Name Description Type Default Valid Values Importance
group.idA unique string that identifies the Connect cluster group this worker belongs to.stringhigh
internal.key.converterConverter class for internal key Connect data that implements the Converter interface. Used for converting data like offsets and configs.classhigh
internal.value.converterConverter class for offset value Connect data that implements the Converter interface. Used for converting data like offsets and configs.classhigh
key.converterConverter class for key Connect data that implements the Converter interface.classhigh
value.converterConverter class for value Connect data that implements the Converter interface.classhigh
bootstrap.serversA 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).list[localhost:9092]high
clusterID for this cluster, which is used to provide a namespace so multiple Kafka Connect clusters or instances may co-exist while sharing a single Kafka cluster.stringconnecthigh
heartbeat.interval.msThe 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.int3000high
session.timeout.msThe timeout used to detect failures when using Kafka's group management facilities.int30000high
ssl.key.passwordThe password of the private key in the key store file. This is optional for client.passwordnullhigh
ssl.keystore.locationThe location of the key store file. This is optional for client and can be used for two-way authentication for client.stringnullhigh
ssl.keystore.passwordThe store password for the key store file.This is optional for client and only needed if ssl.keystore.location is configured. passwordnullhigh
ssl.truststore.locationThe location of the trust store file. stringnullhigh
ssl.truststore.passwordThe password for the trust store file. passwordnullhigh
connections.max.idle.msClose idle connections after the number of milliseconds specified by this config.long540000medium
receive.buffer.bytesThe size of the TCP receive buffer (SO_RCVBUF) to use when reading data.int32768[0,...]medium
request.timeout.msThe 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.int40000[0,...]medium
sasl.kerberos.service.nameThe Kerberos principal name that Kafka runs as. This can be defined either in Kafka's JAAS config or in Kafka's config.stringnullmedium
security.protocolProtocol used to communicate with brokers. Valid values are: PLAINTEXT, SSL, SASL_PLAINTEXT, SASL_SSL.stringPLAINTEXTmedium
send.buffer.bytesThe size of the TCP send buffer (SO_SNDBUF) to use when sending data.int131072[0,...]medium
ssl.enabled.protocolsThe list of protocols enabled for SSL connections.list[TLSv1.2, TLSv1.1, TLSv1]medium
ssl.keystore.typeThe file format of the key store file. This is optional for client.stringJKSmedium
ssl.protocolThe SSL protocol used to generate the SSLContext. Default setting is TLS, which is fine for most cases. Allowed values in recent JVMs are TLS, TLSv1.1 and TLSv1.2. SSL, SSLv2 and SSLv3 may be supported in older JVMs, but their usage is discouraged due to known security vulnerabilities.stringTLSmedium
ssl.providerThe name of the security provider used for SSL connections. Default value is the default security provider of the JVM.stringnullmedium
ssl.truststore.typeThe file format of the trust store file.stringJKSmedium
worker.sync.timeout.msWhen 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.int3000medium
worker.unsync.backoff.msWhen 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.int300000medium
client.idAn 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.string""low
metadata.max.age.msThe 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.long300000[0,...]low
metric.reportersA list of classes to use as metrics reporters. Implementing the MetricReporter interface allows plugging in classes that will be notified of new metric creation. The JmxReporter is always included to register JMX statistics.list[]low
metrics.num.samplesThe number of samples maintained to compute metrics.int2[1,...]low
metrics.sample.window.msThe number of samples maintained to compute metrics.long30000[0,...]low
offset.flush.interval.msInterval at which to try committing offsets for tasks.long60000low
offset.flush.timeout.msMaximum 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.long5000low
reconnect.backoff.msThe 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 requests sent by the consumer to the broker.long50[0,...]low
rest.advertised.host.nameIf this is set, this is the hostname that will be given out to other workers to connect to.stringnulllow
rest.advertised.portIf this is set, this is the port that will be given out to other workers to connect to.intnulllow
rest.host.nameHostname for the REST API. If this is set, it will only bind to this interface.stringnulllow
rest.portPort for the REST API to listen on.int8083low
retry.backoff.msThe amount of time to wait before attempting to retry a failed fetch request to a given topic partition. This avoids repeated fetching-and-failing in a tight loop.long100[0,...]low
sasl.kerberos.kinit.cmdKerberos kinit command path.string/usr/bin/kinitlow
sasl.kerberos.min.time.before.reloginLogin thread sleep time between refresh attempts.long60000low
sasl.kerberos.ticket.renew.jitterPercentage of random jitter added to the renewal time.double0.05low
sasl.kerberos.ticket.renew.window.factorLogin 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.double0.8low
ssl.cipher.suitesA 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.listnulllow
ssl.endpoint.identification.algorithmThe endpoint identification algorithm to validate server hostname using server certificate. stringnulllow
ssl.keymanager.algorithmThe algorithm used by key manager factory for SSL connections. Default value is the key manager factory algorithm configured for the Java Virtual Machine.stringSunX509low
ssl.trustmanager.algorithmThe algorithm used by trust manager factory for SSL connections. Default value is the trust manager factory algorithm configured for the Java Virtual Machine.stringPKIXlow
task.shutdown.graceful.timeout.msAmount 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.long5000low