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Kafka Connect Configs
Below is the configuration of the Kafka Connect framework.
config.storage.topic
The name of the Kafka topic where connector configurations are stored
Type: string Default: Valid Values: Importance: high group.id
A unique string that identifies the Connect cluster group this worker belongs to.
Type: string Default: Valid Values: Importance: high key.converter
Converter class used to convert between Kafka Connect format and the serialized form that is written to Kafka. This controls the format of the keys in messages written to or read from Kafka, and since this is independent of connectors it allows any connector to work with any serialization format. Examples of common formats include JSON and Avro.
Type: class Default: Valid Values: Importance: high offset.storage.topic
The name of the Kafka topic where source connector offsets are stored
Type: string Default: Valid Values: Importance: high status.storage.topic
The name of the Kafka topic where connector and task status are stored
Type: string Default: Valid Values: Importance: high value.converter
Converter class used to convert between Kafka Connect format and the serialized form that is written to Kafka. This controls the format of the values in messages written to or read from Kafka, and since this is independent of connectors it allows any connector to work with any serialization format. Examples of common formats include JSON and Avro.
Type: class Default: Valid Values: Importance: high bootstrap.servers
A list of host/port pairs to use for establishing the initial connection to the Kafka cluster. The client will make use of all servers irrespective of which servers are specified here for bootstrapping—this list only impacts the initial hosts used to discover the full set of servers. This list should be in the form
host1:port1,host2:port2,.... Since these servers are just used for the initial connection to discover the full cluster membership (which may change dynamically), this list need not contain the full set of servers (you may want more than one, though, in case a server is down).Type: list Default: localhost:9092 Valid Values: Importance: high exactly.once.source.support
Whether to enable exactly-once support for source connectors in the cluster by using transactions to write source records and their source offsets, and by proactively fencing out old task generations before bringing up new ones.
To enable exactly-once source support on a new cluster, set this property to 'enabled'. To enable support on an existing cluster, first set to 'preparing' on every worker in the cluster, then set to 'enabled'. A rolling upgrade may be used for both changes. For more information on this feature, see the exactly-once source support documentation.Type: string Default: disabled Valid Values: (case insensitive) [DISABLED, ENABLED, PREPARING] Importance: high heartbeat.interval.ms
The expected time between heartbeats to the group coordinator when using Kafka's group management facilities. Heartbeats are used to ensure that the worker's session stays active and to facilitate rebalancing when new members join or leave the group. The value must be set lower than
session.timeout.ms, but typically should be set no higher than 1/3 of that value. It can be adjusted even lower to control the expected time for normal rebalances.Type: int Default: 3000 (3 seconds) Valid Values: Importance: high rebalance.timeout.ms
The maximum allowed time for each worker to join the group once a rebalance has begun. This is basically a limit on the amount of time needed for all tasks to flush any pending data and commit offsets. If the timeout is exceeded, then the worker will be removed from the group, which will cause offset commit failures.
Type: int Default: 60000 (1 minute) Valid Values: Importance: high session.timeout.ms
The timeout used to detect worker failures. The worker sends periodic heartbeats to indicate its liveness to the broker. If no heartbeats are received by the broker before the expiration of this session timeout, then the broker will remove the worker from the group and initiate a rebalance. Note that the value must be in the allowable range as configured in the broker configuration by
group.min.session.timeout.msandgroup.max.session.timeout.ms.Type: int Default: 10000 (10 seconds) Valid Values: Importance: high ssl.key.password
The password of the private key in the key store file or the PEM key specified in 'ssl.keystore.key'.
Type: password Default: null Valid Values: Importance: high ssl.keystore.certificate.chain
Certificate chain in the format specified by 'ssl.keystore.type'. Default SSL engine factory supports only PEM format with a list of X.509 certificates
Type: password Default: null Valid Values: Importance: high ssl.keystore.key
Private key in the format specified by 'ssl.keystore.type'. Default SSL engine factory supports only PEM format with PKCS#8 keys. If the key is encrypted, key password must be specified using 'ssl.key.password'
Type: password Default: null Valid Values: Importance: high ssl.keystore.location
The location of the key store file. This is optional for client and can be used for two-way authentication for client.
Type: string Default: null Valid Values: Importance: high ssl.keystore.password
The store password for the key store file. This is optional for client and only needed if 'ssl.keystore.location' is configured. Key store password is not supported for PEM format.
Type: password Default: null Valid Values: Importance: high ssl.truststore.certificates
Trusted certificates in the format specified by 'ssl.truststore.type'. Default SSL engine factory supports only PEM format with X.509 certificates.
Type: password Default: null Valid Values: Importance: high ssl.truststore.location
The location of the trust store file.
Type: string Default: null Valid Values: Importance: high ssl.truststore.password
The password for the trust store file. If a password is not set, trust store file configured will still be used, but integrity checking is disabled. Trust store password is not supported for PEM format.
Type: password Default: null Valid Values: Importance: high client.dns.lookup
Controls how the client uses DNS lookups. If set to
use_all_dns_ips, connect to each returned IP address in sequence until a successful connection is established. After a disconnection, the next IP is used. Once all IPs have been used once, the client resolves the IP(s) from the hostname again (both the JVM and the OS cache DNS name lookups, however). If set toresolve_canonical_bootstrap_servers_only, resolve each bootstrap address into a list of canonical names. After the bootstrap phase, this behaves the same asuse_all_dns_ips.Type: string Default: use_all_dns_ips Valid Values: [use_all_dns_ips, resolve_canonical_bootstrap_servers_only] Importance: medium connections.max.idle.ms
Close idle connections after the number of milliseconds specified by this config.
Type: long Default: 540000 (9 minutes) Valid Values: Importance: medium connector.client.config.override.policy
Class name or alias of implementation of
ConnectorClientConfigOverridePolicy. Defines what client configurations can be overridden by the connector. The default implementation is `All`, meaning connector configurations can override all client properties. The other possible policies in the framework include `None` to disallow connectors from overriding client properties, and `Principal` to allow connectors to override only client principals.Type: string Default: All Valid Values: Importance: medium receive.buffer.bytes
The size of the TCP receive buffer (SO_RCVBUF) to use when reading data. If the value is -1, the OS default will be used.
Type: int Default: 32768 (32 kibibytes) Valid Values: [-1,...] Importance: medium request.timeout.ms
The configuration controls the maximum amount of time the client will wait for the response of a request. If the response is not received before the timeout elapses the client will resend the request if necessary or fail the request if retries are exhausted.
Type: int Default: 40000 (40 seconds) Valid Values: [0,...] Importance: medium sasl.client.callback.handler.class
The fully qualified name of a SASL client callback handler class that implements the AuthenticateCallbackHandler interface.
Type: class Default: null Valid Values: Importance: medium sasl.jaas.config
JAAS login context parameters for SASL connections in the format used by JAAS configuration files. JAAS configuration file format is described here. The format for the value is:
loginModuleClass controlFlag (optionName=optionValue)*;. For brokers, the config must be prefixed with listener prefix and SASL mechanism name in lower-case. For example, listener.name.sasl_ssl.scram-sha-256.sasl.jaas.config=com.example.ScramLoginModule required;Type: password Default: null Valid Values: Importance: medium sasl.kerberos.service.name
The Kerberos principal name that Kafka runs as. This can be defined either in Kafka's JAAS config or in Kafka's config.
Type: string Default: null Valid Values: Importance: medium sasl.login.callback.handler.class
The fully qualified name of a SASL login callback handler class that implements the AuthenticateCallbackHandler interface. For brokers, login callback handler config must be prefixed with listener prefix and SASL mechanism name in lower-case. For example, listener.name.sasl_ssl.scram-sha-256.sasl.login.callback.handler.class=com.example.CustomScramLoginCallbackHandler
Type: class Default: null Valid Values: Importance: medium sasl.login.class
The fully qualified name of a class that implements the Login interface. For brokers, login config must be prefixed with listener prefix and SASL mechanism name in lower-case. For example, listener.name.sasl_ssl.scram-sha-256.sasl.login.class=com.example.CustomScramLogin
Type: class Default: null Valid Values: Importance: medium sasl.mechanism
SASL mechanism used for client connections. This may be any mechanism for which a security provider is available. GSSAPI is the default mechanism.
Type: string Default: GSSAPI Valid Values: Importance: medium sasl.oauthbearer.jwks.endpoint.url
The OAuth/OIDC provider URL from which the provider's JWKS (JSON Web Key Set) can be retrieved. The URL can be HTTP(S)-based or file-based. If the URL is HTTP(S)-based, the JWKS data will be retrieved from the OAuth/OIDC provider via the configured URL on broker startup. All then-current keys will be cached on the broker for incoming requests. If an authentication request is received for a JWT that includes a "kid" header claim value that isn't yet in the cache, the JWKS endpoint will be queried again on demand. However, the broker polls the URL every sasl.oauthbearer.jwks.endpoint.refresh.ms milliseconds to refresh the cache with any forthcoming keys before any JWT requests that include them are received. If the URL is file-based, the broker will load the JWKS file from a configured location on startup. In the event that the JWT includes a "kid" header value that isn't in the JWKS file, the broker will reject the JWT and authentication will fail.
Type: string Default: null Valid Values: Importance: medium sasl.oauthbearer.token.endpoint.url
The URL for the OAuth/OIDC identity provider. If the URL is HTTP(S)-based, it is the issuer's token endpoint URL to which requests will be made to login based on the configuration in sasl.jaas.config. If the URL is file-based, it specifies a file containing an access token (in JWT serialized form) issued by the OAuth/OIDC identity provider to use for authorization.
Type: string Default: null Valid Values: Importance: medium security.protocol
Protocol used to communicate with brokers. Valid values are: PLAINTEXT, SSL, SASL_PLAINTEXT, SASL_SSL.
Type: string Default: PLAINTEXT Valid Values: (case insensitive) [SASL_SSL, PLAINTEXT, SSL, SASL_PLAINTEXT] Importance: medium send.buffer.bytes
The size of the TCP send buffer (SO_SNDBUF) to use when sending data. If the value is -1, the OS default will be used.
Type: int Default: 131072 (128 kibibytes) Valid Values: [-1,...] Importance: medium ssl.enabled.protocols
The list of protocols enabled for SSL connections. The default is 'TLSv1.2,TLSv1.3' when running with Java 11 or newer, 'TLSv1.2' otherwise. With the default value for Java 11, clients and servers will prefer TLSv1.3 if both support it and fallback to TLSv1.2 otherwise (assuming both support at least TLSv1.2). This default should be fine for most cases. Also see the config documentation for `ssl.protocol`.
Type: list Default: TLSv1.2 Valid Values: Importance: medium ssl.keystore.type
The file format of the key store file. This is optional for client. The values currently supported by the default `ssl.engine.factory.class` are [JKS, PKCS12, PEM].
Type: string Default: JKS Valid Values: Importance: medium ssl.protocol
The SSL protocol used to generate the SSLContext. The default is 'TLSv1.3' when running with Java 11 or newer, 'TLSv1.2' otherwise. This value should be fine for most use cases. Allowed values in recent JVMs are 'TLSv1.2' and 'TLSv1.3'. 'TLS', 'TLSv1.1', 'SSL', 'SSLv2' and 'SSLv3' may be supported in older JVMs, but their usage is discouraged due to known security vulnerabilities. With the default value for this config and 'ssl.enabled.protocols', clients will downgrade to 'TLSv1.2' if the server does not support 'TLSv1.3'. If this config is set to 'TLSv1.2', clients will not use 'TLSv1.3' even if it is one of the values in ssl.enabled.protocols and the server only supports 'TLSv1.3'.
Type: string Default: TLSv1.2 Valid Values: Importance: medium ssl.provider
The name of the security provider used for SSL connections. Default value is the default security provider of the JVM.
Type: string Default: null Valid Values: Importance: medium ssl.truststore.type
The file format of the trust store file. The values currently supported by the default `ssl.engine.factory.class` are [JKS, PKCS12, PEM].
Type: string Default: JKS Valid Values: Importance: medium worker.sync.timeout.ms
When the worker is out of sync with other workers and needs to resynchronize configurations, wait up to this amount of time before giving up, leaving the group, and waiting a backoff period before rejoining.
Type: int Default: 3000 (3 seconds) Valid Values: Importance: medium worker.unsync.backoff.ms
When the worker is out of sync with other workers and fails to catch up within worker.sync.timeout.ms, leave the Connect cluster for this long before rejoining.
Type: int Default: 300000 (5 minutes) Valid Values: Importance: medium access.control.allow.methods
Sets the methods supported for cross origin requests by setting the Access-Control-Allow-Methods header. The default value of the Access-Control-Allow-Methods header allows cross origin requests for GET, POST and HEAD.
Type: string Default: "" Valid Values: Importance: low access.control.allow.origin
Value to set the Access-Control-Allow-Origin header to for REST API requests.To enable cross origin access, set this to the domain of the application that should be permitted to access the API, or '*' to allow access from any domain. The default value only allows access from the domain of the REST API.
Type: string Default: "" Valid Values: Importance: low admin.listeners
List of comma-separated URIs the Admin REST API will listen on. The supported protocols are HTTP and HTTPS. An empty or blank string will disable this feature. The default behavior is to use the regular listener (specified by the 'listeners' property).
Type: list Default: null Valid Values: List of comma-separated URLs, ex: http://localhost:8080,https://localhost:8443. Importance: low auto.include.jmx.reporter
Deprecated. Whether to automatically include JmxReporter even if it's not listed in
metric.reporters. This configuration will be removed in Kafka 4.0, users should instead includeorg.apache.kafka.common.metrics.JmxReporterinmetric.reportersin order to enable the JmxReporter.Type: boolean Default: true Valid Values: Importance: low client.id
An id string to pass to the server when making requests. The purpose of this is to be able to track the source of requests beyond just ip/port by allowing a logical application name to be included in server-side request logging.
Type: string Default: "" Valid Values: Importance: low config.providers
Comma-separated names of
ConfigProviderclasses, loaded and used in the order specified. Implementing the interfaceConfigProviderallows you to replace variable references in connector configurations, such as for externalized secrets.Type: list Default: "" Valid Values: Importance: low config.storage.replication.factor
Replication factor used when creating the configuration storage topic
Type: short Default: 3 Valid Values: Positive number not larger than the number of brokers in the Kafka cluster, or -1 to use the broker's default Importance: low connect.protocol
Compatibility mode for Kafka Connect Protocol
Type: string Default: sessioned Valid Values: [eager, compatible, sessioned] Importance: low header.converter
HeaderConverter class used to convert between Kafka Connect format and the serialized form that is written to Kafka. This controls the format of the header values in messages written to or read from Kafka, and since this is independent of connectors it allows any connector to work with any serialization format. Examples of common formats include JSON and Avro. By default, the SimpleHeaderConverter is used to serialize header values to strings and deserialize them by inferring the schemas.
Type: class Default: org.apache.kafka.connect.storage.SimpleHeaderConverter Valid Values: Importance: low inter.worker.key.generation.algorithm
The algorithm to use for generating internal request keys. The algorithm 'HmacSHA256' will be used as a default on JVMs that support it; on other JVMs, no default is used and a value for this property must be manually specified in the worker config.
Type: string Default: HmacSHA256 Valid Values: Any KeyGenerator algorithm supported by the worker JVM Importance: low inter.worker.key.size
The size of the key to use for signing internal requests, in bits. If null, the default key size for the key generation algorithm will be used.
Type: int Default: null Valid Values: Importance: low inter.worker.key.ttl.ms
The TTL of generated session keys used for internal request validation (in milliseconds)
Type: int Default: 3600000 (1 hour) Valid Values: [0,...,2147483647] Importance: low inter.worker.signature.algorithm
The algorithm used to sign internal requestsThe algorithm 'inter.worker.signature.algorithm' will be used as a default on JVMs that support it; on other JVMs, no default is used and a value for this property must be manually specified in the worker config.
Type: string Default: HmacSHA256 Valid Values: Any MAC algorithm supported by the worker JVM Importance: low inter.worker.verification.algorithms
A list of permitted algorithms for verifying internal requests, which must include the algorithm used for the inter.worker.signature.algorithm property. The algorithm(s) '[HmacSHA256]' will be used as a default on JVMs that provide them; on other JVMs, no default is used and a value for this property must be manually specified in the worker config.
Type: list Default: HmacSHA256 Valid Values: A list of one or more MAC algorithms, each supported by the worker JVM Importance: low listeners
List of comma-separated URIs the REST API will listen on. The supported protocols are HTTP and HTTPS.
Specify hostname as 0.0.0.0 to bind to all interfaces.
Leave hostname empty to bind to default interface.
Examples of legal listener lists: HTTP://myhost:8083,HTTPS://myhost:8084Type: list Default: http://:8083 Valid Values: List of comma-separated URLs, ex: http://localhost:8080,https://localhost:8443. Importance: low metadata.max.age.ms
The period of time in milliseconds after which we force a refresh of metadata even if we haven't seen any partition leadership changes to proactively discover any new brokers or partitions.
Type: long Default: 300000 (5 minutes) Valid Values: [0,...] Importance: low metric.reporters
A list of classes to use as metrics reporters. Implementing the
org.apache.kafka.common.metrics.MetricsReporterinterface allows plugging in classes that will be notified of new metric creation. The JmxReporter is always included to register JMX statistics.Type: list Default: "" Valid Values: Importance: low metrics.num.samples
The number of samples maintained to compute metrics.
Type: int Default: 2 Valid Values: [1,...] Importance: low metrics.recording.level
The highest recording level for metrics.
Type: string Default: INFO Valid Values: [INFO, DEBUG] Importance: low metrics.sample.window.ms
The window of time a metrics sample is computed over.
Type: long Default: 30000 (30 seconds) Valid Values: [0,...] Importance: low offset.flush.interval.ms
Interval at which to try committing offsets for tasks.
Type: long Default: 60000 (1 minute) Valid Values: Importance: low offset.flush.timeout.ms
Maximum number of milliseconds to wait for records to flush and partition offset data to be committed to offset storage before cancelling the process and restoring the offset data to be committed in a future attempt. This property has no effect for source connectors running with exactly-once support.
Type: long Default: 5000 (5 seconds) Valid Values: Importance: low offset.storage.partitions
The number of partitions used when creating the offset storage topic
Type: int Default: 25 Valid Values: Positive number, or -1 to use the broker's default Importance: low offset.storage.replication.factor
Replication factor used when creating the offset storage topic
Type: short Default: 3 Valid Values: Positive number not larger than the number of brokers in the Kafka cluster, or -1 to use the broker's default Importance: low plugin.discovery
Method to use to discover plugins present in the classpath and plugin.path configuration. This can be one of multiple values with the following meanings:
* only_scan: Discover plugins only by reflection. Plugins which are not discoverable by ServiceLoader will not impact worker startup.
* hybrid_warn: Discover plugins reflectively and by ServiceLoader. Plugins which are not discoverable by ServiceLoader will print warnings during worker startup.
* hybrid_fail: Discover plugins reflectively and by ServiceLoader. Plugins which are not discoverable by ServiceLoader will cause worker startup to fail.
* service_load: Discover plugins only by ServiceLoader. Faster startup than other modes. Plugins which are not discoverable by ServiceLoader may not be usable.Type: string Default: hybrid_warn Valid Values: (case insensitive) [ONLY_SCAN, SERVICE_LOAD, HYBRID_WARN, HYBRID_FAIL] Importance: low plugin.path
List of paths separated by commas (,) that contain plugins (connectors, converters, transformations). The list should consist of top level directories that include any combination of:
a) directories immediately containing jars with plugins and their dependencies
b) uber-jars with plugins and their dependencies
c) directories immediately containing the package directory structure of classes of plugins and their dependencies
Note: symlinks will be followed to discover dependencies or plugins.
Examples: plugin.path=/usr/local/share/java,/usr/local/share/kafka/plugins,/opt/connectors
Do not use config provider variables in this property, since the raw path is used by the worker's scanner before config providers are initialized and used to replace variables.Type: list Default: null Valid Values: Importance: low reconnect.backoff.max.ms
The maximum amount of time in milliseconds to wait when reconnecting to a broker that has repeatedly failed to connect. If provided, the backoff per host will increase exponentially for each consecutive connection failure, up to this maximum. After calculating the backoff increase, 20% random jitter is added to avoid connection storms.
Type: long Default: 1000 (1 second) Valid Values: [0,...] Importance: low reconnect.backoff.ms
The base amount of time to wait before attempting to reconnect to a given host. This avoids repeatedly connecting to a host in a tight loop. This backoff applies to all connection attempts by the client to a broker. This value is the initial backoff value and will increase exponentially for each consecutive connection failure, up to the
reconnect.backoff.max.msvalue.Type: long Default: 50 Valid Values: [0,...] Importance: low response.http.headers.config
Rules for REST API HTTP response headers
Type: string Default: "" Valid Values: Comma-separated header rules, where each header rule is of the form '[action] [header name]:[header value]' and optionally surrounded by double quotes if any part of a header rule contains a comma Importance: low rest.advertised.host.name
If this is set, this is the hostname that will be given out to other workers to connect to.
Type: string Default: null Valid Values: Importance: low rest.advertised.listener
Sets the advertised listener (HTTP or HTTPS) which will be given to other workers to use.
Type: string Default: null Valid Values: Importance: low rest.advertised.port
If this is set, this is the port that will be given out to other workers to connect to.
Type: int Default: null Valid Values: Importance: low rest.extension.classes
Comma-separated names of
ConnectRestExtensionclasses, loaded and called in the order specified. Implementing the interfaceConnectRestExtensionallows you to inject into Connect's REST API user defined resources like filters. Typically used to add custom capability like logging, security, etc.Type: list Default: "" Valid Values: Importance: low retry.backoff.max.ms
The maximum amount of time in milliseconds to wait when retrying a request to the broker that has repeatedly failed. If provided, the backoff per client will increase exponentially for each failed request, up to this maximum. To prevent all clients from being synchronized upon retry, a randomized jitter with a factor of 0.2 will be applied to the backoff, resulting in the backoff falling within a range between 20% below and 20% above the computed value. If
retry.backoff.msis set to be higher thanretry.backoff.max.ms, thenretry.backoff.max.mswill be used as a constant backoff from the beginning without any exponential increaseType: long Default: 1000 (1 second) Valid Values: [0,...] Importance: low retry.backoff.ms
The amount of time to wait before attempting to retry a failed request to a given topic partition. This avoids repeatedly sending requests in a tight loop under some failure scenarios. This value is the initial backoff value and will increase exponentially for each failed request, up to the
retry.backoff.max.msvalue.Type: long Default: 100 Valid Values: [0,...] Importance: low sasl.kerberos.kinit.cmd
Kerberos kinit command path.
Type: string Default: /usr/bin/kinit Valid Values: Importance: low sasl.kerberos.min.time.before.relogin
Login thread sleep time between refresh attempts.
Type: long Default: 60000 Valid Values: Importance: low sasl.kerberos.ticket.renew.jitter
Percentage of random jitter added to the renewal time.
Type: double Default: 0.05 Valid Values: Importance: low sasl.kerberos.ticket.renew.window.factor
Login thread will sleep until the specified window factor of time from last refresh to ticket's expiry has been reached, at which time it will try to renew the ticket.
Type: double Default: 0.8 Valid Values: Importance: low sasl.login.connect.timeout.ms
The (optional) value in milliseconds for the external authentication provider connection timeout. Currently applies only to OAUTHBEARER.
Type: int Default: null Valid Values: Importance: low sasl.login.read.timeout.ms
The (optional) value in milliseconds for the external authentication provider read timeout. Currently applies only to OAUTHBEARER.
Type: int Default: null Valid Values: Importance: low sasl.login.refresh.buffer.seconds
The amount of buffer time before credential expiration to maintain when refreshing a credential, in seconds. If a refresh would otherwise occur closer to expiration than the number of buffer seconds then the refresh will be moved up to maintain as much of the buffer time as possible. Legal values are between 0 and 3600 (1 hour); a default value of 300 (5 minutes) is used if no value is specified. This value and sasl.login.refresh.min.period.seconds are both ignored if their sum exceeds the remaining lifetime of a credential. Currently applies only to OAUTHBEARER.
Type: short Default: 300 Valid Values: [0,...,3600] Importance: low sasl.login.refresh.min.period.seconds
The desired minimum time for the login refresh thread to wait before refreshing a credential, in seconds. Legal values are between 0 and 900 (15 minutes); a default value of 60 (1 minute) is used if no value is specified. This value and sasl.login.refresh.buffer.seconds are both ignored if their sum exceeds the remaining lifetime of a credential. Currently applies only to OAUTHBEARER.
Type: short Default: 60 Valid Values: [0,...,900] Importance: low sasl.login.refresh.window.factor
Login refresh thread will sleep until the specified window factor relative to the credential's lifetime has been reached, at which time it will try to refresh the credential. Legal values are between 0.5 (50%) and 1.0 (100%) inclusive; a default value of 0.8 (80%) is used if no value is specified. Currently applies only to OAUTHBEARER.
Type: double Default: 0.8 Valid Values: [0.5,...,1.0] Importance: low sasl.login.refresh.window.jitter
The maximum amount of random jitter relative to the credential's lifetime that is added to the login refresh thread's sleep time. Legal values are between 0 and 0.25 (25%) inclusive; a default value of 0.05 (5%) is used if no value is specified. Currently applies only to OAUTHBEARER.
Type: double Default: 0.05 Valid Values: [0.0,...,0.25] Importance: low sasl.login.retry.backoff.max.ms
The (optional) value in milliseconds for the maximum wait between login attempts to the external authentication provider. Login uses an exponential backoff algorithm with an initial wait based on the sasl.login.retry.backoff.ms setting and will double in wait length between attempts up to a maximum wait length specified by the sasl.login.retry.backoff.max.ms setting. Currently applies only to OAUTHBEARER.
Type: long Default: 10000 (10 seconds) Valid Values: Importance: low sasl.login.retry.backoff.ms
The (optional) value in milliseconds for the initial wait between login attempts to the external authentication provider. Login uses an exponential backoff algorithm with an initial wait based on the sasl.login.retry.backoff.ms setting and will double in wait length between attempts up to a maximum wait length specified by the sasl.login.retry.backoff.max.ms setting. Currently applies only to OAUTHBEARER.
Type: long Default: 100 Valid Values: Importance: low sasl.oauthbearer.clock.skew.seconds
The (optional) value in seconds to allow for differences between the time of the OAuth/OIDC identity provider and the broker.
Type: int Default: 30 Valid Values: Importance: low sasl.oauthbearer.expected.audience
The (optional) comma-delimited setting for the broker to use to verify that the JWT was issued for one of the expected audiences. The JWT will be inspected for the standard OAuth "aud" claim and if this value is set, the broker will match the value from JWT's "aud" claim to see if there is an exact match. If there is no match, the broker will reject the JWT and authentication will fail.
Type: list Default: null Valid Values: Importance: low sasl.oauthbearer.expected.issuer
The (optional) setting for the broker to use to verify that the JWT was created by the expected issuer. The JWT will be inspected for the standard OAuth "iss" claim and if this value is set, the broker will match it exactly against what is in the JWT's "iss" claim. If there is no match, the broker will reject the JWT and authentication will fail.
Type: string Default: null Valid Values: Importance: low sasl.oauthbearer.jwks.endpoint.refresh.ms
The (optional) value in milliseconds for the broker to wait between refreshing its JWKS (JSON Web Key Set) cache that contains the keys to verify the signature of the JWT.
Type: long Default: 3600000 (1 hour) Valid Values: Importance: low sasl.oauthbearer.jwks.endpoint.retry.backoff.max.ms
The (optional) value in milliseconds for the maximum wait between attempts to retrieve the JWKS (JSON Web Key Set) from the external authentication provider. JWKS retrieval uses an exponential backoff algorithm with an initial wait based on the sasl.oauthbearer.jwks.endpoint.retry.backoff.ms setting and will double in wait length between attempts up to a maximum wait length specified by the sasl.oauthbearer.jwks.endpoint.retry.backoff.max.ms setting.
Type: long Default: 10000 (10 seconds) Valid Values: Importance: low sasl.oauthbearer.jwks.endpoint.retry.backoff.ms
The (optional) value in milliseconds for the initial wait between JWKS (JSON Web Key Set) retrieval attempts from the external authentication provider. JWKS retrieval uses an exponential backoff algorithm with an initial wait based on the sasl.oauthbearer.jwks.endpoint.retry.backoff.ms setting and will double in wait length between attempts up to a maximum wait length specified by the sasl.oauthbearer.jwks.endpoint.retry.backoff.max.ms setting.
Type: long Default: 100 Valid Values: Importance: low sasl.oauthbearer.scope.claim.name
The OAuth claim for the scope is often named "scope", but this (optional) setting can provide a different name to use for the scope included in the JWT payload's claims if the OAuth/OIDC provider uses a different name for that claim.
Type: string Default: scope Valid Values: Importance: low sasl.oauthbearer.sub.claim.name
The OAuth claim for the subject is often named "sub", but this (optional) setting can provide a different name to use for the subject included in the JWT payload's claims if the OAuth/OIDC provider uses a different name for that claim.
Type: string Default: sub Valid Values: Importance: low scheduled.rebalance.max.delay.ms
The maximum delay that is scheduled in order to wait for the return of one or more departed workers before rebalancing and reassigning their connectors and tasks to the group. During this period the connectors and tasks of the departed workers remain unassigned
Type: int Default: 300000 (5 minutes) Valid Values: [0,...,2147483647] Importance: low socket.connection.setup.timeout.max.ms
The maximum amount of time the client will wait for the socket connection to be established. The connection setup timeout will increase exponentially for each consecutive connection failure up to this maximum. To avoid connection storms, a randomization factor of 0.2 will be applied to the timeout resulting in a random range between 20% below and 20% above the computed value.
Type: long Default: 30000 (30 seconds) Valid Values: [0,...] Importance: low socket.connection.setup.timeout.ms
The amount of time the client will wait for the socket connection to be established. If the connection is not built before the timeout elapses, clients will close the socket channel. This value is the initial backoff value and will increase exponentially for each consecutive connection failure, up to the
socket.connection.setup.timeout.max.msvalue.Type: long Default: 10000 (10 seconds) Valid Values: [0,...] Importance: low ssl.cipher.suites
A list of cipher suites. This is a named combination of authentication, encryption, MAC and key exchange algorithm used to negotiate the security settings for a network connection using TLS or SSL network protocol. By default all the available cipher suites are supported.
Type: list Default: null Valid Values: Importance: low ssl.client.auth
Configures kafka broker to request client authentication. The following settings are common:
ssl.client.auth=requiredIf set to required client authentication is required.ssl.client.auth=requestedThis means client authentication is optional. unlike required, if this option is set client can choose not to provide authentication information about itselfssl.client.auth=noneThis means client authentication is not needed.
Type: string Default: none Valid Values: [required, requested, none] Importance: low ssl.endpoint.identification.algorithm
The endpoint identification algorithm to validate server hostname using server certificate.
Type: string Default: https Valid Values: Importance: low ssl.engine.factory.class
The class of type org.apache.kafka.common.security.auth.SslEngineFactory to provide SSLEngine objects. Default value is org.apache.kafka.common.security.ssl.DefaultSslEngineFactory. Alternatively, setting this to org.apache.kafka.common.security.ssl.CommonNameLoggingSslEngineFactory will log the common name of expired SSL certificates used by clients to authenticate at any of the brokers with log level INFO. Note that this will cause a tiny delay during establishment of new connections from mTLS clients to brokers due to the extra code for examining the certificate chain provided by the client. Note further that the implementation uses a custom truststore based on the standard Java truststore and thus might be considered a security risk due to not being as mature as the standard one.
Type: class Default: null Valid Values: Importance: low ssl.keymanager.algorithm
The algorithm used by key manager factory for SSL connections. Default value is the key manager factory algorithm configured for the Java Virtual Machine.
Type: string Default: SunX509 Valid Values: Importance: low ssl.secure.random.implementation
The SecureRandom PRNG implementation to use for SSL cryptography operations.
Type: string Default: null Valid Values: Importance: low ssl.trustmanager.algorithm
The algorithm used by trust manager factory for SSL connections. Default value is the trust manager factory algorithm configured for the Java Virtual Machine.
Type: string Default: PKIX Valid Values: Importance: low status.storage.partitions
The number of partitions used when creating the status storage topic
Type: int Default: 5 Valid Values: Positive number, or -1 to use the broker's default Importance: low status.storage.replication.factor
Replication factor used when creating the status storage topic
Type: short Default: 3 Valid Values: Positive number not larger than the number of brokers in the Kafka cluster, or -1 to use the broker's default Importance: low task.shutdown.graceful.timeout.ms
Amount of time to wait for tasks to shutdown gracefully. This is the total amount of time, not per task. All task have shutdown triggered, then they are waited on sequentially.
Type: long Default: 5000 (5 seconds) Valid Values: Importance: low topic.creation.enable
Whether to allow automatic creation of topics used by source connectors, when source connectors are configured with `topic.creation.` properties. Each task will use an admin client to create its topics and will not depend on the Kafka brokers to create topics automatically.
Type: boolean Default: true Valid Values: Importance: low topic.tracking.allow.reset
If set to true, it allows user requests to reset the set of active topics per connector.
Type: boolean Default: true Valid Values: Importance: low topic.tracking.enable
Enable tracking the set of active topics per connector during runtime.
Type: boolean Default: true Valid Values: Importance: low
Source Connector Configs
Below is the configuration of a source connector.
name
Globally unique name to use for this connector.
Type: string Default: Valid Values: non-empty string without ISO control characters Importance: high connector.class
Name or alias of the class for this connector. Must be a subclass of org.apache.kafka.connect.connector.Connector. If the connector is org.apache.kafka.connect.file.FileStreamSinkConnector, you can either specify this full name, or use "FileStreamSink" or "FileStreamSinkConnector" to make the configuration a bit shorter
Type: string Default: Valid Values: Importance: high tasks.max
Maximum number of tasks to use for this connector.
Type: int Default: 1 Valid Values: [1,...] Importance: high key.converter
Converter class used to convert between Kafka Connect format and the serialized form that is written to Kafka. This controls the format of the keys in messages written to or read from Kafka, and since this is independent of connectors it allows any connector to work with any serialization format. Examples of common formats include JSON and Avro.
Type: class Default: null Valid Values: A concrete subclass of org.apache.kafka.connect.storage.Converter, A class with a public, no-argument constructor Importance: low value.converter
Converter class used to convert between Kafka Connect format and the serialized form that is written to Kafka. This controls the format of the values in messages written to or read from Kafka, and since this is independent of connectors it allows any connector to work with any serialization format. Examples of common formats include JSON and Avro.
Type: class Default: null Valid Values: A concrete subclass of org.apache.kafka.connect.storage.Converter, A class with a public, no-argument constructor Importance: low header.converter
HeaderConverter class used to convert between Kafka Connect format and the serialized form that is written to Kafka. This controls the format of the header values in messages written to or read from Kafka, and since this is independent of connectors it allows any connector to work with any serialization format. Examples of common formats include JSON and Avro. By default, the SimpleHeaderConverter is used to serialize header values to strings and deserialize them by inferring the schemas.
Type: class Default: null Valid Values: A concrete subclass of org.apache.kafka.connect.storage.HeaderConverter, A class with a public, no-argument constructor Importance: low config.action.reload
The action that Connect should take on the connector when changes in external configuration providers result in a change in the connector's configuration properties. A value of 'none' indicates that Connect will do nothing. A value of 'restart' indicates that Connect should restart/reload the connector with the updated configuration properties.The restart may actually be scheduled in the future if the external configuration provider indicates that a configuration value will expire in the future.
Type: string Default: restart Valid Values: [none, restart] Importance: low transforms
Aliases for the transformations to be applied to records.
Type: list Default: "" Valid Values: non-null string, unique transformation aliases Importance: low predicates
Aliases for the predicates used by transformations.
Type: list Default: "" Valid Values: non-null string, unique predicate aliases Importance: low errors.retry.timeout
The maximum duration in milliseconds that a failed operation will be reattempted. The default is 0, which means no retries will be attempted. Use -1 for infinite retries.
Type: long Default: 0 Valid Values: Importance: medium errors.retry.delay.max.ms
The maximum duration in milliseconds between consecutive retry attempts. Jitter will be added to the delay once this limit is reached to prevent thundering herd issues.
Type: long Default: 60000 (1 minute) Valid Values: Importance: medium errors.tolerance
Behavior for tolerating errors during connector operation. 'none' is the default value and signals that any error will result in an immediate connector task failure; 'all' changes the behavior to skip over problematic records.
Type: string Default: none Valid Values: [none, all] Importance: medium errors.log.enable
If true, write each error and the details of the failed operation and problematic record to the Connect application log. This is 'false' by default, so that only errors that are not tolerated are reported.
Type: boolean Default: false Valid Values: Importance: medium errors.log.include.messages
Whether to include in the log the Connect record that resulted in a failure. For sink records, the topic, partition, offset, and timestamp will be logged. For source records, the key and value (and their schemas), all headers, and the timestamp, Kafka topic, Kafka partition, source partition, and source offset will be logged. This is 'false' by default, which will prevent record keys, values, and headers from being written to log files.
Type: boolean Default: false Valid Values: Importance: medium topic.creation.groups
Groups of configurations for topics created by source connectors
Type: list Default: "" Valid Values: non-null string, unique topic creation groups Importance: low exactly.once.support
Permitted values are requested, required. If set to "required", forces a preflight check for the connector to ensure that it can provide exactly-once semantics with the given configuration. Some connectors may be capable of providing exactly-once semantics but not signal to Connect that they support this; in that case, documentation for the connector should be consulted carefully before creating it, and the value for this property should be set to "requested". Additionally, if the value is set to "required" but the worker that performs preflight validation does not have exactly-once support enabled for source connectors, requests to create or validate the connector will fail.
Type: string Default: requested Valid Values: (case insensitive) [REQUIRED, REQUESTED] Importance: medium transaction.boundary
Permitted values are: poll, interval, connector. If set to 'poll', a new producer transaction will be started and committed for every batch of records that each task from this connector provides to Connect. If set to 'connector', relies on connector-defined transaction boundaries; note that not all connectors are capable of defining their own transaction boundaries, and in that case, attempts to instantiate a connector with this value will fail. Finally, if set to 'interval', commits transactions only after a user-defined time interval has passed.
Type: string Default: poll Valid Values: (case insensitive) [INTERVAL, POLL, CONNECTOR] Importance: medium transaction.boundary.interval.ms
If 'transaction.boundary' is set to 'interval', determines the interval for producer transaction commits by connector tasks. If unset, defaults to the value of the worker-level 'offset.flush.interval.ms' property. It has no effect if a different transaction.boundary is specified.
Type: long Default: null Valid Values: [0,...] Importance: low offsets.storage.topic
The name of a separate offsets topic to use for this connector. If empty or not specified, the worker’s global offsets topic name will be used. If specified, the offsets topic will be created if it does not already exist on the Kafka cluster targeted by this connector (which may be different from the one used for the worker's global offsets topic if the bootstrap.servers property of the connector's producer has been overridden from the worker's). Only applicable in distributed mode; in standalone mode, setting this property will have no effect.
Type: string Default: null Valid Values: non-empty string Importance: low
Sink Connector Configs
Below is the configuration of a sink connector.
name
Globally unique name to use for this connector.
Type: string Default: Valid Values: non-empty string without ISO control characters Importance: high connector.class
Name or alias of the class for this connector. Must be a subclass of org.apache.kafka.connect.connector.Connector. If the connector is org.apache.kafka.connect.file.FileStreamSinkConnector, you can either specify this full name, or use "FileStreamSink" or "FileStreamSinkConnector" to make the configuration a bit shorter
Type: string Default: Valid Values: Importance: high tasks.max
Maximum number of tasks to use for this connector.
Type: int Default: 1 Valid Values: [1,...] Importance: high topics
List of topics to consume, separated by commas
Type: list Default: "" Valid Values: Importance: high topics.regex
Regular expression giving topics to consume. Under the hood, the regex is compiled to a
java.util.regex.Pattern. Only one of topics or topics.regex should be specified.Type: string Default: "" Valid Values: valid regex Importance: high key.converter
Converter class used to convert between Kafka Connect format and the serialized form that is written to Kafka. This controls the format of the keys in messages written to or read from Kafka, and since this is independent of connectors it allows any connector to work with any serialization format. Examples of common formats include JSON and Avro.
Type: class Default: null Valid Values: A concrete subclass of org.apache.kafka.connect.storage.Converter, A class with a public, no-argument constructor Importance: low value.converter
Converter class used to convert between Kafka Connect format and the serialized form that is written to Kafka. This controls the format of the values in messages written to or read from Kafka, and since this is independent of connectors it allows any connector to work with any serialization format. Examples of common formats include JSON and Avro.
Type: class Default: null Valid Values: A concrete subclass of org.apache.kafka.connect.storage.Converter, A class with a public, no-argument constructor Importance: low header.converter
HeaderConverter class used to convert between Kafka Connect format and the serialized form that is written to Kafka. This controls the format of the header values in messages written to or read from Kafka, and since this is independent of connectors it allows any connector to work with any serialization format. Examples of common formats include JSON and Avro. By default, the SimpleHeaderConverter is used to serialize header values to strings and deserialize them by inferring the schemas.
Type: class Default: null Valid Values: A concrete subclass of org.apache.kafka.connect.storage.HeaderConverter, A class with a public, no-argument constructor Importance: low config.action.reload
The action that Connect should take on the connector when changes in external configuration providers result in a change in the connector's configuration properties. A value of 'none' indicates that Connect will do nothing. A value of 'restart' indicates that Connect should restart/reload the connector with the updated configuration properties.The restart may actually be scheduled in the future if the external configuration provider indicates that a configuration value will expire in the future.
Type: string Default: restart Valid Values: [none, restart] Importance: low transforms
Aliases for the transformations to be applied to records.
Type: list Default: "" Valid Values: non-null string, unique transformation aliases Importance: low predicates
Aliases for the predicates used by transformations.
Type: list Default: "" Valid Values: non-null string, unique predicate aliases Importance: low errors.retry.timeout
The maximum duration in milliseconds that a failed operation will be reattempted. The default is 0, which means no retries will be attempted. Use -1 for infinite retries.
Type: long Default: 0 Valid Values: Importance: medium errors.retry.delay.max.ms
The maximum duration in milliseconds between consecutive retry attempts. Jitter will be added to the delay once this limit is reached to prevent thundering herd issues.
Type: long Default: 60000 (1 minute) Valid Values: Importance: medium errors.tolerance
Behavior for tolerating errors during connector operation. 'none' is the default value and signals that any error will result in an immediate connector task failure; 'all' changes the behavior to skip over problematic records.
Type: string Default: none Valid Values: [none, all] Importance: medium errors.log.enable
If true, write each error and the details of the failed operation and problematic record to the Connect application log. This is 'false' by default, so that only errors that are not tolerated are reported.
Type: boolean Default: false Valid Values: Importance: medium errors.log.include.messages
Whether to include in the log the Connect record that resulted in a failure. For sink records, the topic, partition, offset, and timestamp will be logged. For source records, the key and value (and their schemas), all headers, and the timestamp, Kafka topic, Kafka partition, source partition, and source offset will be logged. This is 'false' by default, which will prevent record keys, values, and headers from being written to log files.
Type: boolean Default: false Valid Values: Importance: medium errors.deadletterqueue.topic.name
The name of the topic to be used as the dead letter queue (DLQ) for messages that result in an error when processed by this sink connector, or its transformations or converters. The topic name is blank by default, which means that no messages are to be recorded in the DLQ.
Type: string Default: "" Valid Values: Importance: medium errors.deadletterqueue.topic.replication.factor
Replication factor used to create the dead letter queue topic when it doesn't already exist.
Type: short Default: 3 Valid Values: Importance: medium errors.deadletterqueue.context.headers.enable
If true, add headers containing error context to the messages written to the dead letter queue. To avoid clashing with headers from the original record, all error context header keys, all error context header keys will start with
__connect.errors.Type: boolean Default: false Valid Values: Importance: medium