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From "firegun (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-5606) JobTracker blocked for DFSClient: Failed recovery attempt
Date Tue, 05 Nov 2013 02:48:17 GMT
firegun created MAPREDUCE-5606:
----------------------------------

             Summary: JobTracker blocked for DFSClient: Failed recovery attempt
                 Key: MAPREDUCE-5606
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5606
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: jobtracker
    Affects Versions: 1.0.3
         Environment: centos 5.8  jdk 1.7 
            Reporter: firegun
            Priority: Critical


when a  datanode was crash,the server can  ping ok,but can not  call rpc ,and also can not
ssh login. and then jobTracker may be request a block on this datanode.
it will happened ,the  JobTracker can not work,the webUI is also unwork,hadoop job -list also
unwork,the jobTracker logs no other info .

and then we need to restart the datanode.
then jobTraker can work too,but the taskTracker num come to zero,
we need run : hadoop mradmin -refreshNodes
then the JobTracker begin to add taskTraker ,but is very slowly.

this problem occur 5time  in 2weeks.




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