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semaphore files created but jobs would not start

 
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semaphore files created but jobs would not start
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owensjim



Joined: 08 Aug 2011
Posts: 49

Post semaphore files created but jobs would not start Reply with quote
Jobs would not start that should have been triggered by creation of a semaphore file.

jobscheduler stopped processing semaphore triggered jobs. No processing error, no indication of any troubles.

Job scheduler continued to process jobs but none of the triggered jobs would start. We had no processing errors during that time.

I had systems check the jscheduler server for any issues. We restarted job scheduler and the semaphore triggered started processing.
Tue Mar 05, 2013 6:26 pm View user's profile Send private message
SysOp
Site Admin


Joined: 26 Nov 2006
Posts: 6642

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I have heard about this issue before. It could happen if the system runs out of file handles and scheduler is simply unable to check for semaphore files existence and to open new files. The root cause of that effect is not very clear and known to happen only on certain types of Linux systems. As a workaround I suggest scheduling a weekly scheduler service restart.
Tue Mar 05, 2013 10:57 pm View user's profile Send private message
owensjim



Joined: 08 Aug 2011
Posts: 49

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Unfortunately, I did not restart our other job scheduler environment.

Job Scheduler encountered an issue today where the "watch" for semaphore files quit working. Jobs that were not triggered by semeaphore files continued to process. Those jobs that should have started by creation of a semaphore file waited. Job scheduler was restarted and the jobs triggered by semaphore files started processing.

This is the first time that I have seen this type of problem in our Linux VM machines. I do know that some DNS changes were made on Saturday and I am working with systems to see what other changes were made.
Wed Mar 06, 2013 11:53 am View user's profile Send private message
SysOp
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