[Gluster-devel] scrubber crash

[Venky Shankar]

On 06/01/2015 01:09 PM, Anand Nekkunti wrote:
> Hi Venky
>    one of regression test in my patch, I found core dump from scrubber 
> . Please have a look.
>
> Link 
> :http://build.gluster.org/job/rackspace-regression-2GB-triggered/9925/consoleFull
>
> bt fir core ...
>
> (gdb) bt
> #0  0x00007f89d6224731 in gf_tw_mod_timer_pending (base=0xf2fbc0, 
> timer=0x0, expires=233889) at 
> /home/jenkins/root/workspace/rackspace-regression-2GB-triggered/contrib/timer-wheel/timer-wheel.c:239
> #1  0x00007f89c82ce7e8 in br_fsscan_reschedule (this=0x7f89c4008980, 
> child=0x7f89c4011238, fsscan=0x7f89c4012290, fsscrub=0x7f89c4010010, 
> pendingcheck=_gf_true)

The crash happens when scrubber is paused as reconfigure() blindly 
accesses scrubber specific data which is not available _after_ pause.

Thanks for reporting. I'll send a fix for this.

> at 
> /home/jenkins/root/workspace/rackspace-regression-2GB-triggered/xlators/features/bit-rot/src/bitd/bit-rot-scrub.c:703
> #2  0x00007f89c82cc9d4 in reconfigure (this=0x7f89c4008980, 
> options=0x7f89d3bc9558) at 
> /home/jenkins/root/workspace/rackspace-regression-2GB-triggered/xlators/features/bit-rot/src/bitd/bit-rot.c:1673
> #3  0x00007f89d62044cd in xlator_reconfigure_rec 
> (old_xl=0x7f89c4008980, new_xl=0x7f89c409b460) at 
> /home/jenkins/root/workspace/rackspace-regression-2GB-triggered/libglusterfs/src/options.c:1084
> #4  0x00007f89d6204414 in xlator_reconfigure_rec 
> (old_xl=0x7f89c400a6c0, new_xl=0x7f89c409c500) at 
> /home/jenkins/root/workspace/rackspace-regression-2GB-triggered/libglusterfs/src/options.c:1070
> #5  0x00007f89d62045df in xlator_tree_reconfigure 
> (old_xl=0x7f89c400a6c0, new_xl=0x7f89c409c500) at 
> /home/jenkins/root/workspace/rackspace-regression-2GB-triggered/libglusterfs/src/options.c:1112
> #6  0x00007f89d61ec7bd in glusterfs_graph_reconfigure 
> (oldgraph=0x7f89c4001d30, newgraph=0x7f89c4098130) at 
> /home/jenkins/root/workspace/rackspace-regression-2GB-triggered/libglusterfs/src/graph.c:893
> #7  0x00007f89d61ec629 in glusterfs_volfile_reconfigure 
> (oldvollen=932, newvolfile_fp=0x7f89c4097eb0, ctx=0xefe010,
>     oldvolfile=0x7f89c40608c0 "volume patchy-client-0\n    type 
> protocol/client\n    option password 
> 57218e76-6f3a-4f60-8b23-a0bca58c135d\n    option username 
> 3f24264e-5cbc-4be7-a2eb-326d804f8f90\n    option transport-type 
> tcp\n    opti"...) at 
> /home/jenkins/root/workspace/rackspace-regression-2GB-triggered/libglusterfs/src/graph.c:844
> #8  0x000000000040e27d in mgmt_getspec_cbk (req=0xf65c7c, 
> iov=0xf65cbc, count=1, myframe=0x7f89d4005c58) at 
> /home/jenkins/root/workspace/rackspace-regression-2GB-triggered/glusterfsd/src/glusterfsd-mgmt.c:1532
> #9  0x00007f89d5f63e90 in rpc_clnt_handle_reply (clnt=0xf65990, 
> pollin=0x7f89c4060740) at 
> /home/jenkins/root/workspace/rackspace-regression-2GB-triggered/rpc/rpc-lib/src/rpc-clnt.c:761
> #10 0x00007f89d5f642b0 in rpc_clnt_notify (trans=0xf674e0, 
> mydata=0xf659c0, event=RPC_TRANSPORT_MSG_RECEIVED, 
> data=0x7f89c4060740) at 
> /home/jenkins/root/workspace/rackspace-regression-2GB-triggered/rpc/rpc-lib/src/rpc-clnt.c:889
> #11 0x00007f89d5f607e0 in rpc_transport_notify (this=0xf674e0, 
> event=RPC_TRANSPORT_MSG_RECEIVED, data=0x7f89c4060740) at 
> /home/jenkins/root/workspace/rackspace-regression-2GB-triggered/rpc/rpc-lib/src/rpc-transport.c:538
> #12 0x00007f89ca741311 in socket_event_poll_in (this=0xf674e0) at 
> /home/jenkins/root/workspace/rackspace-regression-2GB-triggered/rpc/rpc-transport/socket/src/socket.c:2285 
>
> #13 0x00007f89ca7417cc in socket_event_handler (fd=9, idx=1, 
> data=0xf674e0, poll_in=1, poll_out=0, poll_err=0) at 
> /home/jenkins/root/workspace/rackspace-regression-2GB-triggered/rpc/rpc-transport/socket/src/socket.c:2398
> #14 0x00007f89d620f449 in event_dispatch_epoll_handler 
> (event_pool=0xf1cc10, event=0x7f89c911ae70) at 
> /home/jenkins/root/workspace/rackspace-regression-2GB-triggered/libglusterfs/src/event-epoll.c:567
> #15 0x00007f89d620f7a2 in event_dispatch_epoll_worker (data=0xf686a0) 
> at 
> /home/jenkins/root/workspace/rackspace-regression-2GB-triggered/libglusterfs/src/event-epoll.c:669
> #16 0x00007f89d56ff9d1 in start_thread () from ./lib64/libpthread.so.0
> #17 0x00007f89d50698fd in clone () from ./lib64/libc.so.6
>
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