Steve,
What version of Hadoop are you running?
For starters, I'd check glados6.systemsbiology.net's TT logs around
{11/10/26}-{15:40-42} for any Jetty related errors or others.
On Sat, Oct 29, 2011 at 11:11 PM, Steve Lewis <[email protected]> wrote:
> I have been getting error in my output saying error reading task
> outputhttp - I read that this may be a logging issue but
>
> do not know how or where to look for problems - when I go to the task
> tracker and click on the attempy is says ChildError
>
> and when I click on the output of the task it says not available. We
> have had issues with log directories being full but i need to know
>
> 1) Do I look on the jobtracker (singleton) or on each node - if on
> each node where and how do I fix the issue -
>
> Sometimes restarting the cluster helps but I wand a mush better
> understanding of what is going on
>
> 11/10/26 15:42:30 WARN mapred.JobClient: Error reading task outputhttp://
> glados6.systemsbiology.net:50060/tasklog?plaintext=true&taskid=attempt_201110261134_0009_m_000001_2&filter=stdout
> 11/10/26 15:42:30 WARN mapred.JobClient: Error reading task outputhttp://
> glados6.systemsbiology.net:50060/tasklog?plaintext=true&taskid=attempt_201110261134_0009_m_000001_2&filter=stderr
> 11/10/26 15:42:36 INFO mapred.JobClient: Task Id :
> attempt_201110261134_0009_r_000080_2, Status : FAILED
> java.lang.Throwable: Child Error
>
> java.lang.Throwable: Child Error
> at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:471)
> Caused by: java.io.IOException: Task process exit with nonzero status of 255.
> at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:458)
>
> Failed to retrieve stdout log for task: attempt_201110271342_0044_r_000000_0
>
> --
> Steven M. Lewis PhD
> 4221 105th Ave NE
> Kirkland, WA 98033
> 206-384-1340 (cell)
> Skype lordjoe_com
>
--
Harsh J
