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MapReduce >> mail # user >> hadoop-1.0.0 and errors with log.index

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Re: hadoop-1.0.0 and errors with log.index
Actually, all that is telling you is that the task failed and the job-client couldn't display the logs.

Can you check the JT web-ui and see why the task failed ?

If you don't see anything there, you can try see the TaskTracker logs on the node on which the task ran.


On Jan 31, 2012, at 3:21 AM, Marcin Cylke wrote:

> Hi
> I've upgraded my hadoop cluster to version 1.0.0. The upgrade process
> went relatively smoothly but it rendered the cluster inoperable due to
> errors in jobtrackers operation:
> # in job output
> Error reading task
> outputhttp://hadoop4:50060/tasklog?plaintext=true&attemptid=attempt_201201311241_0003_m_000004_2&filter=stdout
> # in each of the jobtrackers' logs
> WARN org.apache.hadoop.mapred.TaskLog: Failed to retrieve stderr log for
> task: attempt_201201311241_0003_r_000000_1
> java.io.FileNotFoundException:
> /usr/lib/hadoop-1.0.0/libexec/../logs/userlogs/job_201201311241_0003/attempt_201201311241_0003_r_000000_1/log.index
> (No such file or directory)
>         at java.io.FileInputStream.open(Native Method)
> These errors seem related to this two problems:
> http://grokbase.com/t/hadoop.apache.org/mapreduce-user/2012/01/error-reading-task-output-and-log-filenotfoundexceptions/03mjwctewcnxlgp2jkcrhvsgep4e
> https://issues.apache.org/jira/browse/MAPREDUCE-2846
> But I've looked into the source code and the fix from MAPREDUCE-2846 is
> there. Perhaps there is some other reason?
> Regards
> Marcin

Arun C. Murthy
Hortonworks Inc.