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https://issues.apache.org/jira/browse/SOLR-11993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16383094#comment-16383094
 ] 

ASF subversion and git services commented on SOLR-11993:
--------------------------------------------------------

Commit c663d2c736e393b9e57f4e434254912899c3a611 in lucene-solr's branch 
refs/heads/branch_6_6 from [~steve_rowe]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=c663d2c ]

SOLR-11993: LeaderInitiatedRecoveryThread does not retry on UnknownHostException


> LeaderInitiatedRecoveryThread does not retry on UnknownHostException
> --------------------------------------------------------------------
>
>                 Key: SOLR-11993
>                 URL: https://issues.apache.org/jira/browse/SOLR-11993
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: SolrCloud
>    Affects Versions: 5.5.5, 7.2, 6.6.2
>            Reporter: Shalin Shekhar Mangar
>            Priority: Major
>             Fix For: 6.6.3
>
>         Attachments: SOLR-11993.patch
>
>
> The LIR thread has a whitelist of exceptions on which it retries. It should 
> include UnknownHostException to avoid cases where a flaky DNS server (AWS 
> Route53!) can cause replicas to be stuck in "down" state until restarted.



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