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From: Olesen, Mark (Mark.Olesen_at_[hidden])
Date: 2007-03-12 11:42:50


I'm testing openmpi 1.2rc1 with GridEngine 6.0u9 and ran into interesting
behaviour when using the qsub -notify option.
With -notify, USR1 and USR2 are sent X seconds before sending STOP and KILL
signals, respectively.

When the USR2 signal is sent to the process group with the mpirun process, I
receive an error message about not being able to start a daemon:

mpirun: Forwarding signal 12 to job[dealc12:18212] ERROR: A daemon on node
dealc12 failed to start as expected.
[dealc12:18212] ERROR: There may be more information available from
[dealc12:18212] ERROR: the 'qstat -t' command on the Grid Engine tasks.
[dealc12:18212] ERROR: If the problem persists, please restart the
[dealc12:18212] ERROR: Grid Engine PE job
[dealc12:18212] The daemon received a signal 12.
[dealc12:18212] ERROR: A daemon on node dealc20 failed to start as expected.
[dealc12:18212] ERROR: There may be more information available from
[dealc12:18212] ERROR: the 'qstat -t' command on the Grid Engine tasks.
[dealc12:18212] ERROR: If the problem persists, please restart the
[dealc12:18212] ERROR: Grid Engine PE job
[dealc12:18212] The daemon received a signal 12.

The job eventually stops, but the mpirun process itself continues to live
(just the ppid changes).

According to orte(1)/Signal Propagation, USR1 and USR2 should be propagated
to all processes in the job (which seems to be happening), but why is a
daemon start being attempted and the mpirun not being stopped?

/mark

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