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Posted to common-user@hadoop.apache.org by Steve Lewis <lo...@gmail.com> on 2011/10/29 19:41:02 UTC
outputhttp error may be log issue but the cluster is pretty sick
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
Re: outputhttp error may be log issue but the cluster is pretty sick
Posted by Steve Lewis <lo...@gmail.com>.
Where do I find the TT logs
On Oct 29, 2011 1:06 PM, "Harsh J" <ha...@cloudera.com> wrote:
> 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 <lo...@gmail.com>
> 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
>
Re: outputhttp error may be log issue but the cluster is pretty sick
Posted by Harsh J <ha...@cloudera.com>.
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 <lo...@gmail.com> 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