[Bugs] [Bug 1450698] New: a core generated when running regression test ./tests/ bugs/core/bug-1432542-mpx-restart-crash.t

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1450698

            Bug ID: 1450698
           Summary: a core generated when running regression test
                    ./tests/bugs/core/bug-1432542-mpx-restart-crash.t
           Product: GlusterFS
           Version: mainline
         Component: distribute
          Assignee: bugs at gluster.org
          Reporter: johnzzpcrystal at gmail.com
                CC: bugs at gluster.org



Description of problem:
a core generated when running centos regressions for
https://review.gluster.org/#/c/17280/3

The jenkins link :
https://build.gluster.org/job/centos6-regression/4583/consoleFull

the core backtrace info :

(gdb) bt
#0  0x00007fe7b7d69bf1 in dht_selfheal_dir_mkdir_lookup_done
(frame=0x7fe7a8002d70, this=0x7fe7b80115b0)
    at
/home/jenkins/root/workspace/centos6-regression/xlators/cluster/dht/src/dht-selfheal.c:1338
#1  0x00007fe7b7d6a382 in dht_selfheal_dir_mkdir_lookup_cbk
(frame=0x7fe7a8002d70, cookie=0x7fe7b800f290, this=0x7fe7b80115b0, op_ret=-1, 
    op_errno=2, inode=0x7fe7a80065a0, stbuf=0x7fe7b7213840, xattr=0x0,
postparent=0x7fe7b72137d0)
    at
/home/jenkins/root/workspace/centos6-regression/xlators/cluster/dht/src/dht-selfheal.c:1425
#2  0x00007fe7bc0a18ec in client3_3_lookup_cbk (req=0x7fe7ac009600,
iov=0x7fe7ac009640, count=1, myframe=0x7fe7ac031b30)
    at
/home/jenkins/root/workspace/centos6-regression/xlators/protocol/client/src/client-rpc-fops.c:2867
#3  0x00007fe7c972484d in rpc_clnt_handle_reply (clnt=0x7fe7b80269a0,
pollin=0x7fe7ac006180)
    at
/home/jenkins/root/workspace/centos6-regression/rpc/rpc-lib/src/rpc-clnt.c:778
#4  0x00007fe7c9724e17 in rpc_clnt_notify (trans=0x7fe7b8026bd0,
mydata=0x7fe7b80269d0, event=RPC_TRANSPORT_MSG_RECEIVED, data=0x7fe7ac006180)
    at
/home/jenkins/root/workspace/centos6-regression/rpc/rpc-lib/src/rpc-clnt.c:971
#5  0x00007fe7c9720dac in rpc_transport_notify (this=0x7fe7b8026bd0,
event=RPC_TRANSPORT_MSG_RECEIVED, data=0x7fe7ac006180)
    at
/home/jenkins/root/workspace/centos6-regression/rpc/rpc-lib/src/rpc-transport.c:538
#6  0x00007fe7be50658a in socket_event_poll_in (this=0x7fe7b8026bd0,
notify_handled=_gf_true)
    at
/home/jenkins/root/workspace/centos6-regression/rpc/rpc-transport/socket/src/socket.c:2315
#7  0x00007fe7be506bd5 in socket_event_handler (fd=14, idx=4, gen=4,
data=0x7fe7b8026bd0, poll_in=1, poll_out=0, poll_err=0)
    at
/home/jenkins/root/workspace/centos6-regression/rpc/rpc-transport/socket/src/socket.c:2467
#8  0x00007fe7c99d025e in event_dispatch_epoll_handler (event_pool=0x18b6fc0,
event=0x7fe7b7213e70)
    at
/home/jenkins/root/workspace/centos6-regression/libglusterfs/src/event-epoll.c:572
#9  0x00007fe7c99d0560 in event_dispatch_epoll_worker (data=0x7fe7b80216c0)
    at
/home/jenkins/root/workspace/centos6-regression/libglusterfs/src/event-epoll.c:648
#10 0x00007fe7c8c37aa1 in start_thread () from ./lib64/libpthread.so.0
#11 0x00007fe7c859fbcd in clone () from ./lib64/libc.so.6
(gdb) p frame->ref_count 
$4 = -1

the racing thread:
Thread 7 (LWP 3527):
#0  0x00007fe7c8c3f06d in open64 () from ./lib64/libpthread.so.0
#1  0x00007fe7c99e53ac in gf_mkostemp (tmpl=0x7fe7b5e0f7e0 "/tmp/btDBbLPQ",
suffixlen=0, flags=2)
    at
/home/jenkins/root/workspace/centos6-regression/contrib/stdlib/gf_mkostemp.c:96
#2  0x00007fe7c996e00c in gf_backtrace_fillframes (
    buf=0x7fe7a4001890 "(-->
/build/install/lib/libglusterfs.so.0(synctask_yield+0x41)[0x7fe7c99a9d04] (-->
/build/install/lib/libglusterfs.so.0(syncop_readdirp+0x3fd)[0x7fe7c99ac6c5]
(--> /build/install/lib/glusterfs/3.12de"...)
    at
/home/jenkins/root/workspace/centos6-regression/libglusterfs/src/common-utils.c:3916
#3  0x00007fe7c996e1fa in gf_backtrace_save (
    buf=0x7fe7a4001890 "(-->
/build/install/lib/libglusterfs.so.0(synctask_yield+0x41)[0x7fe7c99a9d04] (-->
/build/install/lib/libglusterfs.so.0(syncop_readdirp+0x3fd)[0x7fe7c99ac6c5]
(--> /build/install/lib/glusterfs/3.12de"...)
    at
/home/jenkins/root/workspace/centos6-regression/libglusterfs/src/common-utils.c:3979
#4  0x00007fe7c99a9d04 in synctask_yield (task=0x7fe7a4001400)
    at
/home/jenkins/root/workspace/centos6-regression/libglusterfs/src/syncop.c:336
#5  0x00007fe7c99abe54 in syncop_lookup (subvol=0x7fe7b80115b0,
loc=0x7fe7b5e11b30, iatt=0x7fe7b5e11a10, parent=0x0, xdata_in=0x0, 
    xdata_out=0x0) at
/home/jenkins/root/workspace/centos6-regression/libglusterfs/src/syncop.c:1230
#6  0x00007fe7b7d614dd in gf_defrag_fix_layout (this=0x7fe7b80115b0,
defrag=0x7fe7b80209a0, loc=0x7fe7b5e11d60, fix_layout=0x7fe7a8004c00, 
    migrate_data=0x0) at
/home/jenkins/root/workspace/centos6-regression/xlators/cluster/dht/src/dht-rebalance.c:3650
#7  0x00007fe7b7d617a8 in gf_defrag_fix_layout (this=0x7fe7b80115b0,
defrag=0x7fe7b80209a0, loc=0x7fe7b5e11f30, fix_layout=0x7fe7a8004c00, 
    migrate_data=0x0) at
/home/jenkins/root/workspace/centos6-regression/xlators/cluster/dht/src/dht-rebalance.c:3713
#8  0x00007fe7b7d63332 in gf_defrag_start_crawl (data=0x7fe7b80115b0)
    at
/home/jenkins/root/workspace/centos6-regression/xlators/cluster/dht/src/dht-rebalance.c:4281
#9  0x00007fe7c99a9e31 in synctask_wrap () at
/home/jenkins/root/workspace/centos6-regression/libglusterfs/src/syncop.c:375
#10 0x00007fe7c84fa760 in ?? () from ./lib64/libc.so.6
#11 0x0000000000000000 in ?? ()


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