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From Nitin Pawar <nitinpawar...@gmail.com>
Subject Re: Task or job tracker seems not working?
Date Thu, 17 Apr 2014 11:18:05 GMT
you need to allocate sufficient memory to datanodes as well.
Also make sure that none of the network cards on your datanodes have turned
bad.

Most of the time the error you saw comes when there is heavy utilization of
cluser or it is undergoing some kind of network issue.


On Thu, Apr 17, 2014 at 4:37 PM, Karim Awara <karim.awara@kaust.edu.sa>wrote:

>
> im setting  mapred.child.java.opts to Xmx8G.    my dataset im using for
> the mapreduce job is quite small (few hundred megabytes) as well.
>
> --
> Best Regards,
> Karim Ahmed Awara
>
>
> On Thu, Apr 17, 2014 at 2:01 PM, Nitin Pawar <nitinpawar432@gmail.com>wrote:
>
>> Can you tell us JVM memory allocated to all data nodes?
>>
>>
>> On Thu, Apr 17, 2014 at 4:28 PM, Karim Awara <karim.awara@kaust.edu.sa>wrote:
>>
>>> Hi,
>>>
>>> I am running a mpreduce job on a cluster of 16 machines.  The HDFS is
>>> working normally however, when I ran a mapreduce job, it gives an error:
>>>
>>> Java.io.IOException: Bad connect act with firstBadLink
>>>
>>> although I have all the processes up..
>>>
>>>
>>>
>>>
>>> --
>>> Best Regards,
>>> Karim Ahmed Awara
>>>
>>> ------------------------------
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>>
>>
>>
>>
>> --
>> Nitin Pawar
>>
>
>
> ------------------------------
> This message and its contents, including attachments are intended solely
> for the original recipient. If you are not the intended recipient or have
> received this message in error, please notify me immediately and delete
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>



-- 
Nitin Pawar

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