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https://issues.apache.org/jira/browse/HBASE-5387?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13213409#comment-13213409
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Phabricator commented on HBASE-5387:
------------------------------------
Karthik has accepted the revision "[jira] [HBASE-5387] [89-fb] Reuse
compression streams in HFileBlock.Writer".
REVISION DETAIL
https://reviews.facebook.net/D1725
BRANCH
fix_gzip5
> Reuse compression streams in HFileBlock.Writer
> ----------------------------------------------
>
> Key: HBASE-5387
> URL: https://issues.apache.org/jira/browse/HBASE-5387
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.94.0
> Reporter: Mikhail Bautin
> Assignee: Mikhail Bautin
> Priority: Critical
> Fix For: 0.94.0
>
> Attachments: 5387.txt, D1719.1.patch, D1719.2.patch, D1719.3.patch,
> D1719.4.patch, D1719.5.patch, D1725.1.patch, D1725.2.patch,
> Fix-deflater-leak-2012-02-10_18_48_45.patch,
> Fix-deflater-leak-2012-02-11_17_13_10.patch,
> Fix-deflater-leak-2012-02-12_00_37_27.patch
>
>
> We need to to reuse compression streams in HFileBlock.Writer instead of
> allocating them every time. The motivation is that when using Java's built-in
> implementation of Gzip, we allocate a new GZIPOutputStream object and an
> associated native data structure every time we create a compression stream.
> The native data structure is only deallocated in the finalizer. This is one
> suspected cause of recent TestHFileBlock failures on Hadoop QA:
> https://builds.apache.org/job/HBase-TRUNK/2658/testReport/org.apache.hadoop.hbase.io.hfile/TestHFileBlock/testPreviousOffset_1_/.
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