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https://issues.apache.org/jira/browse/SOLR-17077?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17793333#comment-17793333
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ASF subversion and git services commented on SOLR-17077:
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Commit 5f7c68514416ffdc52b164799f378b3a16fe7f1f in solr's branch
refs/heads/main from Pierre Salagnac
[ https://gitbox.apache.org/repos/asf?p=solr.git;h=5f7c6851441 ]
SOLR-17077: Don't cancel twice when rejoining shard leader election (#2084)
When a shard rejoins leader election, leave previous election only once to save
unneeded calls to Zookeeper. The prior behavior was noisy and less efficient;
a bug perhaps albeit without real consequence.
Co-authored-by: Pierre Salagnac <[email protected]>
> When rejoining shard leader election, we try to leave the election twice
> ------------------------------------------------------------------------
>
> Key: SOLR-17077
> URL: https://issues.apache.org/jira/browse/SOLR-17077
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: SolrCloud
> Affects Versions: 8.11.2, 9.4
> Reporter: Pierre Salagnac
> Priority: Minor
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> When rejoining leader election, we tries to delete the leader election twice
> in Zookeeper.
> This has no impact on the outcome of the leader election and this does not
> cause other failure. This is visible in logs (see bellow).
>
> *Scénario details*
> Method {{ZkController.rejoinShardLeaderElection()}} leaves the election by
> removing the sequential election node and the leader registration node. This
> is done directly from there by invoking {{{}prevContext.cancelElection(){}}}.
> Then {{LeaderElector.retryElection()}} does that again
> (this.context.cancelElection()) but the second time around always fails as
> the Zookeeper nodes were already removed by the first attempt.
> Following log line is logged each time we invoke {{REJOINELECTION}} of a
> shard.
> _"No version found for ephemeral leader parent node, won't remove previous
> leader registration."_
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