Why glusterd crash when try to setup pem-file for non-root geo-replication session in RHGS 3.1 ?

Issue

• The glusterd daemon on primary master node crash when crate push-pem command with force option used to setup pem-file on the slave node.

# gluster volume geo-replication geo-test-master geoaccount@gluster-slave-node1::geo-test-slave create push-pem force

• The /var/log/glusterfs/etc-glusterfs-glusterd.vol.log has below crash stack trace:

[2016-11-28 22:54:35.409311] I [MSGID: 106331] [glusterd-geo-rep.c:3207:glusterd_op_stage_gsync_create] 0-management: Session between geo-test-master and geoaccount@gluster-slave-node1::geo-test-slave is already created. Force creating again.
pending frames:
frame : type(0) op(0)
patchset: git://git.gluster.com/glusterfs.git
signal received: 6
time of crash:
2016-11-28 22:54:35
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 3.7.9
/lib64/libglusterfs.so.0(_gf_msg_backtrace_nomem+0xc2)[0x7fa8530241c2]
/lib64/libglusterfs.so.0(gf_print_trace+0x31d)[0x7fa85304997d]
/lib64/libc.so.6(+0x35670)[0x7fa851710670]
/lib64/libc.so.6(gsignal+0x37)[0x7fa8517105f7]
/lib64/libc.so.6(abort+0x148)[0x7fa851711ce8]
/lib64/libc.so.6(+0x75327)[0x7fa851750327]
/lib64/libc.so.6(__fortify_fail+0x37)[0x7fa8517e9597]
/lib64/libc.so.6(+0x10c750)[0x7fa8517e7750]
/lib64/libc.so.6(+0x10bacb)[0x7fa8517e6acb]
/usr/lib64/glusterfs/3.7.9/xlator/mgmt/glusterd.so(+0xd0afb)[0x7fa847becafb]
/lib64/libglusterfs.so.0(dict_foreach_match+0x77)[0x7fa85301dd87]
/lib64/libglusterfs.so.0(dict_foreach+0x18)[0x7fa85301df28]
/usr/lib64/glusterfs/3.7.9/xlator/mgmt/glusterd.so(glusterd_op_stage_gsync_create+0x1cda)[0x7fa847bfbe8a]
/usr/lib64/glusterfs/3.7.9/xlator/mgmt/glusterd.so(glusterd_op_stage_validate+0xdb)[0x7fa847b88f3b]
/usr/lib64/glusterfs/3.7.9/xlator/mgmt/glusterd.so(gd_stage_op_phase+0x16a)[0x7fa847c1b22a]
/usr/lib64/glusterfs/3.7.9/xlator/mgmt/glusterd.so(gd_sync_task_begin+0x70e)[0x7fa847c1cd5e]
/usr/lib64/glusterfs/3.7.9/xlator/mgmt/glusterd.so(glusterd_op_begin_synctask+0x30)[0x7fa847c1d0a0]
/usr/lib64/glusterfs/3.7.9/xlator/mgmt/glusterd.so(__glusterd_handle_gsync_set+0x628)[0x7fa847bf0028]
/usr/lib64/glusterfs/3.7.9/xlator/mgmt/glusterd.so(glusterd_big_locked_handler+0x30)[0x7fa847b735f0]
/lib64/libglusterfs.so.0(synctask_wrap+0x12)[0x7fa853072262]
/lib64/libc.so.6(+0x47110)[0x7fa851722110]