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https://issues.apache.org/jira/browse/ACCUMULO-2532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13947258#comment-13947258
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Keith Turner commented on ACCUMULO-2532:
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the intent of the reserve file was to esnure only one thread uses the tmp dir.
In hadoop 1 I think if two threads try to create the same dir at around the
same time they will both report success. With a file only one would report
success.
> FileUtil expects instance.dfs.dir in tmpDir path
> ------------------------------------------------
>
> Key: ACCUMULO-2532
> URL: https://issues.apache.org/jira/browse/ACCUMULO-2532
> Project: Accumulo
> Issue Type: Sub-task
> Components: master, tserver
> Reporter: Josh Elser
> Assignee: Josh Elser
> Priority: Critical
> Fix For: 1.6.0
>
>
> FileUtil#cleanupIndexOp(AccumuloConfiguration, Path, VolumeManager,
> ArrayList) checks that the temporary directory Path it was given ends with
> the value of instance.dfs.dir and "/tmp".
> instance.dfs.dir is no longer appended to each volume, so this check is
> likely wrong and result in tmp directories not being cleaned up properly.
> This also necessitates a unit test to prevent from happening again.
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