hadoop-mapreduce-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Harsh J <ha...@cloudera.com>
Subject Re: Jobs randomly not starting
Date Fri, 13 Jul 2012 06:04:00 GMT
Hey Robert,

Any chance you can pastebin the JT logs, grepped for the bad job ID,
and send the link across? They shouldn't hang the way you describe.

On Fri, Jul 13, 2012 at 9:33 AM, Robert Dyer <psybers@gmail.com> wrote:
> I'm using Hadoop 1.0.3 on a small cluster (1 namenode, 1 jobtracker, 2
> compute nodes).  My input size is a sequence file of around 280mb.
> Generally, my jobs run just fine and all finish in 2-5 minutes.  However,
> quite randomly the jobs refuse to run.  They submit and appear when running
> 'hadoop job -list' but don't appear on the jobtracker's webpage.  If I
> manually type in the job ID on the webpage I can see it is trying to run the
> setup task - the map tasks haven't even started.  I've left them to run and
> even after several minutes it is still in this state.
> When I spot this, I kill the job and resubmit it and generally it works.
> A couple of times I have seen similar problems with reduce tasks that get
> stuck while 'initializing'.
> Any ideas?

Harsh J

View raw message