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Posted to dev@kafka.apache.org by "Jason Gustafson (JIRA)" <ji...@apache.org> on 2016/12/03 00:12:58 UTC
[jira] [Resolved] (KAFKA-4478) Deadlock between heartbeat executor,
group metadata manager and request handler
[ https://issues.apache.org/jira/browse/KAFKA-4478?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jason Gustafson resolved KAFKA-4478.
------------------------------------
Resolution: Duplicate
Resolving this as a duplicate. Please reopen if you think this is a mistake.
> Deadlock between heartbeat executor, group metadata manager and request handler
> -------------------------------------------------------------------------------
>
> Key: KAFKA-4478
> URL: https://issues.apache.org/jira/browse/KAFKA-4478
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 0.10.1.0
> Reporter: Sinóros-Szabó Péter
> Labels: reliability
> Attachments: broker-0.controller.log.2016-12-01-21, broker-0.server.log.2016-12-01-21, kafka-1.jstack, kafka-1.server.log.2016-12-01-21, kafka-1.state-change.log
>
>
> We are running a 0.10.1.0 cluster with 3 brokers with ids 0, 1 and 2.
> At about 2016-12-01 21:29 something happened with broker 1 and since then I see
> {code}
> java.io.IOException: Connection to 1 was disconnected before the response was read
> {code}
> errors in the logs of broker 0 and 2. Clients were unable to produce to broker 1's partitions and JMX counters indicates underreplicated partitions.
> I took a stack trace on broker-1 and I see that there is a deadlock between the JVM threads:
> {code}
> Found one Java-level deadlock:
> =============================
> "executor-Heartbeat":
> waiting to lock monitor 0x00007ffa24029df8 (object 0x00000000cc52fe70, a kafka.coordinator.GroupMetadata),
> which is held by "group-metadata-manager-0"
> "group-metadata-manager-0":
> waiting to lock monitor 0x00007ff9900a83a8 (object 0x00000000ca8b0820, a java.util.LinkedList),
> which is held by "kafka-request-handler-7"
> "kafka-request-handler-7":
> waiting to lock monitor 0x00007ffa24029df8 (object 0x00000000cc52fe70, a kafka.coordinator.GroupMetadata),
> which is held by "group-metadata-manager-0"
> {code}
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