[Bugs] [Bug 1198076] CIFS: [USS]: After upgrade gluster volume status command times out if 256 snapshots preexists

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1198076



--- Comment #2 from Avra Sengupta <asengupt at redhat.com> ---
RCA: If a node that is running 256 bricks, and on which quotad is enabled, is
restarted, the 256 bricks spawn first, followed by quotad. The bricks after
spawning request glusterd for a volfile, and so does quotad. Initially a few
bricks which were started first do receive the volfile, after which they try to
communicate to quotad, but fail to do so as quotad is performing a blocking
connect to glusterd and still waiting to recieve the volfile. glusterd
meanwhile tries to repeatedly connect to the bricks it sent the volfile to, but
fails to do so coz the bricks are still waiting on quotad. So we end up with a
system where glusterd is waiting on some bricks, which are waiting on quotad,
and quotad along with the rest of the bricks are waiting on glusterd.

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