[Bugs] [Bug 1388221] New: gluster brick daemon segfaulted in pairs

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1388221

            Bug ID: 1388221
           Summary: gluster brick daemon segfaulted in pairs
           Product: GlusterFS
           Version: 3.8
         Component: unclassified
          Severity: high
          Assignee: bugs at gluster.org
          Reporter: jackie at drive.ai
                CC: bugs at gluster.org



Description of problem:

We are running a distributed replicated volume: 16 pairs of bricks (rep count
2), 2 nodes.

On Friday, 2 pairs of brick daemons seg-faulted within minutes of each other,
leading to 2 subvolumes down (no replicas left).  We tried to bring them up
again by doing a "volume start force”, which worked, but roughly 4 hours later
this happened again, but to two other pairs of bricks.

There is nothing of note in brick logs for the downed bricks, except that it
just suddenly stops logging.  In the other logs (nfs, glusterhd, etc), we
simply start seeing errors saying “All sub volumes down” for those replicates.

This is on Ubuntu 16.04

Version-Release number of selected component (if applicable):
3.8.2

How reproducible:

It happened three rounds in total so far.

Steps to Reproduce:
1. force start volume
2. wait for crash

Additional info:
Core file too large to attach here (60-70M), is there an alternative way to
submit it?

Did not see any stacktraces anywhere.

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