[jira] [Commented] (SOLR-16414) Race condition in PRS state updates

["ASF subversion and git services (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-16414?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17677741#comment-17677741 ] 

ASF subversion and git services commented on SOLR-16414:
--------------------------------------------------------

Commit deb9e2439957dd42c349fc7fe2529d9fb63bd54d in solr's branch refs/heads/branch_9_1 from Ishan Chattopadhyaya
[ https://gitbox.apache.org/repos/asf?p=solr.git;h=deb9e243995 ]

SOLR-16622, SOLR-16414: simplified code / bugfix for a node restart not working correctly


> Race condition in PRS state updates
> -----------------------------------
>
>                 Key: SOLR-16414
>                 URL: https://issues.apache.org/jira/browse/SOLR-16414
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Noble Paul
>            Assignee: Noble Paul
>            Priority: Major
>             Fix For: 9.1
>
>          Time Spent: 40m
>  Remaining Estimate: 0h
>
> For PRS collections the individual states are potentially updated from individual nodes and sometimes from overseer too. it's possible that
>  
>  # OP1 is sent to overseer at T1
>  # OP2 is executed in the node itself at T2
>  
> Because we cannot guarantee that the OP1 sent to overseer may execute before OP2 tyhe final state will be the result of OP1 which is incorrect and can lead to errors .
> The solution is to never do any PRS writes from overseer. 



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