Why smbd crashes on RHGS 3.1.1 with samba-vfs 4.1 ?

Issue

• Why smbd crashes on RHGS 3.1.1 with samba-vfs 4.1 ?

~snippet from logs,

smbd[27140]: [2016/01/22 16:58:22.581586,  0] ../lib/util/fault.c:78(fault_report)
Jan 22 16:58:22 node-smb smbd[27140]:  ===============================================================
Jan 22 16:58:22 node-smb smbd[27140]: [2016/01/22 16:58:22.581611,  0] ../lib/util/fault.c:79(fault_report)
Jan 22 16:58:22 node-smb smbd[27140]:  INTERNAL ERROR: Signal 6 in pid 27140 (4.2.3)
Jan 22 16:58:22 node-smb smbd[27140]:  Please read the Trouble-Shooting section of the Samba HOWTO
Jan 22 16:58:22 node-smb smbd[27140]: [2016/01/22 16:58:22.581622,  0] ../lib/util/fault.c:81(fault_report)
Jan 22 16:58:22 node-smb smbd[27140]:  ===============================================================
Jan 22 16:58:22 node-smb smbd[27140]: [2016/01/22 16:58:22.581629,  0] ../source3/lib/util.c:788(smb_panic_s3)
Jan 22 16:58:22 node-smb smbd[27140]:  PANIC (pid 27140): internal error
Jan 22 16:58:22 node-smb smbd[27140]: [2016/01/22 16:58:22.581807,  0] ../source3/lib/util.c:899(log_stack_trace)
Jan 22 16:58:22 node-smb smbd[27140]:  BACKTRACE: 14 stack frames:
Jan 22 16:58:22 node-smb smbd[27140]:   #0 /lib64/libsmbconf.so.0(log_stack_trace+0x1a) [0x7f2db2310cea]
Jan 22 16:58:22 node-smb smbd[27140]:   #1 /lib64/libsmbconf.so.0(smb_panic_s3+0x20) [0x7f2db2310dc0]
Jan 22 16:58:22 node-smb smbd[27140]:   #2 /lib64/libsamba-util.so.0(smb_panic+0x2f) [0x7f2db41608cf]
Jan 22 16:58:22 node-smb smbd[27140]:   #3 /lib64/libsamba-util.so.0(+0x1aae6) [0x7f2db4160ae6]
Jan 22 16:58:22 node-smb smbd[27140]:   #4 /lib64/libpthread.so.0(+0xf100) [0x7f2db4389100]
Jan 22 16:58:22 node-smb smbd[27140]:   #5 /lib64/libc.so.6(gsignal+0x37) [0x7f2db09bf5f7]
Jan 22 16:58:22 node-smb smbd[27140]:   #6 /lib64/libc.so.6(abort+0x148) [0x7f2db09c0ce8]
Jan 22 16:58:22 node-smb smbd[27140]:   #7 /lib64/libc.so.6(+0x75317) [0x7f2db09ff317]
Jan 22 16:58:22 node-smb smbd[27140]:   #8 /lib64/libc.so.6(+0x7cfe1) [0x7f2db0a06fe1]
Jan 22 16:58:22 node-smb smbd[27140]:   #9 /lib64/libglusterfs.so.0(gf_timer_call_cancel+0x52) [0x7f2d9bc77652]
Jan 22 16:58:22 node-smb smbd[27140]:   #10 /lib64/libglusterfs.so.0(gf_log_inject_timer_event+0x37) [0x7f2d9bc58de7]
Jan 22 16:58:22 node-smb smbd[27140]:   #11 /lib64/libglusterfs.so.0(gf_timer_proc+0x10b) [0x7f2d9bc7781b]
Jan 22 16:58:22 node-smb smbd[27140]:   #12 /lib64/libpthread.so.0(+0x7dc5) [0x7f2db4381dc5]
Jan 22 16:58:22 node-smb smbd[27140]:   #13 /lib64/libc.so.6(clone+0x6d) [0x7f2db0a8021d]
Jan 22 16:58:22 node-smb smbd[27140]: [2016/01/22 16:58:22.582688,  0] ../source3/lib/dumpcore.c:318(dump_core)
Jan 22 16:58:22 node-smb smbd[27140]:  dumping core in /var/log/samba/cores/smbd