Thread error in the cache evacuation feature
--------------------------------------------
Key: TS-971
URL: https://issues.apache.org/jira/browse/TS-971
Project: Traffic Server
Issue Type: Bug
Reporter: mohan_zl
After fix the Bug TS-970, i go on testing the evacuate feature for the cache,
with the same environment and test methods, and this time, trafficserver crash
in another codes, somewhat strange.
{code}
(gdb) bt
#0 0x0000003639c30265 in raise () from /lib64/libc.so.6
#1 0x0000003639c31d10 in abort () from /lib64/libc.so.6
#2 0x00002b9258e7e6fa in ink_die_die_die (retval=Could not find the frame base
for "ink_die_die_die".
) at ink_error.cc:43
#3 0x00002b9258e7e979 in ink_fatal_va (return_code=Could not find the frame
base for "ink_fatal_va".
) at ink_error.cc:65
#4 0x00002b9258e7eb46 in ink_fatal (return_code=Could not find the frame base
for "ink_fatal".
) at ink_error.cc:73
#5 0x00002b9258e7c97a in _ink_assert (a=Could not find the frame base for
"_ink_assert".
) at ink_assert.cc:44
#6 0x00000000004f45df in EThread::schedule (this=0x2aaaabe9c010,
e=0x2aaab4325e00, fast_signal=true)
at ../../iocore/eventsystem/P_UnixEThread.h:96
#7 0x00000000006496db in EThread::schedule_imm_signal (this=0x2aaaabe9c010,
cont=0x302b948, callback_event=1, cookie=0x0)
at ../../iocore/eventsystem/P_UnixEThread.h:62
#8 0x00000000006c4427 in aio_thread_main (arg=0x2aaaac0d1820) at AIO.cc:528
#9 0x00000000006c4afa in AIOThreadInfo::start (this=0x2aaaac0d1820, event=1,
e=0x2a05650) at AIO.cc:188
#10 0x00000000004d3789 in Continuation::handleEvent (this=0x2aaaac0d1820,
event=1, data=0x2a05650) at I_Continuation.h:146
#11 0x00000000006f705b in EThread::execute (this=0x2aaaabe9c010) at
UnixEThread.cc:289
#12 0x00000000006f6307 in spawn_thread_internal (a=0x2aaaac0d1870) at
Thread.cc:88
#13 0x000000363a8064a7 in start_thread () from /lib64/libpthread.so.0
#14 0x0000003639cd3c2d in clone () from /lib64/libc.so.6
(gdb) f 8
#8 0x00000000006c4427 in aio_thread_main (arg=0x2aaaac0d1820) at AIO.cc:528
528 op->thread->schedule_imm_signal(op);
(gdb) p *op
$1 = {<Continuation> = {<force_VFPT_to_top> = {_vptr.force_VFPT_to_top =
0x760710},
handler = 0x68a4f6 <AIOCallbackInternal::io_complete(int, void*)>,
handler_name = 0x75dfb0 "&AIOCallbackInternal::io_complete", mutex = {
m_ptr = 0x2aaaac261f70}, link = {<SLink<Continuation>> = {next = 0x0},
prev = 0x0}}, aiocb = {aio_fildes = 38, aio_buf = 0x2aabd80db000,
aio_nbytes = 3072, aio_offset = 3359854592, aio_reqprio = 0, aio_lio_opcode
= 1, aio_state = 0, aio__pad = {0}}, action = {_vptr.Action = 0x0,
continuation = 0x302b7c0, mutex = {m_ptr = 0x2aaaac261f70}, cancelled = 0},
thread = 0x2aaaabe9c010, then = 0x0, aio_result = 3072}
(gdb) p ((CacheVC *)op->action->continuation)->io->aiocb
$1 = {aio_fildes = 38, aio_buf = 0x2aabd80db000, aio_nbytes = 3072, aio_offset
= 3359854592, aio_reqprio = 0, aio_lio_opcode = 1, aio_state = 0,
aio__pad = {0}}
(gdb) p ((CacheVC *)op->action->continuation)->handler_name
$2 = 0x75f372 "&CacheVC::handleReadDone"
(gdb) p ((CacheVC *)op->action->continuation)->f.evacuator
$3 = 1
(gdb) p ((CacheVC *)op->action->continuation)->save_handler
$4 = 0x6afe9e <CacheVC::evacuateReadHead(int, Event*)>
(gdb) f 6
#6 0x00000000004f45df in EThread::schedule (this=0x2aaaabe9c010,
e=0x2aaab4325e00, fast_signal=true)
at ../../iocore/eventsystem/P_UnixEThread.h:96
96 ink_assert(tt == REGULAR);
(gdb) p tt
$2 = DEDICATED
{code}
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