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https://issues.apache.org/jira/browse/FLINK-27848?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias Pohl updated FLINK-27848:
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Affects Version/s: 1.16.1
1.17.0
> ZooKeeperLeaderElectionDriver keeps writing leader information, using up zxid
> -----------------------------------------------------------------------------
>
> Key: FLINK-27848
> URL: https://issues.apache.org/jira/browse/FLINK-27848
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
> Affects Versions: 1.15.0, 1.17.0, 1.16.1
> Reporter: Xintong Song
> Assignee: Matthias Pohl
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.15.1
>
>
> After a leadership change, the new leader may keeps writing its information
> (which is identical) to ZK, causing the zxid on ZK quickly used up.
> The problem is that, in
> {{ZooKeeperLeaderElectionDriver#retrieveLeaderInformationFromZooKeeper}},
> {{leaderElectionEventHandler.onLeaderInformationChange(LeaderInformation.empty())}}
> is called no matter {{childData}} is {{null}} or not. In case of non-null,
> this will cause the driver keeps re-writing the leader information to ZK.
> The problem was introduced in FLINK-24038, and only affects the legacy
> {{ZooKeeperHaServices}}. Thus, only 1.15 are affected.
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