Created attachment 558547 [details]
One of the brick log.

Description of problem:
Created a striped replicate volume(4 bricks -> 2x2) & ran posix compliance test
from one client & untarred openssl from the other.

Server crashed 2 bricks with same backtrace.

Similar kind of setup was created on Bug 786007, but here write-behind was enabled. Happens regularly.

Core was generated by `/usr/local/sbin/glusterfsd -s localhost --volfile-id vol.dagobah.data-export4 -'.
Program terminated with signal 11, Segmentation fault.
#0  __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:32
32	../sysdeps/x86_64/multiarch/../strlen.S: No such file or directory.
	in ../sysdeps/x86_64/multiarch/../strlen.S
(gdb) bt
#0  __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:32
#1  0x00007fafc489809b in ?? () from /usr/lib/libefence.so.0
#2  0x00007fafc4898431 in EF_Exit () from /usr/lib/libefence.so.0
#3  0x00007fafc4897b53 in memalign () from /usr/lib/libefence.so.0
#4  0x00007fafc4897757 in malloc () from /usr/lib/libefence.so.0
#5  0x00007fafc4aa25b4 in ?? () from /lib64/ld-linux-x86-64.so.2
#6  0x00007fafc4aacb4a in ?? () from /lib64/ld-linux-x86-64.so.2
#7  0x00007fafc4aa8996 in ?? () from /lib64/ld-linux-x86-64.so.2
#8  0x00007fafc4aad37a in ?? () from /lib64/ld-linux-x86-64.so.2
#9  0x00007fafc3d351e0 in do_dlopen (ptr=0x7fafb5132570) at dl-libc.c:86
#10 0x00007fafc4aa8996 in ?? () from /lib64/ld-linux-x86-64.so.2
#11 0x00007fafc3d3529a in dlerror_run (args=0x7fafb5132570, operate=0x7fafc3d351a0 <do_dlopen>) at dl-libc.c:47
#12 __GI___libc_dlopen_mode (name=<optimized out>, mode=<optimized out>) at dl-libc.c:160
#13 0x00007fafc3d108a5 in init () at ../sysdeps/x86_64/../ia64/backtrace.c:41
#14 0x00007fafc3fc4713 in pthread_once () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_once.S:104
#15 0x00007fafc3d1099c in __GI___backtrace (array=<optimized out>, size=200) at ../sysdeps/x86_64/../ia64/backtrace.c:85
#16 0x00007fafc4635d26 in gf_print_trace (signum=11) at ../../../libglusterfs/src/common-utils.c:425
#17 <signal handler called>
#18 __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:32
#19 0x00007fafc489809b in ?? () from /usr/lib/libefence.so.0
#20 0x00007fafc4898431 in EF_Exit () from /usr/lib/libefence.so.0
#21 0x00007fafc4897a79 in memalign () from /usr/lib/libefence.so.0
#22 0x00007fafc4897757 in malloc () from /usr/lib/libefence.so.0
#23 0x00007fafc4897d34 in calloc () from /usr/lib/libefence.so.0
#24 0x00007fafc4654914 in __gf_calloc (nmemb=1, size=32, type=3) at ../../../libglusterfs/src/mem-pool.c:145
#25 0x00007fafc461a468 in get_new_data () at ../../../libglusterfs/src/dict.c:55
#26 0x00007fafc461c10f in data_from_int32 (value=0) at ../../../libglusterfs/src/dict.c:785
#27 0x00007fafc461e3f6 in dict_set_int32 (this=0x7fafacb60fc0, key=0x7fafbe9903e2 "glusterfs.entrylk-count", val=0)
    at ../../../libglusterfs/src/dict.c:1737
#28 0x00007fafbe987547 in pl_entrylk_xattr_fill (this=0x7fafbfa92688, inode=0x7fafbd94b014, dict=0x7fafacb60fc0)
    at ../../../../../xlators/features/locks/src/posix.c:1372
#29 0x00007fafbe9877e4 in pl_lookup_cbk (frame=0x7fafc2b6a654, cookie=0x7fafc2b694dc, this=0x7fafbfa92688, op_ret=0, op_errno=0, 
    inode=0x7fafbd94b014, buf=0x7fafb5133b90, dict=0x7fafacb60fc0, postparent=0x7fafb5133c00)
    at ../../../../../xlators/features/locks/src/posix.c:1434
#30 0x00007fafbeb998de in posix_acl_lookup_cbk (frame=0x7fafc2b694dc, cookie=0x7fafc2b63d84, this=0x7fafbfa5c688, op_ret=0, op_errno=0, 
    inode=0x7fafbd94b014, buf=0x7fafb5133b90, xattr=0x7fafacb60fc0, postparent=0x7fafb5133c00)
---Type <return> to continue, or q <return> to quit---
    at ../../../../../xlators/system/posix-acl/src/posix-acl.c:746
#31 0x00007fafbedad1bf in posix_lookup (frame=0x7fafc2b63d84, this=0x7fafbfa50688, loc=0x7fafc19f6668, xattr_req=0x7fafacdb3fc0)
    at ../../../../../xlators/storage/posix/src/posix.c:162
#32 0x00007fafbeb99d09 in posix_acl_lookup (frame=0x7fafc2b694dc, this=0x7fafbfa5c688, loc=0x7fafc19f6668, xattr=0x7fafacdb3fc0)
    at ../../../../../xlators/system/posix-acl/src/posix-acl.c:798
#33 0x00007fafbe987e55 in pl_lookup (frame=0x7fafc2b6a654, this=0x7fafbfa92688, loc=0x7fafc19f6668, xattr_req=0x7fafacdb3fc0)
    at ../../../../../xlators/features/locks/src/posix.c:1486
#34 0x00007fafbe763f01 in iot_lookup_wrapper (frame=0x7fafc2b69384, this=0x7fafbfaac688, loc=0x7fafc19f6668, xattr_req=0x7fafacdb3fc0)
    at ../../../../../xlators/performance/io-threads/src/io-threads.c:295
#35 0x00007fafc464831a in call_resume_wind (stub=0x7fafc19f6630) at ../../../libglusterfs/src/call-stub.c:2461
#36 0x00007fafc464f419 in call_resume (stub=0x7fafc19f6630) at ../../../libglusterfs/src/call-stub.c:3932
#37 0x00007fafbe7638ef in iot_worker (data=0x7fafbe51fee8) at ../../../../../xlators/performance/io-threads/src/io-threads.c:138
#38 0x00007fafc3fbeefc in start_thread (arg=0x7fafb5134700) at pthread_create.c:304
#39 0x00007fafc3cf989d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#40 0x0000000000000000 in ?? ()
(gdb) f 27
#27 0x00007fafc461e3f6 in dict_set_int32 (this=0x7fafacb60fc0, key=0x7fafbe9903e2 "glusterfs.entrylk-count", val=0)
    at ../../../libglusterfs/src/dict.c:1737
1737	        data = data_from_int32 (val);
(gdb) p val
$1 = 0
(gdb) p data
$2 = (data_t *) 0x0
(gdb) f 25
#25 0x00007fafc461a468 in get_new_data () at ../../../libglusterfs/src/dict.c:55
55	        data = (data_t *) GF_CALLOC (1, sizeof (data_t), gf_common_mt_data_t);
(gdb) p data
$4 = (data_t *) 0x0

I have attached the brick logs.