[Bugs] [Bug 1206134] glusterd :- after volume create command time out, deadlock has been observed among glusterd and all command keep failing with error "Another transaction is in progress"

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1206134



--- Comment #6 from Anand Avati <aavati at redhat.com> ---
COMMIT: http://review.gluster.org/9613 committed in master by Vijay Bellur
(vbellur at redhat.com) 
------
commit d448fd187dde46bfb0d20354613912f6aa477904
Author: Krishnan Parthasarathi <kparthas at redhat.com>
Date:   Mon Feb 9 17:10:49 2015 +0530

    rpc: fix deadlock when unref is inside conn->lock

    In ping-timer implementation, the timer event takes a ref on the rpc
    object. This ref needs to be removed after every timeout event.
    ping-timer mechanism could be holding the last ref. For e.g, when a peer
    is detached and its rpc object was unref'd. In this case, ping-timer
    mechanism would try to acquire conn->mutex to perform the 'last' unref
    while being inside the critical section already. This will result in a
    deadlock.

    Change-Id: I74f80dd08c9348bd320a1c6d12fc8cd544fa4aea
    BUG: 1206134
    Signed-off-by: Krishnan Parthasarathi <kparthas at redhat.com>
    Reviewed-on: http://review.gluster.org/9613
    Tested-by: Gluster Build System <jenkins at build.gluster.com>
    Reviewed-by: Vijay Bellur <vbellur at redhat.com>

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