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https://issues.apache.org/jira/browse/HBASE-13331?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14378858#comment-14378858
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Elliott Clark commented on HBASE-13331:
---------------------------------------
When I went to open the daughter region that failed. The daughter region
contained references to the parent. HMaster had deleted the parent because it
couldn't open the daughter region and assumed that was because it didn't exist.
That's because the best way to signal that a directory doesn't exist is
obviously to throw a generic exception.
I added the !FSUtils.isExists to explicitly handle the case of the janitor not
running before there is another split that removes the daughter region.
> Exceptions from DFS client can cause CatalogJanitor to delete referenced files
> ------------------------------------------------------------------------------
>
> Key: HBASE-13331
> URL: https://issues.apache.org/jira/browse/HBASE-13331
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 1.0.0, 0.98.12
> Reporter: Elliott Clark
> Assignee: Elliott Clark
> Priority: Blocker
> Fix For: 2.0.0, 1.0.1, 1.1.0, 0.98.13
>
> Attachments: HBASE-13331.patch
>
>
> CatalogJanitor#checkDaughterInFs assumes that there are no references
> whenever HRegionFileSystem.openRegionFromFileSystem throws IOException. Well
> Hadoop and HBase throw IOExceptions whenever someone looks in their general
> direction.
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