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MapReduce, mail # user - Re: Mapreduce jobtracker recover property


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Re: Mapreduce jobtracker recover property
Viswanathan J 2013-09-24, 05:29
Hi Shahab,

Thanks for the detailed response.

So the new property will have the default value as true in the package?

Thanks,
Viswa.J
On Sep 24, 2013 8:33 AM, "Shahab Yunus" <[EMAIL PROTECTED]> wrote:

> *mapred.jobtracker.restart.recover *is the old API, while the other one is
> for new. It is used to specify whether the job should try to resume at
> recovering time and when restarting. If you don't want to use it then the
> default value of false is used (specified in the already packaged/bundled
> config file in the distribution jars.)
>
>
> https://www.inkling.com/read/hadoop-definitive-guide-tom-white-3rd/chapter-5/running-on-a-cluster
>
> Regards,
> Shahab
>
>
> On Mon, Sep 23, 2013 at 10:31 PM, Viswanathan J <
> [EMAIL PROTECTED]> wrote:
>
>> Hi,
>>
>> I'm using the version Hadoop 1.2.1 in production hdfs, i can see the the
>> following properties with the value in jobtracker  job.xml,
>>
>> *mapreduce.job.restart.recover - true*
>> *mapred.jobtracker.restart.recover - false**
>> *
>>
>> What is the difference and which property will taken by the jobtracker?
>> Do we need really need these properties?
>>
>> Also I didn't set the value to those properties in any of the
>> configurations(eg., mapred-site.xml).
>>
>> Please help on this.
>>
>> --
>> Regards,
>> Viswa.J
>>
>
>