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Old 07-11-2016, 11:23 PM   #1
moinsobhan
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Registered: May 2016
Posts: 5

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How to manually obtaining core dump from daemons in RHEL6?


Hi,

I have issue with an application as it creates high CPU when I try to copy a zip file. I'm trying to get a daemon process dump for that process but need some help if I'm doing it right. After doing some research and Googled followed the steps below:

1. Set the daemon core ulimit to unlimited by editing /etc/sysconfig/init and added the line below: DAEMON_COREFILE_LIMIT=’unlimited’
2. Disabled ABRT to avoid as it can automatically capture and partially analyze cores. Used the command: # service abrt-ccpp stop
3. Set a location for the core to:
# echo "/var/tmp/core.%e.%p.%t" > /proc/sys/kernel/core_pattern
4.Restart the daemon XX_app:
# service XX_app restart
5.Reproduced the issue
6.Determined the PID of XX_app (say: 2528)
7.To generate the core file used the command: # kill -ABRT 2528

I cannot see any dump created.

Also tried below command and ending up the error:
# gcore [-o dumpname] 2528
core.WVTh55:4: Error in sourced command file:
Illegal process-id: [-o.
gcore: failed to create core. [-o

Would appreciate if someone can help me with this.

Thank you.
+Moin

Last edited by moinsobhan; 07-11-2016 at 11:36 PM.
 
Old 07-12-2016, 02:04 AM   #2
business_kid
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Registered: Jan 2006
Location: Ireland
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Is core dumping enabled in the kernel? A copy of the kernel config is kept in /boot in most distros.
 
Old 07-24-2016, 08:12 PM   #3
moinsobhan
LQ Newbie
 
Registered: May 2016
Posts: 5

Original Poster
Rep: Reputation: Disabled
Resolved: the above steps worked after giving full permission of core location.
 
  


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