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Crontab do not run on PM hours

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Operating Systems HP-UX Crontab do not run on PM hours
# 29  
Old 04-16-2012
Quote:
c queue max run limit
The following are the alphabet codes for the queue types:
Code:
a           For "at" jobs
b           For "batch" jobs
c           For "crontab" jobs

I think you need to add a c queue line in the queuedefs file, not change the a queue line. Be careful because the default is already 100 concurrent jobs. That is a lot of concurrent jobs so we do wonder what is happening in the other crontabs ?
# 30  
Old 04-16-2012
you could be right, because, the problem went away for a while only. Is back, I am having issues
Code:
tail /var/adm/cron/log
! c queue max run limit reached Mon Apr 16 13:51:00 SAST 2012
! rescheduling a cron job Mon Apr 16 13:51:00 SAST 2012
! c queue max run limit reached Mon Apr 16 13:51:00 SAST 2012
! rescheduling a cron job Mon Apr 16 13:51:00 SAST 2012
! c queue max run limit reached Mon Apr 16 13:51:01 SAST 2012
! rescheduling a cron job Mon Apr 16 13:51:01 SAST 2012
! c queue max run limit reached Mon Apr 16 13:51:01 SAST 2012
! rescheduling a cron job Mon Apr 16 13:51:01 SAST 2012
! c queue max run limit reached Mon Apr 16 13:51:01 SAST 2012
! rescheduling a cron job Mon Apr 16 13:51:01 SAST 2012

and cronjobs entries are not being runned
# 31  
Old 04-16-2012
The letter c at the start of the error message shows you that it is the c (crontab) queue.
(I had one yesterday for the a queue after a script containing at jobs went wrong).

I repeat that over 100 concurrent crontab jobs is worrying. Perhaps one of your other crontab files is faulty?
# 32  
Old 04-16-2012
or may be is the fact that I do not have an entry for
Code:
c

in the
Code:
more /var/adm/cron/queuedefs

Code:
mceldev[513]/tmp/fr #more /var/adm/cron/queuedefs
a.30j1n
b.2j2n90w
mceldev[514]/tmp/fr #

So shall I insert a c entry on the queuedefs file?

FR
# 33  
Old 04-16-2012
Check what's being ran inside those 100 concurrent jobs.

Are you really running 100 jobs concurrent jobs ?
Are they finishing properly ?

If all above is correct then increase concurrent jobs limit, unless you want the same to happen with 200 (or any) limit in future time Smilie

It's likely that some of that jobs are not exiting or hanging, occupying the one of the cron job slots forever ( until cron or machine is restarted/rebooted )
These 2 Users Gave Thanks to Peasant For This Post:
jim mcnamara methyl
# 34  
Old 04-16-2012
Peasant makes a vary good point.
My approach would be to look at every process in memory and account for each process, looking for processes which should not be there at that time of day. Particularly if there are lots of the same process which came from a crontab line which are still there long after they should have finished.
Code:
ps -ef | sort +8 | pg

The classic problem is where cron jobs connect to a remote database but never disconnect.
This User Gave Thanks to methyl For This Post:
jim mcnamara
# 35  
Old 04-17-2012
Crontab do not run on PM hours
I am not having 100 crontab entries. there are 17 entries, 10 for root and 7 for a user.

What is intriguing is after I changed the line a.10j1n to a.30j1n, the entries in the cron, runned, BUT I beleive by changing "a" should not make a difference, only if I changed the line "c" for crontab, it should do something, but on my queuedefs file there is not a "c" line.

Code:
#ps -ef | sort +8 | pg
     UID   PID  PPID  C    STIME TTY       TIME COMMAND
    root 18662  3370  0 07:54:56 ?         0:00 <defunct>
    root 18671 18666  0 07:55:37 pts/3     0:00 -sh
    root 18687 18671  0 07:55:40 pts/3     0:00 pg
    root 27814     1  0 14:21:46 ?         0:00 /usr/sbin/cron
  ora10g 18665     1  0 07:55:25 ?         0:00 ora_q000_bscsprod
  ora10g 18669     1  0 07:55:31 ?         0:00 ora_q001_bscsprod
  report 27726 19770  0 14:18:48 pts/1     0:00 -su
  ora10g 10002     1  0 23:34:31 ?         0:00 oraclebscsprod (LOCAL=NO)
  ora10g 10004     1  0 23:34:31 ?         0:00 oraclebscsprod (LOCAL=NO)
  ora10g 10006     1  0 23:34:31 ?         0:00 oraclebscsprod (LOCAL=NO)
  ora10g 10008     1  0 23:34:31 ?         0:00 oraclebscsprod (LOCAL=NO)
  ora10g 10010     1  0 23:34:31 ?         0:00 oraclebscsprod (LOCAL=NO)
  ora10g 10012     1  0 23:34:31 ?         0:00 oraclebscsprod (LOCAL=NO)
  ora10g 10014     1  0 23:34:31 ?         0:00 oraclebscsprod (LOCAL=NO)
  ora10g 10016     1  0 23:34:31 ?         0:00 oraclebscsprod (LOCAL=NO)
  ora10g 10018     1  0 23:34:31 ?         0:00 oraclebscsprod (LOCAL=NO)
  ora10g 18646     1  0 07:52:22 ?         0:00 oraclebscsprod (LOCAL=NO)
  ora10g 18648     1  0 07:52:22 ?         0:00 oraclebscsprod (LOCAL=NO)
    root 18686 18671  0 07:55:40 pts/3     0:00 sort +8
    root 20895     1  0 09:10:00 ?         0:00 sh -c /usr/sbin/ping 192.168.0.85 | while read pong; do echo "$(date): $pong"; done > /tmp/fr/ping_date.txt
    root 22193     1  0 10:00:00 ?         0:00 sh -c /usr/sbin/ping 192.168.0.85 | while read pong; do echo "$(date): $pong"; done > /tmp/fr/ping_date.txt
    root 22290     1  0 10:01:00 ?         0:00 sh -c /usr/sbin/ping 192.168.0.85 | while read pong; do echo "$(date): $pong"; done > /tmp/fr/ping_date.txt
    root 22303     1  0 10:02:00 ?         0:00 sh -c /usr/sbin/ping 192.168.0.85 | while read pong; do echo "$(date): $pong"; done > /tmp/fr/ping_date.txt
    root 22320     1  0 10:03:00 ?         0:00 sh -c /usr/sbin/ping 192.168.0.85 | while read pong; do echo "$(date): $pong"; done > /tmp/fr/ping_date.txt
    root 22350     1  0 10:04:00 ?         0:00 sh -c /usr/sbin/ping 192.168.0.85 | while read pong; do echo "$(date): $pong"; done > /tmp/fr/ping_date.txt
    root 22406     1  0 10:05:00 ?         0:00 sh -c /usr/sbin/ping 192.168.0.85 | while read pong; do echo "$(date): $pong"; done > /tmp/fr/ping_date.txt
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