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https://issues.apache.org/jira/browse/SOLR-12187?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16441273#comment-16441273
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Lucene/Solr QA commented on SOLR-12187:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | {color:red} patch {color} | {color:red} 0m 5s{color}
| {color:red} SOLR-12187 does not apply to master. Rebase required? Wrong
Branch? See
https://wiki.apache.org/solr/HowToContribute#Creating_the_patch_file for help.
{color} |
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|| Subsystem || Report/Notes ||
| JIRA Issue | SOLR-12187 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12919360/SOLR-12187.patch |
| Console output |
https://builds.apache.org/job/PreCommit-SOLR-Build/59/console |
| Powered by | Apache Yetus 0.7.0 http://yetus.apache.org |
This message was automatically generated.
> Replica should watch clusterstate and unload itself if its entry is removed
> ---------------------------------------------------------------------------
>
> Key: SOLR-12187
> URL: https://issues.apache.org/jira/browse/SOLR-12187
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Cao Manh Dat
> Assignee: Cao Manh Dat
> Priority: Major
> Attachments: SOLR-12187.patch, SOLR-12187.patch, SOLR-12187.patch,
> SOLR-12187.patch, SOLR-12187.patch, SOLR-12187.patch
>
>
> With the introduction of autoscaling framework, we have seen an increase in
> the number of issues related to the race condition between delete a replica
> and other stuff.
> Case 1: DeleteReplicaCmd failed to send UNLOAD request to a replica,
> therefore, forcefully remove its entry from clusterstate, but the replica
> still function normally and be able to become a leader -> SOLR-12176
> Case 2:
> * DeleteReplicaCmd enqueue a DELETECOREOP (without sending a request to
> replica because the node is not live)
> * The node start and the replica get loaded
> * DELETECOREOP has not processed hence the replica still present in
> clusterstate --> pass checkStateInZk
> * DELETECOREOP is executed, DeleteReplicaCmd finished
> ** result 1: the replica start recovering, finish it and publish itself as
> ACTIVE --> state of the replica is ACTIVE
> ** result 2: the replica throw an exception (probably: NPE)
> --> state of the replica is DOWN, not join leader election
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