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https://issues.apache.org/jira/browse/HBASE-21342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16661336#comment-16661336
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Mike Drob commented on HBASE-21342:
-----------------------------------
I didn't drop the branch-1 versions, they were never in the fix version list.
They're in affects version still.
Paused my backports to consult with Stack offline about wether it's safe to
commit to branch-2.1 right now, since I know he's prepping for a release. Will
likely spin off separate backport issues.
> FileSystem in use may get closed by other bulk load call in secure bulkLoad
> ----------------------------------------------------------------------------
>
> Key: HBASE-21342
> URL: https://issues.apache.org/jira/browse/HBASE-21342
> Project: HBase
> Issue Type: Bug
> Affects Versions: 3.0.0, 2.1.0, 1.5.0, 1.3.3, 1.4.4, 2.0.1, 1.2.7
> Reporter: mazhenlin
> Assignee: mazhenlin
> Priority: Major
> Fix For: 3.0.0, 2.2.0
>
> Attachments: 21342.v1.txt, HBASE-21342.002.patch,
> HBASE-21342.003.patch, HBASE-21342.004.patch, HBASE-21342.005.patch,
> HBASE-21342.006.patch, HBASE-21342.007.patch, race.patch
>
>
> As mentioned in [HBASE-15291|#HBASE-15291], there is a race condition. If
> Two secure bulkload calls from the same UGI into two different regions and
> one region finishes earlier, it will close the bulk load fs, and the other
> region will fail.
>
> Another case would be more serious. The FileSystem.close() function needs two
> synchronized variables : CACHE and deleteOnExit. If one region calls
> FileSystem.closeAllForUGI ( in SecureBulkLoadManager.cleanupBulkLoad) while
> another region is trying to close srcFS ( in
> SecureBulkLoadListener.closeSrcFs) , can cause deadlock here.
>
> I have wrote a UT for this and fixed it using reference counter.
>
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