[Gluster-devel] Regarding regression failure in rackspace-regression-2GB machine

[Shyamsundar Ranganathan]

KP,

One way to view relevant information from the core would be as follow,

1) before loading the core you need to tell gdb to look for shared objects in a different path,

- using 'set solib-search-path'
- For us this translates to 'set solib-search-path ./lib:./lib/glusterfs:./lib/glusterfs/3.5git:./lib/glusterfs/3.5git/auth:./lib/glusterfs/3.5git/rpc-transport:./lib/glusterfs/3.5git/xlator:./lib/glusterfs/3.5git/xlator/cluster:./lib/glusterfs/3.5git/xlator/debug:./lib/glusterfs/3.5git/xlator/encryption:./lib/glusterfs/3.5git/xlator/features:./lib/glusterfs/3.5git/xlator/features/glupy:./lib/glusterfs/3.5git/xlator/mgmt:./lib/glusterfs/3.5git/xlator/mount:./lib/glusterfs/3.5git/xlator/nfs:./lib/glusterfs/3.5git/xlator/performance:./lib/glusterfs/3.5git/xlator/protocol:./lib/glusterfs/3.5git/xlator/storage:./lib/glusterfs/3.5git/xlator/system:./lib/glusterfs/3.5git/xlator/testing:./lib/glusterfs/3.5git/xlator/testing/features:./lib/glusterfs/3.5git/xlator/testing/performance:./lib/ocf:./lib/ocf/resource.d:./lib/ocf/resource.d/glusterfs:./lib/pkgconfig:./lib/python2.6:./lib/python2.6/site-packages:./lib/python2.6/site-packages/gluster'

I know the above is more than what you need to debug glusterd (which is the current cored process), but as you do not know which binary crashed, better to add all from a more generic standpoint.

This would be done starting a vanilla gdb session and entering the command there before opening the core.

NOTE: here my pwd (or resolution of . in ./lib/--- is where I untarred the core tarball and /<untar location>/build/install/ so that it searches all shared objects from the jenkins system that was bundled into the tar file.

2) load the core file in gdb now as follows (or other methods known),
- (gdb) target exec ./sbin/glusterd
- (gdb) target core ./cores/core.1077
- (gdb) bt, other commands and enjoy for the most part!

Shyam

----- Original Message -----
> From: "Krishnan Parthasarathi" <kparthas at redhat.com>
> To: "Pranith Kumar Karampuri" <pkarampu at redhat.com>
> Cc: "Gluster Devel" <gluster-devel at gluster.org>
> Sent: Thursday, June 19, 2014 5:52:42 AM
> Subject: [Gluster-devel] Regarding regression failure in	rackspace-regression-2GB machine
> 
> Pranith,
> 
> The core's backtrace [1] is not 'analysable'. It doesn't show function names
> and displays "()?" for all the frames across all threads. It would be helpful
> if we had the glusterd logs corresponding to cluster.rc setup. These logs
> are missing too.
> 
> thanks,
> Krish
> 
> 
> [1] - glusterd core file can be found here -
> http://build.gluster.org/job/rackspace-regression-2GB/250/consoleFull
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