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https://issues.apache.org/jira/browse/KAFKA-10253?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Konstantin Lalafaryan updated KAFKA-10253:
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Summary: Kafka Connect gets into an infinite rebalance loop (was: Kafka
Connect gets into a rebalance loop)
> Kafka Connect gets into an infinite rebalance loop
> --------------------------------------------------
>
> Key: KAFKA-10253
> URL: https://issues.apache.org/jira/browse/KAFKA-10253
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 2.5.0
> Reporter: Konstantin Lalafaryan
> Priority: Blocker
>
> Hello everyone!
>
> We are running kafka-connect cluster (3 workers) and very often it gets into
> an infinite rebalance loop.
>
> {code:java}
> 2020-07-09 08:51:25,731 INFO [Worker clientId=connect-1, groupId=
> kafka-connect] Rebalance started
> (org.apache.kafka.connect.runtime.distributed.WorkerCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,731 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] (Re-)joining group
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,733 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Was selected to perform
> assignments, but do not have latest config found in sync request. Returning
> an empty configuration to trigger re-sync.
> (org.apache.kafka.connect.runtime.distributed.IncrementalCooperativeAssignor)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,735 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Successfully joined group with
> generation 305655831
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,735 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Joined group at generation
> 305655831 with protocol version 2 and got assignment: Assignment{error=1,
> leader='connect-1-0008abc5-a152-42fe-a697-a4a4641f72bb',
> leaderUrl='http://10.20.30.221:8083/', offset=12, connectorIds=[],
> taskIds=[], revokedConnectorIds=[], revokedTaskIds=[], delay=0} with
> rebalance delay: 0
> (org.apache.kafka.connect.runtime.distributed.DistributedHerder)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,735 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Rebalance started
> (org.apache.kafka.connect.runtime.distributed.WorkerCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,735 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] (Re-)joining group
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,736 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Was selected to perform
> assignments, but do not have latest config found in sync request. Returning
> an empty configuration to trigger re-sync.
> (org.apache.kafka.connect.runtime.distributed.IncrementalCooperativeAssignor)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,739 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Successfully joined group with
> generation 305655832
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,739 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Joined group at generation
> 305655832 with protocol version 2 and got assignment: Assignment{error=1,
> leader='connect-1-0008abc5-a152-42fe-a697-a4a4641f72bb',
> leaderUrl='http://10.20.30.221:8083/', offset=12, connectorIds=[],
> taskIds=[], revokedConnectorIds=[], revokedTaskIds=[], delay=0} with
> rebalance delay: 0
> (org.apache.kafka.connect.runtime.distributed.DistributedHerder)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,739 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Rebalance started
> (org.apache.kafka.connect.runtime.distributed.WorkerCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,739 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] (Re-)joining group
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,740 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Was selected to perform
> assignments, but do not have latest config found in sync request. Returning
> an empty configuration to trigger re-sync.
> (org.apache.kafka.connect.runtime.distributed.IncrementalCooperativeAssignor)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,742 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Successfully joined group with
> generation 305655833
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,742 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Joined group at generation
> 305655833 with protocol version 2 and got assignment: Assignment{error=1,
> leader='connect-1-0008abc5-a152-42fe-a697-a4a4641f72bb',
> leaderUrl='http://10.20.30.221:8083/', offset=12, connectorIds=[],
> taskIds=[], revokedConnectorIds=[], revokedTaskIds=[], delay=0} with
> rebalance delay: 0
> (org.apache.kafka.connect.runtime.distributed.DistributedHerder)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,742 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Rebalance started
> (org.apache.kafka.connect.runtime.distributed.WorkerCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,742 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] (Re-)joining group
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,744 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Was selected to perform
> assignments, but do not have latest config found in sync request. Returning
> an empty configuration to trigger re-sync.
> (org.apache.kafka.connect.runtime.distributed.IncrementalCooperativeAssignor)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,746 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Successfully joined group with
> generation 305655834
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,746 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Joined group at generation
> 305655834 with protocol version 2 and got assignment: Assignment{error=1,
> leader='connect-1-0008abc5-a152-42fe-a697-a4a4641f72bb',
> leaderUrl='http://10.20.30.221:8083/', offset=12, connectorIds=[],
> taskIds=[], revokedConnectorIds=[], revokedTaskIds=[], delay=0} with
> rebalance delay: 0
> (org.apache.kafka.connect.runtime.distributed.DistributedHerder)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,746 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Rebalance started
> (org.apache.kafka.connect.runtime.distributed.WorkerCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,746 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] (Re-)joining group
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,748 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Was selected to perform
> assignments, but do not have latest config found in sync request. Returning
> an empty configuration to trigger re-sync.
> (org.apache.kafka.connect.runtime.distributed.IncrementalCooperativeAssignor)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,750 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Successfully joined group with
> generation 305655835
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,750 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Joined group at generation
> 305655835 with protocol version 2 and got assignment: Assignment{error=1,
> leader='connect-1-0008abc5-a152-42fe-a697-a4a4641f72bb',
> leaderUrl='http://10.20.30.221:8083/', offset=12, connectorIds=[],
> taskIds=[], revokedConnectorIds=[], revokedTaskIds=[], delay=0} with
> rebalance delay: 0
> (org.apache.kafka.connect.runtime.distributed.DistributedHerder)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,750 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Rebalance started
> (org.apache.kafka.connect.runtime.distributed.WorkerCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,750 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] (Re-)joining group
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,751 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Was selected to perform
> assignments, but do not have latest config found in sync request. Returning
> an empty configuration to trigger re-sync.
> (org.apache.kafka.connect.runtime.distributed.IncrementalCooperativeAssignor)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,754 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Successfully joined group with
> generation 305655836
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,754 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Joined group at generation
> 305655836 with protocol version 2 and got assignment: Assignment{error=1,
> leader='connect-1-0008abc5-a152-42fe-a697-a4a4641f72bb',
> leaderUrl='http://10.20.30.221:8083/', offset=12, connectorIds=[],
> taskIds=[], revokedConnectorIds=[], revokedTaskIds=[], delay=0} with
> rebalance delay: 0
> (org.apache.kafka.connect.runtime.distributed.DistributedHerder)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,754 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Rebalance started
> (org.apache.kafka.connect.runtime.distributed.WorkerCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,754 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] (Re-)joining group
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,755 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Was selected to perform
> assignments, but do not have latest config found in sync request. Returning
> an empty configuration to trigger re-sync.
> (org.apache.kafka.connect.runtime.distributed.IncrementalCooperativeAssignor)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,757 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Successfully joined group with
> generation 305655837
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,757 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Joined group at generation
> 305655837 with protocol version 2 and got assignment: Assignment{error=1,
> leader='connect-1-0008abc5-a152-42fe-a697-a4a4641f72bb',
> leaderUrl='http://10.20.30.221:8083/', offset=12, connectorIds=[],
> taskIds=[], revokedConnectorIds=[], revokedTaskIds=[], delay=0} with
> rebalance delay: 0
> (org.apache.kafka.connect.runtime.distributed.DistributedHerder)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,757 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Rebalance started
> (org.apache.kafka.connect.runtime.distributed.WorkerCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,757 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] (Re-)joining group
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,759 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Was selected to perform
> assignments, but do not have latest config found in sync request. Returning
> an empty configuration to trigger re-sync.
> (org.apache.kafka.connect.runtime.distributed.IncrementalCooperativeAssignor)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,761 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Successfully joined group with
> generation 305655838
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,761 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Joined group at generation
> 305655838 with protocol version 2 and got assignment: Assignment{error=1,
> leader='connect-1-0008abc5-a152-42fe-a697-a4a4641f72bb',
> leaderUrl='http://10.20.30.221:8083/', offset=12, connectorIds=[],
> taskIds=[], revokedConnectorIds=[], revokedTaskIds=[], delay=0} with
> rebalance delay: 0
> (org.apache.kafka.connect.runtime.distributed.DistributedHerder)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,761 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Rebalance started
> (org.apache.kafka.connect.runtime.distributed.WorkerCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,761 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] (Re-)joining group
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,763 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Was selected to perform
> assignments, but do not have latest config found in sync request. Returning
> an empty configuration to trigger re-sync.
> (org.apache.kafka.connect.runtime.distributed.IncrementalCooperativeAssignor)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,766 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Successfully joined group with
> generation 305655839
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,766 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Joined group at generation
> 305655839 with protocol version 2 and got assignment: Assignment{error=1,
> leader='connect-1-0008abc5-a152-42fe-a697-a4a4641f72bb',
> leaderUrl='http://10.20.30.221:8083/', offset=12, connectorIds=[],
> taskIds=[], revokedConnectorIds=[], revokedTaskIds=[], delay=0} with
> rebalance delay: 0
> (org.apache.kafka.connect.runtime.distributed.DistributedHerder)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,766 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Rebalance started
> (org.apache.kafka.connect.runtime.distributed.WorkerCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,766 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] (Re-)joining group
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,768 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Was selected to perform
> assignments, but do not have latest config found in sync request. Returning
> an empty configuration to trigger re-sync.
> (org.apache.kafka.connect.runtime.distributed.IncrementalCooperativeAssignor)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,771 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Successfully joined group with
> generation 305655840
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)
> [DistributedHerder-connect-1-1] 2020-07-09 08:51:25,771 INFO [Worker
> clientId=connect-1, groupId= kafka-connect] Joined group at generation
> {code}
>
> Any feedback is appreciated!
> Thanks!
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