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From yaotian <yaot...@gmail.com>
Subject Re: I am running MapReduce on a 30G data on 1master/2 slave, but failed.
Date Fri, 11 Jan 2013 05:28:55 GMT
Yes, you are right. The data is GPS trace related to corresponding uid. The
reduce is doing this: Sort user to get this kind of result: uid, gps1,
gps2, gps3........
Yes, the gps data is big because this is 30G data.

How to solve this?



2013/1/11 Mahesh Balija <balijamahesh.mca@gmail.com>

> Hi,
>
>           2 reducers are successfully completed and 1498 have been killed.
> I assume that you have the data issues. (Either the data is huge or some
> issues with the data you are trying to process)
>           One possibility could be you have many values associated to a
> single key, which can cause these kind of issues based on the operation you
> do in your reducer.
>           Can you put some logs in your reducer and try to trace out what
> is happening.
>
> Best,
> Mahesh Balija,
> Calsoft Labs.
>
>
> On Fri, Jan 11, 2013 at 8:53 AM, yaotian <yaotian@gmail.com> wrote:
>
>> I have 1 hadoop master which name node locates and 2 slave which datanode
>> locate.
>>
>> If i choose a small data like 200M, it can be done.
>>
>> But if i run 30G data, Map is done. But the reduce report error. Any
>> sugggestion?
>>
>>
>> This is the information.
>>
>> *Black-listed TaskTrackers:* 1<http://23.20.27.135:9003/jobblacklistedtrackers.jsp?jobid=job_201301090834_0041>
>> ------------------------------
>> Kind % CompleteNum Tasks PendingRunningComplete KilledFailed/Killed
>> Task Attempts<http://23.20.27.135:9003/jobfailures.jsp?jobid=job_201301090834_0041>
>> map<http://23.20.27.135:9003/jobtasks.jsp?jobid=job_201301090834_0041&type=map&pagenum=1>
>> 100.00%4500 0450<http://23.20.27.135:9003/jobtasks.jsp?jobid=job_201301090834_0041&type=map&pagenum=1&state=completed>
>> 00 / 1<http://23.20.27.135:9003/jobfailures.jsp?jobid=job_201301090834_0041&kind=map&cause=killed>
>> reduce<http://23.20.27.135:9003/jobtasks.jsp?jobid=job_201301090834_0041&type=reduce&pagenum=1>
>> 100.00%1500 0 02<http://23.20.27.135:9003/jobtasks.jsp?jobid=job_201301090834_0041&type=reduce&pagenum=1&state=completed>
>> 1498<http://23.20.27.135:9003/jobtasks.jsp?jobid=job_201301090834_0041&type=reduce&pagenum=1&state=killed>
>> 12<http://23.20.27.135:9003/jobfailures.jsp?jobid=job_201301090834_0041&kind=reduce&cause=failed>
>>  / 3<http://23.20.27.135:9003/jobfailures.jsp?jobid=job_201301090834_0041&kind=reduce&cause=killed>
>>
>>
>> TaskCompleteStatusStart TimeFinish TimeErrorsCounters
>> task_201301090834_0041_r_000001<http://23.20.27.135:9003/taskdetails.jsp?tipid=task_201301090834_0041_r_000001>
>> 0.00%
>> 10-Jan-2013 04:18:54
>> 10-Jan-2013 06:46:38 (2hrs, 27mins, 44sec)
>>
>> Task attempt_201301090834_0041_r_000001_0 failed to report status for 600 seconds.
Killing!
>> Task attempt_201301090834_0041_r_000001_1 failed to report status for 602 seconds.
Killing!
>> Task attempt_201301090834_0041_r_000001_2 failed to report status for 602 seconds.
Killing!
>> Task attempt_201301090834_0041_r_000001_3 failed to report status for 602 seconds.
Killing!
>>
>>
>> 0<http://23.20.27.135:9003/taskstats.jsp?tipid=task_201301090834_0041_r_000001>
>> task_201301090834_0041_r_000002<http://23.20.27.135:9003/taskdetails.jsp?tipid=task_201301090834_0041_r_000002>
>> 0.00%
>> 10-Jan-2013 04:18:54
>> 10-Jan-2013 06:46:38 (2hrs, 27mins, 43sec)
>>
>> Task attempt_201301090834_0041_r_000002_0 failed to report status for 601 seconds.
Killing!
>> Task attempt_201301090834_0041_r_000002_1 failed to report status for 600 seconds.
Killing!
>>
>>
>> 0<http://23.20.27.135:9003/taskstats.jsp?tipid=task_201301090834_0041_r_000002>
>> task_201301090834_0041_r_000003<http://23.20.27.135:9003/taskdetails.jsp?tipid=task_201301090834_0041_r_000003>
>> 0.00%
>> 10-Jan-2013 04:18:57
>> 10-Jan-2013 06:46:38 (2hrs, 27mins, 41sec)
>>
>> Task attempt_201301090834_0041_r_000003_0 failed to report status for 602 seconds.
Killing!
>> Task attempt_201301090834_0041_r_000003_1 failed to report status for 602 seconds.
Killing!
>> Task attempt_201301090834_0041_r_000003_2 failed to report status for 602 seconds.
Killing!
>>
>>
>> 0<http://23.20.27.135:9003/taskstats.jsp?tipid=task_201301090834_0041_r_000003>
>> task_201301090834_0041_r_000005<http://23.20.27.135:9003/taskdetails.jsp?tipid=task_201301090834_0041_r_000005>
>> 0.00%
>> 10-Jan-2013 06:11:07
>> 10-Jan-2013 06:46:38 (35mins, 31sec)
>>
>> Task attempt_201301090834_0041_r_000005_0 failed to report status for 600 seconds.
Killing!
>>
>>
>> 0<http://23.20.27.135:9003/taskstats.jsp?tipid=task_201301090834_0041_r_000005>
>>
>
>

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