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https://issues.apache.org/jira/browse/HADOOP-10095?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13822445#comment-13822445
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Hudson commented on HADOOP-10095:
---------------------------------
SUCCESS: Integrated in Hadoop-Hdfs-trunk #1582 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk/1582/])
HADOOP-10095. In CodecPool, synchronize pool and codecList separately in order
to reduce lock contention. Contributed by Nicolas Liochon (szetszwo:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1541750)
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
*
/hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/CodecPool.java
> Performance improvement in CodecPool
> ------------------------------------
>
> Key: HADOOP-10095
> URL: https://issues.apache.org/jira/browse/HADOOP-10095
> Project: Hadoop Common
> Issue Type: Improvement
> Components: io
> Affects Versions: 3.0.0, 2.2.0
> Reporter: Nicolas Liochon
> Assignee: Nicolas Liochon
> Priority: Minor
> Fix For: 3.0.0, 2.2.1
>
> Attachments: 10095.v1.patch
>
>
> CodecPool shows up when profiling HBase with a mixed workload (it says we
> spend 1% of the time there).
> It could be a profiler side effect, but on the other hand we can save some
> 'Map#contains'.
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