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https://issues.apache.org/jira/browse/SOLR-13410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16833426#comment-16833426
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Kesharee Nandan Vishwakarma commented on SOLR-13410:
----------------------------------------------------
Hi [~ichattopadhyaya],
It seems two test cases in OverseerRolesTest are interfering with each other,
since they are running on the same cluster.
OverseerCollectionConfigSetProcessor.getLeaderNode(zkClient()) returns null at
times due to that. We can include test cases for this fix in the existing test
testOverseerRole. Please refer to the patch for the same.
We can also try using a separate cluster for this or including huge wait time
before each test can also help.
> Designated overseer not able to become overseer quickly
> --------------------------------------------------------
>
> Key: SOLR-13410
> URL: https://issues.apache.org/jira/browse/SOLR-13410
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: SolrCloud
> Affects Versions: master (9.0)
> Reporter: Kesharee Nandan Vishwakarma
> Assignee: Ishan Chattopadhyaya
> Priority: Major
> Fix For: 8.1
>
> Attachments: SOLR-13410.patch, SOLR-13410.patch, SOLR-13410.patch,
> overseerElection.log
>
>
> Whenever a designated overseer node is restarted and overseer role is added
> back if a designated node is not overseer leader following tasks take place:
> 1. one by one nodes from electionNodes list become leader and ask designated
> node `to come join election at head`
> 2. current overseer node Fires Quit command and exits from Overseer Loop
> 3. Next node from `Overseer Loop` becomes leader repeats steps 1,2 until
> designated overseer node becomes the leader
> Problem with above flow: OverseerNodePrioritizer is not able to add
> `designated node` at the head of electionNodes list
> Steps to reproduce:
> # Setup solrcloud with 5 nodes, including one designated overseer
> # Restart overseer container
> Attached relevant logs
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