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https://issues.apache.org/jira/browse/SOLR-6969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14340632#comment-14340632
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Anshum Gupta commented on SOLR-6969:
------------------------------------
This adds a dependency for solr/core so I'm not sure if we should be
backporting this to a bug fix release:
{code}
<dependency org="commons-collections" name="commons-collections"
rev="${/commons-collections/commons-collections}" conf="compile.hadoop"/>
{code}
What's the general practice?
> When opening an HDFSTransactionLog for append we must first attempt to
> recover it's lease to prevent data loss.
> ---------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-6969
> URL: https://issues.apache.org/jira/browse/SOLR-6969
> Project: Solr
> Issue Type: Bug
> Components: hdfs
> Reporter: Mark Miller
> Assignee: Mark Miller
> Priority: Critical
> Fix For: 5.0, Trunk
>
> Attachments: SOLR-6969-4.10.4-backport.patch, SOLR-6969.patch,
> SOLR-6969.patch
>
>
> This can happen after a hard crash and restart. The current workaround is to
> stop and wait it out and start again. We should retry and wait a given amount
> of time as we do when we detect safe mode though.
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