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https://issues.apache.org/jira/browse/HDFS-5676?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13852314#comment-13852314
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Hudson commented on HDFS-5676:
------------------------------
SUCCESS: Integrated in Hadoop-trunk-Commit #4913 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/4913/])
HDFS-5676. fix inconsistent synchronization of CachingStrategy (cmccabe)
(cmccabe:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1552162)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSOutputStream.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/CachingStrategy.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestConnCache.java
> fix inconsistent synchronization of CachingStrategy
> ---------------------------------------------------
>
> Key: HDFS-5676
> URL: https://issues.apache.org/jira/browse/HDFS-5676
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs-client
> Affects Versions: 2.4.0
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Priority: Minor
> Fix For: 2.4.0
>
> Attachments: HDFS-5676.001.patch, HDFS-5676.003.patch
>
>
> Currently, the synchronization for {{CachingStrategy}} is a little
> inconsistent. DFSOutputStream#setDropBehind modifies the strategy object,
> but there's nothing protecting that object against concurrent use in
> {{createBlockOutputStream}}. Similarly, {{DFSInputStream#setDropBehind}} is
> synchronized, but not all the uses of {{cachingStrategy}} are.
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