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https://issues.apache.org/jira/browse/KAFKA-4306?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15586568#comment-15586568
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Shikhar Bhushan commented on KAFKA-4306:
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KAFKA-4154 is another issue relating to broker-unavailability preventing
shutdown, but I believe there it's because it failed to finish startup in the
first place.
> Connect workers won't shut down if brokers are not available
> ------------------------------------------------------------
>
> Key: KAFKA-4306
> URL: https://issues.apache.org/jira/browse/KAFKA-4306
> Project: Kafka
> Issue Type: Bug
> Components: KafkaConnect
> Affects Versions: 0.10.1.0
> Reporter: Gwen Shapira
> Assignee: Ewen Cheslack-Postava
>
> If brokers are not available and we try to shut down connect workers, sink
> connectors will be stuck in a loop retrying to commit offsets:
> 2016-10-17 09:39:14,907] INFO Marking the coordinator 192.168.1.9:9092 (id:
> 2147483647 rack: null) dead for group connect-dump-kafka-config1
> (org.apache.kafka.clients.consumer.internals.AbstractCoordinator:600)
> [2016-10-17 09:39:14,907] ERROR Commit of
> WorkerSinkTask{id=dump-kafka-config1-0} offsets threw an unexpected
> exception: (org.apache.kafka.connect.runtime.WorkerSinkTask:194)
> org.apache.kafka.clients.consumer.RetriableCommitFailedException: Offset
> commit failed with a retriable exception. You should retry committing offsets.
> Caused by:
> org.apache.kafka.common.errors.GroupCoordinatorNotAvailableException
> We should probably limit the number of retries before doing "unclean"
> shutdown.
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