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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6057) DomainSocketWatcher.watcherThread should be marked as daemon thread
Date Thu, 06 Mar 2014 11:33:16 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6057?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13922350#comment-13922350
] 

Hudson commented on HDFS-6057:
------------------------------

FAILURE: Integrated in Hadoop-Hdfs-trunk #1693 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/1693/])
HDFS-6057. DomainSocketWatcher.watcherThread should be marked as a daemon thread (cmccabe)
(cmccabe: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1574787)
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/net/unix/DomainSocketWatcher.java
* /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/client/DfsClientShmManager.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/client/ShortCircuitCache.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestBlockReaderFactory.java


> DomainSocketWatcher.watcherThread should be marked as daemon thread
> -------------------------------------------------------------------
>
>                 Key: HDFS-6057
>                 URL: https://issues.apache.org/jira/browse/HDFS-6057
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs-client
>    Affects Versions: 2.4.0
>            Reporter: Eric Sirianni
>            Assignee: Colin Patrick McCabe
>            Priority: Blocker
>             Fix For: 2.4.0
>
>         Attachments: HDFS-6057.002.patch, HDFS-6057.003.patch, hdfs-6057-v1.txt
>
>
> Running the tip of {{branch-2.4}}, I'm observing some zombie processes in my environment.
 jstack shows the following thread preventing the JVM from shutting down:
> {noformat}
> "Thread-3" prio=10 tid=0x00007f0a908a5800 nid=0x3ee9 runnable [0x00007f0a89471000]
>    java.lang.Thread.State: RUNNABLE
> 	at org.apache.hadoop.net.unix.DomainSocketWatcher.doPoll0(Native Method)
> 	at org.apache.hadoop.net.unix.DomainSocketWatcher.access$800(DomainSocketWatcher.java:52)
> 	at org.apache.hadoop.net.unix.DomainSocketWatcher$1.run(DomainSocketWatcher.java:455)
> 	at java.lang.Thread.run(Thread.java:679)
> {noformat}
> Marking the {{DomainSocketWatcher.watcherThread}} as a daemon thread would prevent this
situation.  Is there any reason it isn't classified as such?
> Also, tracing through the code, I don't see any code path where {{DomainSocketWatcher.close()}}
is invoked (though this would seem to be a larger issue -- maybe I'm missing something...).



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