topic Re: crontab entry do not run on PM hours in Operating System - HP-UX

crontab entry do not run on PM hours

NDO — Wed, 11 Apr 2012 14:49:39 GMT

Hi All

I have a problem, I wonder if you can help me sort it out:

I have the following entry in the cron:

00 1,13 * * * /xxx/yyy/zzzz.ksh > ttttt.log

But the entry only runs at 01:00Am. I have stopped the cron deamon, and started, but it still does not work.

Can you help figure it out what is wrong with it?

FR

Re: crontab entry do not run on PM hours

Patrick Wallek — Wed, 11 Apr 2012 15:55:03 GMT

The crontab entry looks fine. I don't see any obvious errors.

Is there any information in /var/adm/cron/log?

What about your ttttt.log file?

Re: crontab entry do not run on PM hours

NDO — Wed, 11 Apr 2012 17:23:04 GMT

There is no error entry in the /var/adm/cron/log file. But the entry runs only for the 01:00

Re: crontab entry do not run on PM hours

Patrick Wallek — Wed, 11 Apr 2012 18:33:01 GMT

Try setting up a separate line for the 1:00 PM execution:

00 1 * * * /xxx/yyy/zzzz.ksh > ttttt.log

00 13 * * * /xxx/yyy/zzzz.ksh > ttttt.log

Re: crontab entry do not run on PM hours

NDO — Thu, 12 Apr 2012 12:02:42 GMT

The only entry that run was the one of 01:00AM, but this one:

00 13 * * * /xxx/yyy/zzzz.ksh > ttttt.log

did not run.

If I do grep "report" /var/adm/cron/log I can see an entry for the one executed at 01:00AM.

Re: crontab entry do not run on PM hours

Patrick Wallek — Thu, 12 Apr 2012 13:54:52 GMT

Can you run something else at 1:00 PM and see if it works?

Try stopping and restarting cron.

# /sbin/init.d/cron stop

# /sbin/init.d/cron start

Re: crontab entry do not run on PM hours

NDO — Thu, 12 Apr 2012 14:04:02 GMT

I have done that many times it only work for the 01:00AM entry, but I will do it again just before 01:00PM which is in about 21 hours from now, where I am :)

Re: crontab entry do not run on PM hours

Dennis Handly — Thu, 12 Apr 2012 16:34:15 GMT

>I have done that many times it only work for the 01:00AM entry,

Are you using "crontab -e" or "crontab file" to edit your entries?

Re: crontab entry do not run on PM hours

NDO — Fri, 13 Apr 2012 12:05:09 GMT

After stopping/starting, which did not solve the problem, a schedulled reboot has solved the problem.

Many thanks to all that contributed.

Re: crontab entry do not run on PM hours

NDO — Fri, 13 Apr 2012 12:06:09 GMT

yes, I am using crontab -e <user>

Re: crontab entry do not run on PM hours

Ajin_1 — Fri, 13 Apr 2012 19:21:20 GMT

Hi
Check the ownership and permission of crontab ,This also may create problems. Check with working server.

Re: crontab entry do not run on PM hours

NDO — Mon, 16 Apr 2012 07:10:03 GMT

crontab again not working

If I run

grep "max run limit" /var/adm/cron/log | more

I got the following:

! c queue max run limit reached Fri Apr 13 14:50:00 SAST 2012
! c queue max run limit reached Fri Apr 13 14:50:00 SAST 2012
! c queue max run limit reached Fri Apr 13 14:50:00 SAST 2012
! c queue max run limit reached Fri Apr 13 14:51:00 SAST 2012
! c queue max run limit reached Fri Apr 13 14:51:00 SAST 2012

But If I run:

more /var/adm/cron/queuedefs

I have the following:

a.4j1n
b.2j2n90w

only, so no c is present.

Do I have to change some setting?

Re: crontab entry do not run on PM hours

Dennis Handly — Mon, 16 Apr 2012 08:07:33 GMT

>! c queue max run limit reached Fri Apr 13 14:50:00 SAST 2012

Are you trying to run too many jobs at the same time?

>so no c is present. Do I have to change some setting?

That's what mine looks like, it's fine.

queuedefs(4) has "a" for at(1) and "b" for batch(1). And "c" is for crontab.

The default limit is 100, unless you set the variable DISABLE_MAXJOB_LIMIT to 1 in the /etc/default/cron file.

Re: crontab entry do not run on PM hours

NDO — Mon, 16 Apr 2012 09:28:18 GMT

I think now the problem is solved, what I did was to change the text "a.4j1n" to "a.10j1n" in file "/var/adm/cron/queuedefs", them stopt/start cron deamon. So

nothing appears now, when I run "grep "max run limit" /var/adm/cron/log | more" and entries in the crontab are being executed.

But now I would like to know what would mean if I set the variable DISABLE_MAXJOB_LIMIT to 1 in the /etc/default/cron file?

Re: crontab entry do not run on PM hours

NDO — Mon, 16 Apr 2012 12:25:41 GMT

@Dennins:

on my system running 11.23 in the /etc/default/cron the entry "DISABLE_MAXJOB_LIMIT " is not there:

#more /etc/default/cron
##
# This is a configuration file used for setting the
# value for BATCH_MAXTRYS. BATCH_MAXTRYS determines the number
# of attempts batch(1) command should make for getting a uniqe job-id.
#
# Entry should be in the following format :
# BATCH_MAXTRYS=<value>
#    <value> can be any number greater than 0.
# or
# BATCH_MAXTRYS=INFINITE
#    If set to "INFINITE" batch(1) will try to get a uniqe job-id untill
#    successful.
BATCH_MAXTRYS=INFINITE
mceldev[495]/tmp/fr #

And now the system is rescheduling entries :

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

I really dont know what else to do...

Re: crontab entry do not run on PM hours

Dennis Handly — Tue, 17 Apr 2012 04:19:02 GMT

>on my system running 11.23 in the /etc/default/cron the entry "DISABLE_MAXJOB_LIMIT " is not there:

Right. It is only supported on 11.31.

>And now the system is rescheduling entries :

I thought you said you fixed it?

Are you really having 100 crontab entries firing off at exactly the same time? (Or overlapping?)

Re: crontab entry do not run on PM hours

NDO — Tue, 17 Apr 2012 06:19:43 GMT

I thought I fixed, but not. And I am not having 100 crontab entries. For root 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.

Re: crontab entry do not run on PM hours

Dennis Handly — Tue, 17 Apr 2012 18:25:26 GMT

>And I am not having 100 crontab entries. For root there are 17 entries, 10 for root and 7 for a user.

queuedefs(4) says the max of all of simultaneous crontab, at AND batch is 100.

>but on my queuedefs file there is not a "c" line.

I suppose you could add one and specify "10w" to wait 10 seconds.