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Date: Mon, 6 Feb 2012 22:28:59 +0000 (UTC)
From: "Robert Joseph Evans (Assigned) (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
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Subject: [jira] [Assigned] (MAPREDUCE-3802) If an MR AM dies twice  it looks
 like the process freezes
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     [ https://issues.apache.org/jira/browse/MAPREDUCE-3802?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Joseph Evans reassigned MAPREDUCE-3802:
----------------------------------------------

    Assignee: Robert Joseph Evans
    
> If an MR AM dies twice  it looks like the process freezes
> ---------------------------------------------------------
>
>                 Key: MAPREDUCE-3802
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3802
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: applicationmaster, mrv2
>    Affects Versions: 0.23.1, 0.24.0
>            Reporter: Robert Joseph Evans
>            Assignee: Robert Joseph Evans
>            Priority: Critical
>         Attachments: syslog
>
>
> It looks like recovering from an RM AM dieing works very well on a single failure.  But if it fails multiple times we appear to get into a live lock situation.
> {noformat}
> yarn jar hadoop/share/hadoop/mapreduce/hadoop-mapreduce-examples-*-SNAPSHOT.jar wordcount -Dyarn.app.mapreduce.am.log.level=DEBUG -Dmapreduce.job.reduces=30 input output
> 12/02/03 21:06:57 WARN conf.Configuration: fs.default.name is deprecated. Instead, use fs.defaultFS
> 12/02/03 21:06:57 WARN conf.Configuration: mapred.used.genericoptionsparser is deprecated. Instead, use mapreduce.client.genericoptionsparser.used
> 12/02/03 21:06:57 INFO input.FileInputFormat: Total input paths to process : 17
> 12/02/03 21:06:57 INFO util.NativeCodeLoader: Loaded the native-hadoop library
> 12/02/03 21:06:57 WARN snappy.LoadSnappy: Snappy native library not loaded
> 12/02/03 21:06:57 INFO mapreduce.JobSubmitter: number of splits:17
> 12/02/03 21:06:57 INFO mapred.ResourceMgrDelegate: Submitted application application_1328302034486_0003 to ResourceManager at HOST/IP:8040
> 12/02/03 21:06:57 INFO mapreduce.Job: The url to track the job: http://HOST:8088/proxy/application_1328302034486_0003/
> 12/02/03 21:06:57 INFO mapreduce.Job: Running job: job_1328302034486_0003
> 12/02/03 21:07:03 INFO mapreduce.Job: Job job_1328302034486_0003 running in uber mode : false
> 12/02/03 21:07:03 INFO mapreduce.Job:  map 0% reduce 0%
> 12/02/03 21:07:09 INFO mapreduce.Job:  map 5% reduce 0%
> 12/02/03 21:07:10 INFO mapreduce.Job:  map 17% reduce 0%
> #KILLED AM with kill -9 here
> 12/02/03 21:07:16 INFO mapreduce.Job:  map 29% reduce 0%
> 12/02/03 21:07:17 INFO mapreduce.Job:  map 35% reduce 0%
> 12/02/03 21:07:30 INFO mapreduce.Job:  map 52% reduce 0%
> 12/02/03 21:07:35 INFO mapreduce.Job:  map 58% reduce 0%
> 12/02/03 21:07:37 INFO mapreduce.Job:  map 70% reduce 0%
> 12/02/03 21:07:41 INFO mapreduce.Job:  map 76% reduce 0%
> 12/02/03 21:07:43 INFO mapreduce.Job:  map 82% reduce 0%
> 12/02/03 21:07:44 INFO mapreduce.Job:  map 88% reduce 0%
> 12/02/03 21:07:47 INFO mapreduce.Job:  map 94% reduce 0%
> 12/02/03 21:07:49 INFO mapreduce.Job:  map 100% reduce 0%
> 12/02/03 21:07:53 INFO mapreduce.Job:  map 100% reduce 3%
> 12/02/03 21:08:00 INFO mapreduce.Job:  map 100% reduce 6%
> 12/02/03 21:08:06 INFO mapreduce.Job:  map 100% reduce 10%
> 12/02/03 21:08:12 INFO mapreduce.Job:  map 100% reduce 13%
> 12/02/03 21:08:18 INFO mapreduce.Job:  map 100% reduce 16%
> #killed AM with kill -9 here
> 12/02/03 21:08:20 INFO ipc.Client: Retrying connect to server: HOST/IP:44223. Already tried 0 time(s).
> 12/02/03 21:08:21 INFO ipc.Client: Retrying connect to server: HOST/IP:44223. Already tried 1 time(s).
> 12/02/03 21:08:22 INFO ipc.Client: Retrying connect to server: HOST/IP:44223. Already tried 2 time(s).
> 12/02/03 21:08:26 INFO mapreduce.Job:  map 64% reduce 16%
> #It never makes any more progress...
> {noformat}

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