gt;
530 E. Liberty St.
Ann Arbor, MI 48104
Direct: 734.922.7007
http://mybuys.com/ <http://mybuys.com/>
From: John Miller
Sent: Wednesday, December 28, 2011 2:09 PM
To: John Miller; mapreduce-user@hadoop.apache.org
Subject: RE: Tasktracker Task Attempts Stuck (mapreduce.task.ti
ect: 734.922.7007
http://mybuys.com/ <http://mybuys.com/>
From: Todd Lipcon [mailto:t...@cloudera.com]
Sent: Monday, December 19, 2011 11:09 PM
To: mapreduce-user@hadoop.apache.org
Subject: Re: Tasktracker Task Attempts Stuck (mapreduce.task.timeout not
working)
On Mon, Dec 19, 201
**
>>
>> [image: mybuys-ops-small] <http://mybuys.com/>**
>>
>> 530 E. Liberty St.
>>
>> Ann Arbor, MI 48104
>>
>> Direct: 734.922.7007
>>
>> *http://mybuys.com/*
>>
>> ** **
>>
>> *From:* Arun C M
E. Liberty St.
>
> Ann Arbor, MI 48104
>
> Direct: 734.922.7007
>
> *http://mybuys.com/*
>
> ** **
>
> *From:* Arun C Murthy [mailto:a...@hortonworks.com]
> *Sent:* Thursday, December 15, 2011 2:03 PM
> *To:* mapreduce-user@hadoop.apache.org
> *Subject:* Re: T
/mybuys.com/>
530 E. Liberty St.
Ann Arbor, MI 48104
Direct: 734.922.7007
http://mybuys.com/ <http://mybuys.com/>
From: Arun C Murthy [mailto:a...@hortonworks.com]
Sent: Thursday, December 15, 2011 2:03 PM
To: mapreduce-user@hadoop.apache.org
Subject: Re: Tasktracker Task Attempts
Hi John,
It's hard for folks on this list to diagnose CDH (you might have to ask their
lists). However, I haven't seen similar issues with hadoop-0.20.2xx in a while.
One thing to check would be to grab a stack trace (jstack) on the tasks to see
what they are upto. Next, try get a tcpdump to
I've recently come across some interesting things happening within a
50-node cluster regarding the tasktrackers and task attempts.
Essentially tasks are being created but they are sticking at 0.0% and it
seems the 'mapreduce.task.timeout' isn't taking effect and they just sit
there (for days if we
