Kyuubi server, engine, and JDBC client int 1.2.0
    kyuubi.zookeeper.embedded.client.port.address <undefined> clientPortAddress for the embedded ZooKeeper server to string 1.2.0
    kyuubi.zookeeper.embedded.client.use.hostname false When true, embedded Zookeeper prefer to bind hostname, otherwise, ip address. boolean 1.7.2
    kyuubi.zookeeper.embedded.data.dir embedded_zookeeper dataDir for the embedded zookeeper server where stores the in-memory database snapshots and, unless specified otherwise, the transaction log of updates to the database. If it is a relative path, it is resolved relative to KYUUBI_HOME. string 1.2.0
    kyuubi.zookeeper.embedded.data.log.dir embedded_zookeeper dataLogDir for the embedded ZooKeeper server where writes the transaction log. If it is a relative path, it is resolved relative to KYUUBI_HOME. string 1.2.0
    kyuubi.zookeeper.embedded.directory embedded_zookeeper (deprecated) The temporary directory for the embedded ZooKeeper server. If it is a relative path, it is resolved relative to KYUUBI_HOME. string 1.0.0
    kyuubi.zookeeper.embedded.max.client.connections 120 maxClientCnxns for the embedded ZooKeeper server to limit the number of concurrent connections of a single client identified by IP address int 1.2.0
    kyuubi.zookeeper.embedded.max.session.timeout 60000 maxSessionTimeout in milliseconds for the embedded ZooKeeper server will allow the client to negotiate. Defaults to 20 times the tickTime int 1.2.0
    kyuubi.zookeeper.embedded.min.session.timeout 6000 minSessionTimeout in milliseconds for the embedded ZooKeeper server will allow the client to negotiate. Defaults to 2 times the tickTime int 1.2.0
    kyuubi.zookeeper.embedded.port 2181 (deprecated) The port of the embedded ZooKeeper server int 1.0.0
    kyuubi.zookeeper.embedded.tick.time 3000 tickTime in milliseconds for the embedded ZooKeeper server int 1.2.0

    Spark Configurations

    Via spark-defaults.conf

    Setting them in $SPARK_HOME/conf/spark-defaults.conf supplies with default values for SQL engine application. Available properties can be found at Spark official online documentation for Spark Configurations

    Via kyuubi-defaults.conf

    Setting them in $KYUUBI_HOME/conf/kyuubi-defaults.conf supplies with default values for SQL engine application too. These properties will override all settings in $SPARK_HOME/conf/spark-defaults.conf

    Via JDBC Connection URL

    Setting them in the JDBC Connection URL supplies session-specific for each SQL engine. For example:

    1. jdbc:hive2://localhost:10009/default;#spark.sql.shuffle.partitions=2;spark.executor.memory=5g
    • Runtime SQL Configuration
    • Static SQL and Spark Core Configuration
      • For Static SQL Configurations and other spark core configs, e.g. spark.executor.memory, they will take effect if there is no existing SQL engine application. Otherwise, they will just be ignored

    Via SET Syntax

    Please refer to the Spark official online documentation for SET Command

    Setting them in $FLINK_HOME/conf/flink-conf.yaml supplies with default values for SQL engine application. Available properties can be found at Flink official online documentation for Flink Configurations

    Via kyuubi-defaults.conf

    Setting them in $KYUUBI_HOME/conf/kyuubi-defaults.conf supplies with default values for SQL engine application too. You can use properties with the additional prefix flink. to override settings in $FLINK_HOME/conf/flink-conf.yaml.

    For example:

    1. flink.parallelism.default 2
    2. flink.taskmanager.memory.process.size 5g

    The below options in kyuubi-defaults.conf will set parallelism.default: 2 and taskmanager.memory.process.size: 5g into flink configurations.

    Via JDBC Connection URL

    Setting them in the JDBC Connection URL supplies session-specific for each SQL engine. For example:

    1. jdbc:hive2://localhost:10009/default;#flink.parallelism.default=2;flink.taskmanager.memory.process.size=5g

    Via SET Statements

    Please refer to the Flink official online documentation for SET Statements

    Trino Configurations

    Via config.properties

    Setting them in $TRINO_HOME/etc/config.properties supplies with default values for SQL engine application. Available properties can be found at Trino official online documentation for Trino Configurations

    Via kyuubi-defaults.conf

    Setting them in $KYUUBI_HOME/conf/kyuubi-defaults.conf supplies with default values for SQL engine application too. You can use properties with the additional prefix trino. to override settings in $TRINO_HOME/etc/config.properties.

    For example:

    1. trino.query_max_stage_count 500
    2. trino.parse_decimal_literals_as_double true

    The below options in kyuubi-defaults.conf will set query_max_stage_count: 500 and parse_decimal_literals_as_double: true into trino session properties.

    Via JDBC Connection URL

    Setting them in the JDBC Connection URL supplies session-specific for each SQL engine. For example:

    1. jdbc:hive2://localhost:10009/default;#trino.query_max_stage_count=500;trino.parse_decimal_literals_as_double=true

    Via SET Statements

    Please refer to the Trino official online documentation for SET Statements

    Logging

    Kyuubi uses log4j for logging. You can configure it using $KYUUBI_HOME/conf/log4j2.xml, see $KYUUBI_HOME/conf/log4j2.xml.template as an example.

    Other Configurations

    Hadoop Configurations

    Specifying HADOOP_CONF_DIR to the directory containing Hadoop configuration files or treating them as Spark properties with a spark.hadoop. prefix. Please refer to the Spark official online documentation for Inheriting Hadoop Cluster Configuration. Also, please refer to the Apache Hadoop‘s online documentation for an overview on how to configure Hadoop.

    Hive Configurations

    These configurations are used for SQL engine application to talk to Hive MetaStore and could be configured in a hive-site.xml. Placed it in $SPARK_HOME/conf directory, or treat them as Spark properties with a spark.hadoop. prefix.

    User Defaults

    In Kyuubi, we can configure user default settings to meet separate needs. These user defaults override system defaults, but will be overridden by those from JDBC Connection URL or Set Command if could be. They will take effect when creating the SQL engine application ONLY. User default settings are in the form of ___{username}___.{config key}. There are three continuous underscores(_) at both sides of the username and a dot(.) that separates the config key and the prefix. For example:

    1. # For system defaults
    2. spark.master=local
    3. spark.sql.adaptive.enabled=true
    4. # For a user named kent
    5. ___kent___.spark.master=yarn
    6. ___kent___.spark.sql.adaptive.enabled=false
    7. # For a user named bob
    8. ___bob___.spark.master=spark://master:7077
    9. ___bob___.spark.executor.memory=8g

    In the above case, if there are related configurations from JDBC Connection URL, kent will run his SQL engine application on YARN and prefer the Spark AQE to be off, while bob will activate his SQL engine application on a Spark standalone cluster with 8g heap memory for each executor and obey the Spark AQE behavior of Kyuubi system default. On the other hand, for those users who do not have custom configurations will use system defaults.