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https://issues.apache.org/jira/browse/HADOOP-911?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12511518
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Hadoop QA commented on HADOOP-911:
----------------------------------
+1
http://issues.apache.org/jira/secure/attachment/12361454/libhdfs.patch applied
and successfully tested against trunk revision r554811.
Test results:
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/389/testReport/
Console output:
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/389/console
> Multithreading issue with libhdfs library
> -----------------------------------------
>
> Key: HADOOP-911
> URL: https://issues.apache.org/jira/browse/HADOOP-911
> Project: Hadoop
> Issue Type: Bug
> Components: libhdfs
> Affects Versions: 0.9.2
> Reporter: Christian Kunz
> Priority: Blocker
> Fix For: 0.14.0
>
> Attachments: libhdfs.patch
>
>
> Multithreaded applications using libhdfs sometimes run into
> IllegalMonitorStateException or plainly lock up (strace shows a thread being
> in a loop of calling sched_yield). It probably has to do with the fact that
> libhdfs does not ensure proper allocation of hashtable entries that map a
> threadId to JNI interface pointer.
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