I was about to ask a similar question; we have the same sort of setup -
high, medium and low priority queues - and run into the same problem.
Doesn't happen all the time, but occasionally a job will simply still
sit there suspended although it should've gotten an SIGCONT.
Tina
On 01/03/14 12:23, Reuti wrote:
Hi,
Am 28.02.2014 um 00:28 schrieb Andrew Joplin:
New member here with a couple questions - they're unrelated, so I'll make
separate posts.
First off, we're runnig grid engine version OGS/GE 2011.11. I recently
finished setting up a hierarchy of three queues - high, medium, and low
priority. Medium is subordinate to high, and low to medium. The queues span
multiple hosts, but are all configured identically except for the subordination
(and a complex that I use to specify which queue to get into).
For the most part, this works great - I can submit a large number of long jobs to the low priority queue, and
they get suspended whenever someone else uses the medium priority queue. But the first problem I'm running
into is that occasionally, the suspended jobs don't seem to be restarted. According to qstat, they have been
(status "r"), but when I check the corresponding process on the execute host, I see a process
status "T", as if the SIGCONT signal was never sent. I can manually send a SIGCONT to the job, and
it finishes processing, but otherwise it does nothing until I notice it (usually next day). Other times a
job will show a status "r" in qstat, but I can't even find the process on the host it's supposed to
be on.
Has anyone seen this behavior before? I've tried recreating the problem, but I can't
seem to reliably reproduce it. It seems to just happen "sometimes" when one of
my long jobs gets suspended.
What can be done investigate it: setting a custom "resume_method" in the queue
definition and record whether the it was called or not (therein the SIGCONT needs to be
send to the complete process group:
kill -CONT -- $1
and parameter $1 is $job_pid from the pseudo variables for these interfaces.
-- Reuti
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