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Subject: Re: [OMPI users] Occasional mpirun hang on completion
From: Barry Rountree (rountree_at_[hidden])
Date: 2008-01-13 10:17:06


On Sun, Jan 13, 2008 at 09:54:47AM -0500, Barry Rountree wrote:
> Hello,
>
> The following command
>
> mpirun -np 2 -hostfile ~/hostfile uptime
>
> will occasionally hang after completing. The expected output appears on
> the screen, but mpirun needs a SIGKILL to return to the console.
>
> This has been verified with OpenMPI v1.2.4 compiled with both icc 9.1
> 20061101 (aka 9.1.045) and gcc 4.1.0 20060304 (aka Red Hat 4.1.0-3). I
> have also tried earlier versions of OpenMPI and found the same bug
> (1.1.2 and 1.2.2).
>
> Using -verbose didn't provide any additional output. I'm happy to help
> tracking down whatever is causing this.

A couple more data points:

mpirun -np 4 -hostfile ~/hostfile --no-daemonize uptime

hung twice over 100 runs. Without the --no-daemonize, the command hung
16 times over 100 runs. (This is using the version compiled with icc.)

Barry

>
> Many thanks,
>
> Barry Rountree
> Ph.D. Candidate, Computer Science
> University of Georgia
>
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