[Bugs] [Bug 1145911] New: [SNAPSHOT]: Deletion of a snapshot in a volume or system fails if some operation which acquires the volume lock comes in between.

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1145911

            Bug ID: 1145911
           Summary: [SNAPSHOT]: Deletion of a snapshot in a volume or
                    system fails if some operation which acquires the
                    volume lock comes in between.
           Product: GlusterFS
           Version: 3.6.0
         Component: glusterd
          Severity: high
          Priority: high
          Assignee: gluster-bugs at redhat.com
          Reporter: spandit at redhat.com
                CC: bugs at gluster.org, gluster-bugs at redhat.com
        Depends On: 1126289



+++ This bug was initially created as a clone of Bug #1126289 +++

Description of problem:
gluster snapshot delete volume <volname>
          (or)
gluster snapshot delete all

The above two commands might fail if some operation which acquires the
lock comes in between.

Explanation :
snapshot delete volume <volname> does a multiple RPC when tried to
do deletion of multiple snapshots in a volume. If some other operation
which acquires the lock comes in between, then snapshot delete will fail
with "another transaction in progress" error.


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


How reproducible:
1/1


Steps to Reproduce:
1. issue a snapshot delete volume <volname> (say volname is vol1)
2. when step (1) is in progress, issue another command which takes a lock on
volume vol1

Actual results:
snapshot delete fails with another transaction in progress.

Expected results:
command should not fail. 


Additional info:
Its better to give certain retries before failing.

--- Additional comment from Anand Avati on 2014-08-11 05:47:23 EDT ---

REVIEW: http://review.gluster.org/8454 (glusterd/snapshot : Differentiating
between various error scenario.) posted (#1) for review on master by Sachin
Pandit (spandit at redhat.com)


Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1126289
[Bug 1126289] [SNAPSHOT]: Deletion of a snapshot in a volume or system
fails if some operation which acquires the volume lock comes in between.
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