[StarCluster] workers go idle until a new worker is added ... solved

[Mike Cariaso]

solved.


adding '-b yes' does fix the problem. I was being misled by previous jobs that were still in queue.


Michael Cariaso
<mailto:michael.cariaso at keygene.com>
Bioinformatician<http://www.keygene.com>
________________________________
From: starcluster-bounces at mit.edu <starcluster-bounces at mit.edu> on behalf of Mike Cariaso <mike.cariaso at keygene.com>
Sent: Tuesday, August 23, 2016 2:14 AM
To: starcluster at mit.edu
Subject: Re: [StarCluster] workers go idle until a new worker is added ... ?


since 'qstat -j 2' shows me


...

error reason    8:          08/22/2016 15:31:35 [1000:44925]: unable to find job file "/opt/sge6/default/spool/exec_spool_local/mynew1-node001/job_scripts/2"
error reason    9:          08/22/2016 15:31:35 [1000:44926]: unable to find job file "/opt/sge6/default/spool/exec_spool_local/mynew1-node001/job_scripts/2"




this sounds a *lot* like the race condition described at


https://confluence.si.edu/display/HPC/Job+Arrays#JobArrays-ParallelJobArrays


and


http://users.gridengine.sunsource.narkive.com/66KtbRva/sporadic-errors-in-array-tasks-with-a-pe


but adding '-b yes' doesn't seem to fix the problem. (there were no

embedded SGE options in my scriptfile)


Has anyone else encountered this? Found a work around?



also fwiw:


less /opt/sge6/default/spool/exec_spool_local/mynew1-node001/messages


08/22/2016 15:31:36|  main|mynew1-node001|E|shepherd of job 2.8 exited with exit status = 11
08/22/2016 15:31:36|  main|mynew1-node001|C|exec of mailer "/bin/mail" failed: "No such file or directory"
08/22/2016 15:31:36|  main|mynew1-node001|E|shepherd of job 2.9 exited with exit status = 11





Michael Cariaso
<mailto:michael.cariaso at keygene.com>
Bioinformatician<http://www.keygene.com>
________________________________
From: starcluster-bounces at mit.edu <starcluster-bounces at mit.edu> on behalf of Mike Cariaso <mike.cariaso at keygene.com>
Sent: Tuesday, August 23, 2016 12:13 AM
To: starcluster at mit.edu
Subject: [StarCluster] workers go idle until a new worker is added ... ?


using the latest version from

https://github.com/datacratic<https://github.com/datacratic/StarCluster/blob/vanilla_improvements/starcluster/plugins/sge.py>


I start a master node, and zero workers, and put an array job into the queue. I then then gradually add workers nodes. A new worker accepts as many tasks as the slots allow, but  after they complete it never picks up additional work. When I add a new worker machine, it accepts some tasks  and runs them successfully, but never goes back for more. Usually during this time one of the idle previous machines will also pickup some more tasks, but once those are finished it again sits waiting.


qstat -j 1.19 shows me 'unable to find job file "/opt/sge6/default/spool/exec_spool_local/mynew1-node002/job_scripts/1"'


and it's true that no file is there. When I add a new machine, the job appears, suggesting this isn't a file permission issue.


some nodes remain out of action.

starcluster addnode -x -a nodename clustername

doesn't seem to help.



Michael Cariaso
<mailto:michael.cariaso at keygene.com>
Bioinformatician<http://www.keygene.com>
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