Description of problem:

While creating snapshot on tiered volume, seeing multiple bricks crashes. 


Version-Release number of selected component (if applicable):

glusterfs-3.7.9-9.el7rhgs.x86_64

How reproducible:

1/1

Steps to Reproduce:
1.
2.
3.

Actual results:



Expected results:


Additional info:

gdb logs :
============================
(gdb) bt
#0  0x00007fd60c9555f7 in raise () from /lib64/libc.so.6
#1  0x00007fd60c956ce8 in abort () from /lib64/libc.so.6
#2  0x00007fd60c995317 in __libc_message () from /lib64/libc.so.6
#3  0x00007fd60ca2dac7 in __fortify_fail () from /lib64/libc.so.6
#4  0x00007fd60ca2bc80 in __chk_fail () from /lib64/libc.so.6
#5  0x00007fd5fb9cceaf in ctr_lookup ()
   from /usr/lib64/glusterfs/3.7.9/xlator/features/changetimerecorder.so
#6  0x00007fd60e26dad8 in default_lookup () from /lib64/libglusterfs.so.0
#7  0x00007fd5faebb36b in br_stub_lookup ()
   from /usr/lib64/glusterfs/3.7.9/xlator/features/bitrot-stub.so
#8  0x00007fd5faca2c75 in posix_acl_lookup ()
   from /usr/lib64/glusterfs/3.7.9/xlator/features/access-control.so
#9  0x00007fd5faa8a667 in pl_lookup () from /usr/lib64/glusterfs/3.7.9/xlator/features/locks.so
#10 0x00007fd5fa8750bf in up_lookup () from /usr/lib64/glusterfs/3.7.9/xlator/features/upcall.so
#11 0x00007fd60e283976 in default_lookup_resume () from /lib64/libglusterfs.so.0
#12 0x00007fd60e2a33dd in call_resume () from /lib64/libglusterfs.so.0
#13 0x00007fd5fa664363 in iot_worker ()
   from /usr/lib64/glusterfs/3.7.9/xlator/performance/io-threads.so
#14 0x00007fd60d0cfdc5 in start_thread () from /lib64/libpthread.so.0
#15 0x00007fd60ca1621d in clone () from /lib64/libc.so.6