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https://issues.apache.org/jira/browse/HBASE-15101?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15108061#comment-15108061
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ramkrishna.s.vasudevan commented on HBASE-15101:
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bq. I think we need some cleanup in these area.
In my previous patches with HBASE-13082 I added a TODO to clean it up. We can
check that once and do the need ful cleanup.
> Leaked References to StoreFile.Reader after HBASE-13082
> -------------------------------------------------------
>
> Key: HBASE-15101
> URL: https://issues.apache.org/jira/browse/HBASE-15101
> Project: HBase
> Issue Type: Bug
> Components: HFile, io
> Affects Versions: 2.0.0
> Reporter: deepankar
> Assignee: deepankar
> Priority: Critical
> Attachments: HBASE-15101-v1.patch, HBASE-15101-v2.patch,
> HBASE-15101-v3.patch, HBASE-15101-v4.patch, HBASE-15101.patch
>
>
> We observed this production that after a region server dies there are huge
> number of hfiles in that region for the region server running the version
> with HBASE-13082, In the doc it is given that it is expected to happen, but
> we found a one place where scanners are not being closed. If the scanners are
> not closed their references are not decremented and that is leading to the
> issue of huge number of store files not being finalized
> All I was able to find is in the selectScannersFrom, where we discard some of
> the scanners and we are not closing them. I am attaching a patch for that.
> Also to avoid these issues should the files that are done be logged and
> finalized (moved to archive) as a part of region close operation. This will
> solve any leaks that can happen and does not cause any dire consequences?
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