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* Previously, attempts to start an MRG Messaging (MRG-M) broker caused rgmanager to terminate unexpectedly with a segmentation fault. This was caused by subtle memory corruption introduced by calling pthread_mutex_unlock() on a mutual exclusion that was not locked. This update adresses scenarios where memory could be corrupted when calling pthread_mutex_unlock(), and crashes no longer occur in the described scenario.
Created attachment 771875[details]
abrt output (core dump)
Description of problem: rgmanager dumps core while starting up an HA MRG-M broker
Version-Release number of selected component (if applicable):
rgmanager-3.0.12.1-17.el6.x86_64
How reproducible:
Only once, so far
Steps to Reproduce:
1. Attempt to start MRG broker (e.g. /usr/sbin/clusvcadm -e BR.0 -m hostname)
2.
3.
Actual results:
rgmanager crashes
Expected results:
rgmanager starts services normally
Additional info:
uname -a:
Linux omhq1adf 2.6.32-220.7.1.el6.x86_64 #1 SMP Fri Feb 10 15:22:22 EST 2012 x86_64 x86_64 x86_64 GNU/Linux
Created attachment 774281[details]
another abrt core dump
I've added two additional core dumps after seeing this behavior repeated. Consider upping the frequency of the defect.
I'll contact the customer to determine if this is feasible. Although, I don't have a reliable reproducer either way. rgmanager has cored 5 times out of several hundred over the last week, so it is still intermittent at best.
(In reply to Ryan McCabe from comment #5)
> Are you able to try a test package with a proposed fix?
Yes, the customer is agreeable. We'll try out the test package you provide.
(In reply to Chester Knapp from comment #7)
> (In reply to Ryan McCabe from comment #5)
> > Are you able to try a test package with a proposed fix?
>
> Yes, the customer is agreeable. We'll try out the test package you provide.
You can grab the build from https://brewweb.devel.redhat.com/buildinfo?buildID=282334
Let me know how it goes.
Thanks for testing!
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
http://rhn.redhat.com/errata/RHBA-2013-1600.html
Created attachment 771875 [details] abrt output (core dump) Description of problem: rgmanager dumps core while starting up an HA MRG-M broker Version-Release number of selected component (if applicable): rgmanager-3.0.12.1-17.el6.x86_64 How reproducible: Only once, so far Steps to Reproduce: 1. Attempt to start MRG broker (e.g. /usr/sbin/clusvcadm -e BR.0 -m hostname) 2. 3. Actual results: rgmanager crashes Expected results: rgmanager starts services normally Additional info: uname -a: Linux omhq1adf 2.6.32-220.7.1.el6.x86_64 #1 SMP Fri Feb 10 15:22:22 EST 2012 x86_64 x86_64 x86_64 GNU/Linux