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https://issues.apache.org/jira/browse/HDFS-4911?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13894522#comment-13894522
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Hudson commented on HDFS-4911:
------------------------------
SUCCESS: Integrated in Hadoop-Hdfs-trunk #1666 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk/1666/])
HDFS-4911. Reduce PeerCache timeout to be commensurate with
dfs.datanode.socket.reuse.keepalive (cmccabe) (cmccabe:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1565435)
* /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/DFSConfigKeys.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/PeerCache.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDataTransferKeepalive.java
> Reduce PeerCache timeout to be commensurate with
> dfs.datanode.socket.reuse.keepalive
> ------------------------------------------------------------------------------------
>
> Key: HDFS-4911
> URL: https://issues.apache.org/jira/browse/HDFS-4911
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Priority: Minor
> Fix For: 2.4.0
>
> Attachments: HDFS-4911.001.patch
>
>
> The default timeout for the client's PeerCache is much longer than the
> DataNode would possibly keep the socket open. Specifically,
> {{dfs.client.socketcache.expiryMsec}} defaults to 2 *
> 60 * 1000 (2 minutes), whereas {{dfs.datanode.socket.reuse.keepalive}}
> defaults to 1000 (1 second). We should make these more similar to minimize
> situations where the client tries to use sockets which have gone stale.
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