[Bugs] [Bug 1249339] New: Gluster 3.7.3 client fails to mount volume on 3.7.2 servers

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1249339

            Bug ID: 1249339
           Summary: Gluster 3.7.3 client fails to mount volume on 3.7.2
                    servers
           Product: GlusterFS
           Version: 3.7.3
         Component: rpc
          Assignee: bugs at gluster.org
          Reporter: mikedep333 at gmail.com
                CC: bugs at gluster.org, gluster-bugs at redhat.com



Created attachment 1058374
  --> https://bugzilla.redhat.com/attachment.cgi?id=1058374&action=edit
gv-homes-AD.log showing me trying to mount the volume before and after each
server update

Description of problem:

After I upgraded my GlusterFS FUSE client from 3.5.5 to 3.7.3, I unmounted the
gluster volume (/gv-homes-AD). I then attempted to mount it multiple times but
doing so failed.

This error was produced repeatedly in the log
(/var/log/glusterfs/gv-homes-AD.log):
E [rpc-clnt.c:362:saved_frames_unwind] (-->
/lib64/libglusterfs.so.0(_gf_log_callingfn+0x19a)[0x7f169c7e33fa] (-->
/lib64/libgfrpc.so.0(saved_frames_unwind+0x1cf)[0x7f169c5ae4af] (-->
/lib64/libgfrpc.so.0(saved_frames_destroy+0xe)[0x7f169c5ae5ce] (-->
/lib64/libgfrpc.so.0(rpc_clnt_connection_cleanup+0x9c)[0x7f169c5afd9c] (-->
/lib64/libgfrpc.so.0(rpc_clnt_notify+0x48)[0x7f169c5b0548] )))))
0-gv-homes-AD-client-0: forced unwinding frame type(GF-DUMP) op(DUMP(1)) called
at 2015-08-01 16:37:27.513395 (xid=0x3)

Both Gluster servers for the 2-brick replicated volume (I am about to make the
client machine a 3rd replica) were running 3.7.2. JoeJulian on IRC identified
this as likely an RPC bug.

After I updated one of the servers to 3.7.3, the client was able to mount the
volume, but the errors persisted. (The 1st machine to be updated, death-star,
was specified in /etc/fstab).

After I updated the 2nd server, the errors went away. So I am good to go now,
but I am reporting this as a bug/issue.

Version-Release number of selected component (if applicable):
Client is F21 x86_64.
It was running 3.5.5-2.fc21.x86_64 (provided by Fedora.)
Then I updated it to  3.7.3-1.fc21 from download.gluster.org.

Both servers are RHEL 7.1 x86_64.
They were running 3.7.21.el7 from download.gluster.org.
Then I updated them to 3.7.3-1.el7 from download.gluster.org.

How reproducible:
The mount command failed multiple times in a row, but I fixed the issue by
updating the servers.

/etc/fstab line:
death-star:/gv-homes-AD /gv-homes-AD glusterfs acl 0 0

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