hadoop-mapreduce-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAPREDUCE-1869) TaskTracker hangs due to fork() being MT-unsafe
Date Wed, 16 Jun 2010 00:42:25 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-1869?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Allen Wittenauer updated MAPREDUCE-1869:
----------------------------------------

    Summary: TaskTracker hangs due to fork() being MT-unsafe  (was: TaskTracker hung in org.apache.hadoop.fs.LocalDirAllocator)

After talking with various folks, the current thinking is that this is related to http://bugs.sun.com/view_bug.do?bug_id=5049299
and friends.  My stack trace matches other traces where fork() has blown up.

> TaskTracker hangs due to fork() being MT-unsafe
> -----------------------------------------------
>
>                 Key: MAPREDUCE-1869
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1869
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: tasktracker
>    Affects Versions: 0.20.2
>         Environment: Solaris 10 Update 7
> Java 1.6.0_14
>            Reporter: Allen Wittenauer
>            Priority: Critical
>         Attachments: jstack.txt, pstack.txt
>
>
> A TaskTracker process on our grid appears to be locked up and not sending heartbeats
to the namenode.  Attaching jstack and pstack output.  Even tho the hangs appear to be in
LocalDirAllocator, the local file system seems to be a-ok.  

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message