Description of problem:
glusterd related core observed while running automated suite for nfs-ganesha.

Version-Release number of selected component (if applicable):
glusterfs-3.7.9-1
ganesha-2.3.1-3

How reproducible:
Once

Steps to Reproduce:
1.Create a 4 node cluster and configure ganesha on it.
2.Not sure of the exact steps which caused this issue but i was executing gluster operations test cases on ganesha  configuration. 
3.below trace has been observed

(gdb) bt
#0  0x00007f56eb9130ad in rcu_read_lock_bp () from /lib64/liburcu-bp.so.1
#1  0x00007f56ebede320 in __glusterd_peer_rpc_notify (rpc=rpc@entry=0x7f56f8b6c8b0, mydata=mydata@entry=0x7f56f8b6c1f0,
    event=event@entry=RPC_CLNT_DISCONNECT, data=data@entry=0x0) at glusterd-handler.c:5144
#2  0x00007f56ebed3eec in glusterd_big_locked_notify (rpc=0x7f56f8b6c8b0, mydata=0x7f56f8b6c1f0, event=RPC_CLNT_DISCONNECT, data=0x0,
    notify_fn=0x7f56ebede2d0 <__glusterd_peer_rpc_notify>) at glusterd-handler.c:71
#3  0x00007f56f714bbf0 in rpc_clnt_notify (trans=<optimized out>, mydata=0x7f56f8b6c8e0, event=RPC_TRANSPORT_DISCONNECT, data=0x7f56f8b6fa50)
    at rpc-clnt.c:872
#4  0x00007f56f7147823 in rpc_transport_notify (this=this@entry=0x7f56f8b6fa50, event=event@entry=RPC_TRANSPORT_DISCONNECT,
    data=data@entry=0x7f56f8b6fa50) at rpc-transport.c:546
#5  0x00007f56e9369272 in socket_event_poll_err (this=0x7f56f8b6fa50) at socket.c:1152
#6  socket_event_handler (fd=fd@entry=8, idx=idx@entry=2, data=0x7f56f8b6fa50, poll_in=1, poll_out=0, poll_err=<optimized out>) at socket.c:2357
#7  0x00007f56f73de9ca in event_dispatch_epoll_handler (event=0x7f56e751ae80, event_pool=0x7f56f8b02d10) at event-epoll.c:575
#8  event_dispatch_epoll_worker (data=0x7f56f8b16060) at event-epoll.c:678
#9  0x00007f56f61e5dc5 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f56f5b2c1cd in clone () from /lib64/libc.so.6


Actual results:

glusterd related core observed while running automated suite for nfs-ganesha.

Expected results:

there should not be any cores

Additional info:

sos reports will be attached.