On 06/01/2015 02:23 PM, Venky Shankar wrote:
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.
OK. This is not a straight forward crash. The crash is due to a race
between CHILD_UP (marking the subvolume as "up" and initializing
essential structures _later_) and reconfigure() which tries to access
structures which are yet to be initialized.
For now we can induce delay before invoking reconfigure() {"pause" in
the test case} and work on a proper fix for this.
Thoughts?
-Venky
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