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https://issues.apache.org/jira/browse/SOLR-7109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14899971#comment-14899971
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Mark Miller commented on SOLR-7109:
-----------------------------------

FYI, we found an issue with this improvement because of how it tries to ensure 
only a legal replica can put anoither replica into LIR. Working on a fix here 
in SOLR-8069.

> Indexing threads stuck during network partition can put leader into down state
> ------------------------------------------------------------------------------
>
>                 Key: SOLR-7109
>                 URL: https://issues.apache.org/jira/browse/SOLR-7109
>             Project: Solr
>          Issue Type: Bug
>          Components: SolrCloud
>    Affects Versions: 4.10.3, 5.0
>            Reporter: Shalin Shekhar Mangar
>            Assignee: Shalin Shekhar Mangar
>             Fix For: 5.1, Trunk
>
>         Attachments: SOLR-7109.patch, SOLR-7109.patch
>
>
> I found this recently while running some Jepsen tests. I found that some 
> threads get stuck on zk operations for a long time in 
> ZkController.updateLeaderInitiatedRecoveryState method and when they wake up 
> they go ahead with setting the LIR state to down. But in the mean time, new 
> leader has been elected and sometimes you'd get into a state where the leader 
> itself is put into recovery causing the shard to reject all writes.



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