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From Sinóros-Szabó Péter (JIRA) <j...@apache.org>
Subject [jira] [Updated] (KAFKA-4478) Deadlock between heartbeat executor, group metadata manager and request handler
Date Fri, 02 Dec 2016 13:01:58 GMT

     [ https://issues.apache.org/jira/browse/KAFKA-4478?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sinóros-Szabó Péter updated KAFKA-4478:
---------------------------------------
    Labels: reliability  (was: )

> 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
>
> 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 {{java.io.IOException:
Connection to 1 was disconnected before the response was read}} 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:
> 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"



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