Description of problem:
Segmentation fault in glusterd.

Version-Release number of selected component (if applicable):
# rpm -qa | grep gluster
gluster-nagios-common-0.2.4-1.el7rhgs.noarch
glusterfs-client-xlators-3.12.2-18.el7rhgs.x86_64
glusterfs-geo-replication-3.12.2-18.el7rhgs.x86_64
glusterfs-3.12.2-18.el7rhgs.x86_64
glusterfs-fuse-3.12.2-18.el7rhgs.x86_64
gluster-nagios-addons-0.2.10-2.el7rhgs.x86_64
vdsm-gluster-4.19.43-2.3.el7rhgs.noarch
pcp-pmda-gluster-4.1.0-0.201805281909.git68ab4b18.el7.x86_64
glusterfs-cli-3.12.2-18.el7rhgs.x86_64
glusterfs-api-3.12.2-18.el7rhgs.x86_64
glusterfs-server-3.12.2-18.el7rhgs.x86_64
libvirt-daemon-driver-storage-gluster-3.9.0-14.el7_5.7.x86_64
python2-gluster-3.12.2-18.el7rhgs.x86_64
glusterfs-rdma-3.12.2-18.el7rhgs.x86_64
glusterfs-libs-3.12.2-18.el7rhgs.x86_64
glusterfs-debuginfo-3.12.2-18.el7rhgs.x86_64

How reproducible:
unknown. Happened during normal operation

Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:


Additional info:

Backtrace:
Core was generated by `/usr/sbin/glusterd -p /var/run/glusterd.pid --log-level INFO'.
Program terminated with signal 11, Segmentation fault.
#0  glusterd_op_ac_brick_op_failed (event=0x7f44e0e63f40, ctx=0x0) at glusterd-op-sm.c:5606
5606	        ret = glusterd_remove_pending_entry (&opinfo.pending_bricks, ev_ctx->pending_node->node);
Missing separate debuginfos, use: debuginfo-install bzip2-libs-1.0.6-13.el7.x86_64 elfutils-libelf-0.170-4.el7.x86_64 elfutils-libs-0.170-4.el7.x86_64 keyutils-libs-1.5.8-3.el7.x86_64 krb5-libs-1.15.1-19.el7.x86_64 libattr-2.4.46-13.el7.x86_64 libcap-2.22-9.el7.x86_64 libcom_err-1.42.9-12.el7_5.x86_64 libselinux-2.5-12.el7.x86_64 libsepol-2.5-8.1.el7.x86_64 pcre-8.32-17.el7.x86_64 systemd-libs-219-57.el7_5.1.x86_64 xz-libs-5.2.2-1.el7.x86_64
(gdb) bt
#0  glusterd_op_ac_brick_op_failed (event=0x7f44e0e63f40, ctx=0x0) at glusterd-op-sm.c:5606
#1  0x00007f452e3afc9f in glusterd_op_sm () at glusterd-op-sm.c:8391
#2  0x00007f452e3e357c in __glusterd_commit_op_cbk (req=req@entry=0x7f4516afc4a0, iov=iov@entry=0x7f4516afc4e0, count=count@entry=1, myframe=myframe@entry=0x7f4516af5300)
    at glusterd-rpc-ops.c:1468
#3  0x00007f452e3e50ea in glusterd_big_locked_cbk (req=0x7f4516afc4a0, iov=0x7f4516afc4e0, count=1, myframe=0x7f4516af5300, fn=0x7f452e3e3070 <__glusterd_commit_op_cbk>)
    at glusterd-rpc-ops.c:223
#4  0x00007f45396d1960 in rpc_clnt_handle_reply (clnt=clnt@entry=0x55d93a0d4d70, pollin=pollin@entry=0x7f44e0e03e40) at rpc-clnt.c:778
#5  0x00007f45396d1d03 in rpc_clnt_notify (trans=<optimized out>, mydata=0x55d93a0d4da0, event=<optimized out>, data=0x7f44e0e03e40) at rpc-clnt.c:971
#6  0x00007f45396cda73 in rpc_transport_notify (this=this@entry=0x55d93a0d4f40, event=event@entry=RPC_TRANSPORT_MSG_RECEIVED, data=data@entry=0x7f44e0e03e40) at rpc-transport.c:538
#7  0x00007f452b5db566 in socket_event_poll_in (this=this@entry=0x55d93a0d4f40, notify_handled=notify_handled@entry=_gf_false) at socket.c:2315
#8  0x00007f452b5de242 in socket_poller (ctx=0x55d93a0d4f40) at socket.c:2590
#9  0x00007f4538768dd5 in start_thread (arg=0x7f45197fa700) at pthread_create.c:308
#10 0x00007f4538031b3d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) p ev_ctx
$1 = (glusterd_op_brick_rsp_ctx_t *) 0x0
(gdb) p *event
$2 = {list = {next = 0x7f44e0e63f40, prev = 0x7f44e0e63f40}, ctx = 0x0, event = GD_OP_EVENT_RCVD_RJT, 
  txn_id = "\016\243\267]\037\370Kd\217\027\313\363\212\367\370", <incomplete sequence \364>}


== glusterd.log:
[2018-10-15 18:47:36.539047] I [MSGID: 106494] [glusterd-handler.c:3103:__glusterd_handle_cli_profile_volume] 0-management: Received volume profile req for volume gluster_shared_storage
[2018-10-15 18:47:36.666572] E [MSGID: 106524] [glusterd-op-sm.c:2104:glusterd_op_stage_stats_volume] 0-glusterd: Profile on Volume gluster_shared_storage is not started
[2018-10-15 18:48:10.048205] E [MSGID: 106430] [glusterd-utils.c:565:glusterd_submit_reply] 0-glusterd: Reply submission failed
[2018-10-15 18:49:35.967695] I [MSGID: 106488] [glusterd-handler.c:1559:__glusterd_handle_cli_get_volume] 0-management: Received get vol req
[2018-10-15 18:49:36.431171] I [MSGID: 106494] [glusterd-handler.c:3103:__glusterd_handle_cli_profile_volume] 0-management: Received volume profile req for volume gluster_shared_storage
[2018-10-15 18:49:36.600248] E [MSGID: 106524] [glusterd-op-sm.c:2104:glusterd_op_stage_stats_volume] 0-glusterd: Profile on Volume gluster_shared_storage is not started
[2018-10-15 18:49:36.600290] E [MSGID: 106301] [glusterd-op-sm.c:4756:glusterd_op_ac_send_stage_op] 0-management: Staging of operation 'Volume Profile' failed on localhost : Profile on Volum
e gluster_shared_storage is not started
[2018-10-15 18:49:37.029217] I [MSGID: 106494] [glusterd-handler.c:3103:__glusterd_handle_cli_profile_volume] 0-management: Received volume profile req for volume supervole1a01
[2018-10-15 18:49:37.029342] W [glusterd-locks.c:622:glusterd_mgmt_v3_lock] (-->/usr/lib64/glusterfs/3.12.2/xlator/mgmt/glusterd.so(+0x258eb) [0x7f452e3938eb] -->/usr/lib64/glusterfs/3.12.2/
xlator/mgmt/glusterd.so(+0x25148) [0x7f452e393148] -->/usr/lib64/glusterfs/3.12.2/xlator/mgmt/glusterd.so(+0xe96e6) [0x7f452e4576e6] ) 0-management: Lock for supervole1a01 held by c1fb8d2e-f
3b7-498a-a11c-c4d79d061f2c
[2018-10-15 18:49:37.029369] E [MSGID: 106119] [glusterd-handler.c:803:glusterd_op_txn_begin] 0-management: Unable to acquire lock for supervole1a01
[2018-10-15 18:49:37.611858] I [MSGID: 106494] [glusterd-handler.c:3103:__glusterd_handle_cli_profile_volume] 0-management: Received volume profile req for volume supervole1a03
The message "I [MSGID: 106488] [glusterd-handler.c:1559:__glusterd_handle_cli_get_volume] 0-management: Received get vol req" repeated 3 times between [2018-10-15 18:49:35.967695] and [2018-
10-15 18:49:35.980367]
[2018-10-15 18:50:35.931571] I [MSGID: 106488] [glusterd-handler.c:1559:__glusterd_handle_cli_get_volume] 0-management: Received get vol req
[2018-10-15 18:50:37.541527] I [MSGID: 106494] [glusterd-handler.c:3103:__glusterd_handle_cli_profile_volume] 0-management: Received volume profile req for volume supervole1a01
[2018-10-15 18:50:37.542017] W [glusterd-locks.c:622:glusterd_mgmt_v3_lock] (-->/usr/lib64/glusterfs/3.12.2/xlator/mgmt/glusterd.so(+0x258eb) [0x7f452e3938eb] -->/usr/lib64/glusterfs/3.12.2/
xlator/mgmt/glusterd.so(+0x25148) [0x7f452e393148] -->/usr/lib64/glusterfs/3.12.2/xlator/mgmt/glusterd.so(+0xe96e6) [0x7f452e4576e6] ) 0-management: Lock for supervole1a01 held by c1fb8d2e-f
3b7-498a-a11c-c4d79d061f2c
[2018-10-15 18:50:37.542040] E [MSGID: 106119] [glusterd-handler.c:803:glusterd_op_txn_begin] 0-management: Unable to acquire lock for supervole1a01
[2018-10-15 18:50:37.984898] I [MSGID: 106494] [glusterd-handler.c:3103:__glusterd_handle_cli_profile_volume] 0-management: Received volume profile req for volume supervole1a03
[2018-10-15 18:50:37.985003] W [glusterd-locks.c:622:glusterd_mgmt_v3_lock] (-->/usr/lib64/glusterfs/3.12.2/xlator/mgmt/glusterd.so(+0x258eb) [0x7f452e3938eb] -->/usr/lib64/glusterfs/3.12.2/
xlator/mgmt/glusterd.so(+0x25148) [0x7f452e393148] -->/usr/lib64/glusterfs/3.12.2/xlator/mgmt/glusterd.so(+0xe96e6) [0x7f452e4576e6] ) 0-management: Lock for supervole1a03 held by c1fb8d2e-f
3b7-498a-a11c-c4d79d061f2c
[2018-10-15 18:50:37.985024] E [MSGID: 106119] [glusterd-handler.c:803:glusterd_op_txn_begin] 0-management: Unable to acquire lock for supervole1a03
[2018-10-15 18:50:38.106949] I [glusterd-locks.c:732:gd_mgmt_v3_unlock_timer_cbk] 0-management: In gd_mgmt_v3_unlock_timer_cbk
[2018-10-15 18:51:08.444708] E [MSGID: 106279] [glusterd-rpc-ops.c:1387:__glusterd_commit_op_cbk] 0-management: Received commit RJT from uuid: 721f68c8-5468-4776-bc2a-9f14c4250054
[2018-10-15 18:51:08.444818] E [glusterd-op-sm.c:5603:glusterd_op_ac_brick_op_failed] (-->/usr/lib64/glusterfs/3.12.2/xlator/mgmt/glusterd.so(+0x7557c) [0x7f452e3e357c] -->/usr/lib64/gluster
fs/3.12.2/xlator/mgmt/glusterd.so(+0x41c9f) [0x7f452e3afc9f] -->/usr/lib64/glusterfs/3.12.2/xlator/mgmt/glusterd.so(+0x41576) [0x7f452e3af576] ) 0-: Assertion failed: ctx
The message "I [MSGID: 106488] [glusterd-handler.c:1559:__glusterd_handle_cli_get_volume] 0-management: Received get vol req" repeated 3 times between [2018-10-15 18:50:35.931571] and [2018-
10-15 18:50:35.937377]
pending frames:
frame : type(0) op(0)
frame : type(0) op(0)
frame : type(0) op(0)
frame : type(0) op(0)
frame : type(0) op(0)
frame : type(0) op(0)
frame : type(0) op(0)
frame : type(0) op(0)
frame : type(0) op(0)
frame : type(0) op(0)
frame : type(0) op(0)
frame : type(0) op(0)
patchset: git://git.gluster.org/glusterfs.git
signal received: 11
time of crash: 
2018-10-15 18:51:08
configuration details:
argp 1
backtrace 1
dlfcn 1
libpthread 1
llistxattr 1
setfsid 1
spinlock 1
epoll.h 1
xattr.h 1
st_atim.tv_nsec 1
package-string: glusterfs 3.12.2
/lib64/libglusterfs.so.0(_gf_msg_backtrace_nomem+0xa0)[0x7f4539909cc0]
/lib64/libglusterfs.so.0(gf_print_trace+0x334)[0x7f4539913c04]
/lib64/libc.so.6(+0x36280)[0x7f4537f69280]
/usr/lib64/glusterfs/3.12.2/xlator/mgmt/glusterd.so(+0x41397)[0x7f452e3af397]
/usr/lib64/glusterfs/3.12.2/xlator/mgmt/glusterd.so(+0x41c9f)[0x7f452e3afc9f]
/usr/lib64/glusterfs/3.12.2/xlator/mgmt/glusterd.so(+0x7557c)[0x7f452e3e357c]
/usr/lib64/glusterfs/3.12.2/xlator/mgmt/glusterd.so(+0x770ea)[0x7f452e3e50ea]
/lib64/libgfrpc.so.0(rpc_clnt_handle_reply+0x90)[0x7f45396d1960]
/lib64/libgfrpc.so.0(rpc_clnt_notify+0x2a3)[0x7f45396d1d03]
/lib64/libgfrpc.so.0(rpc_transport_notify+0x23)[0x7f45396cda73]
/usr/lib64/glusterfs/3.12.2/rpc-transport/socket.so(+0x7566)[0x7f452b5db566]
/usr/lib64/glusterfs/3.12.2/rpc-transport/socket.so(+0xa242)[0x7f452b5de242]
/lib64/libpthread.so.0(+0x7dd5)[0x7f4538768dd5]
/lib64/libc.so.6(clone+0x6d)[0x7f4538031b3d]
---------