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From "Mck SembWever (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-63) TaskTracker falls into an infinite loop.
Date Wed, 29 Dec 2010 00:43:45 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-63?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12975691#action_12975691
] 

Mck SembWever commented on MAPREDUCE-63:
----------------------------------------

Seems similar to HADOOP-3362
I solved it (or something looking similar to me) by opening port 50060 in the firewall between
nodes.

> TaskTracker falls into an infinite loop.
> ----------------------------------------
>
>                 Key: MAPREDUCE-63
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-63
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Konstantin Shvachko
>            Assignee: Arun C Murthy
>         Attachments: DataNode1.log, DataNode2.log, hadoop-1374-yunhong.tar.gz, JobTracker.log,
NameNode.log, TaskTracker1.log, TaskTracker2.log, TestDFSIO.log
>
>
> All maps had been completed successfully. I had only one reduce task during which
> TaskTracker infinitely outputs:
> 07/05/15 19:35:41 INFO mapred.TaskTracker: task_0001_r_000000_0 0.16666667% reduce >
copy (4 of 8 at 0.00 MB/s) > 
> 07/05/15 19:35:42 INFO mapred.TaskTracker: task_0001_r_000000_0 0.16666667% reduce >
copy (4 of 8 at 0.00 MB/s) > 
> 07/05/15 19:35:43 INFO mapred.TaskTracker: task_0001_r_000000_0 0.16666667% reduce >
copy (4 of 8 at 0.00 MB/s) > 
> 07/05/15 19:35:44 INFO mapred.TaskTracker: task_0001_r_000000_0 0.16666667% reduce >
copy (4 of 8 at 0.00 MB/s) > 
> 07/05/15 19:35:45 INFO mapred.TaskTracker: task_0001_r_000000_0 0.16666667% reduce >
copy (4 of 8 at 0.00 MB/s) > 
> JobTracker does not log anything about task task_0001_r_000000_0 except for
> 07/05/15 19:49:01 INFO mapred.JobTracker: Adding task 'task_0001_r_000000_0' to tip tip_0001_r_000000,
for tracker 'tracker_my-host.com:50050'

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