[jira] [Commented] (SOLR-5859) Harden the Overseer restart mechanism

["Mikhail Khludnev (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-5859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16437946#comment-16437946 ] 

Mikhail Khludnev commented on SOLR-5859:
----------------------------------------

[~noble.paul], I want to clarify 
https://github.com/apache/lucene-solr/commit/3fd292234166105f96fcb5acd3999c9c2abff737#diff-9ed614eee66b9e685d73446b775dc043R287
{quote}
        //do this in a separate thread because any wait is interrupted in this main thread
        new Thread(this::checkIfIamStillLeader, "OverseerExitThread").start();
{quote}
Can't we clean interrupt flag with {{Thread.interrupted()}} and avoid spawning new thread ?

> Harden the Overseer restart mechanism
> -------------------------------------
>
>                 Key: SOLR-5859
>                 URL: https://issues.apache.org/jira/browse/SOLR-5859
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Noble Paul
>            Assignee: Noble Paul
>            Priority: Major
>             Fix For: 4.8, 6.0
>
>         Attachments: SOLR-5859.patch, SOLR-5859.patch, SOLR-5859.patch, SOLR-5859.patch
>
>
> SOLR-5476 depends on Overseer restart.The current strategy is to remove the zk node for leader election and wait for STATUS_UPDATE_DELAY +100 ms and  start the new overseer.
> Though overseer ops are short running,  it is not a 100% foolproof strategy because if an operation takes longer than the wait period there can be race condition. 



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