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https://issues.apache.org/jira/browse/HDFS-3956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13459169#comment-13459169
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Eli Collins commented on HDFS-3956:
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+1 looks great
> QJM: purge temporary files when no longer within retention period
> -----------------------------------------------------------------
>
> Key: HDFS-3956
> URL: https://issues.apache.org/jira/browse/HDFS-3956
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha
> Affects Versions: QuorumJournalManager (HDFS-3077)
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Minor
> Attachments: hdfs-3956.txt
>
>
> After doing a bunch of fault testing, I noticed that the JNs had a bunch of
> temporary files left around in their journal directories which were no longer
> within the retention period. For example, if a JN crashes in the middle of
> recovery, it can leave around a file like {{edits_inprogress_123.epoch=10}}.
> These files are handy to keep around for forensics/debugging while they are
> still in their retention period, but we should not leave them forever. The
> normal purging policy should apply.
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