[jira] [Resolved] (SOLR-16783) Race condition deleting clusterstate.json can prevent Solr from starting

["Tomas Eduardo Fernandez Lobbe (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-16783?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tomas Eduardo Fernandez Lobbe resolved SOLR-16783.
--------------------------------------------------
    Fix Version/s: main (10.0)
                   9.3
                   9.2.2
       Resolution: Fixed

> Race condition deleting clusterstate.json can prevent Solr from starting
> ------------------------------------------------------------------------
>
>                 Key: SOLR-16783
>                 URL: https://issues.apache.org/jira/browse/SOLR-16783
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Tomas Eduardo Fernandez Lobbe
>            Priority: Major
>             Fix For: main (10.0), 9.3, 9.2.2
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> ZkController attempts to delete the deprecated {{clusterstate.json}} file from ZooKeeper if empty on startup. If multiple instances attempt to delete it at the same time one of them will succeed and the others will fail with `NoNodeException`, which bubbles up and causes the instant to fail startup, requiring another restart



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