bneradt opened a new issue, #10670:
URL: https://github.com/apache/trafficserver/issues/10670
We were running ATS 10 on docs and noticed the following assertion being
tripped through metrics:
```sh
cd /var/crash/65534.core
sudo gdb /opt/ats_10/bin/traffic_server CoreDump
...
```
```gdb
(gdb) bt
#0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#1 0x00007f450347d859 in __GI_abort () at abort.c:79
#2 0x000055a230c94b85 in ink_abort (message_format=0x55a230e00484 "%s:%d:
failed assertion `%s`") at ink_error.cc:99
#3 0x000055a230c90bd3 in _ink_assert (expression=0x55a230d35cc3 "metric",
file=0x55a230d35ca7 "../../include/api/Metrics.h", line=158) at ink_assert.cc:37
#4 0x000055a23085a7d3 in ts::Metrics::increment (metric=0x0, val=1) at
../../include/api/Metrics.h:158
#5 0x000055a230ad8356 in CacheVC::openWriteCloseDir (this=0x7f44e402f2f0)
at CacheWrite.cc:1208
#6 0x000055a230ad89b5 in CacheVC::openWriteCloseHeadDone
(this=0x7f44e402f2f0, event=3900, e=0x0) at CacheWrite.cc:1265
#7 0x000055a2308354ef in Continuation::handleEvent (this=0x7f44e402f2f0,
event=3900, data=0x0) at
/home/maskit/trafficserver/iocore/eventsystem/I_Continuation.h:228
#8 0x000055a230ad2749 in CacheVC::updateVector (this=0x7f44e402f2f0) at
CacheWrite.cc:200
#9 0x000055a230ad8b79 in CacheVC::openWriteCloseHead (this=0x7f44e402f2f0,
event=3900, e=0x0) at CacheWrite.cc:1285
#10 0x000055a230ad8f75 in CacheVC::openWriteCloseDataDone
(this=0x7f44e402f2f0, event=3900, e=0x0) at CacheWrite.cc:1338
#11 0x000055a2308354ef in Continuation::handleEvent (this=0x7f44e402f2f0,
event=3900, data=0x0) at
/home/maskit/trafficserver/iocore/eventsystem/I_Continuation.h:228
#12 0x000055a230adc46f in CacheVC::handleWriteLock (this=0x7f44e402f2f0,
e=0x0) at P_CacheInternal.h:617
#13 0x000055a230adc67b in CacheVC::do_write_lock_call (this=0x7f44e402f2f0)
at P_CacheInternal.h:633
#14 0x000055a230ad91d5 in CacheVC::openWriteClose (this=0x7f44e402f2f0,
event=0, e=0x0) at CacheWrite.cc:1374
#15 0x000055a230aaa33e in CacheVC::die (this=0x7f44e402f2f0) at
P_CacheInternal.h:585
#16 0x000055a230ace185 in CacheVC::calluser (this=0x7f44e402f2f0, event=103)
at P_CacheInternal.h:528
#17 0x000055a230ad9826 in CacheVC::openWriteMain (this=0x7f44e402f2f0) at
CacheWrite.cc:1457
#18 0x000055a2308354ef in Continuation::handleEvent (this=0x7f44e402f2f0,
event=1, data=0x7f44b0000e20) at
/home/maskit/trafficserver/iocore/eventsystem/I_Continuation.h:228
#19 0x000055a230d25677 in EThread::process_event (this=0x7f45001b4010,
e=0x7f44b0000e20, calling_code=1) at UnixEThread.cc:150
#20 0x000055a230d258c7 in EThread::process_queue (this=0x7f45001b4010,
NegativeQueue=0x7f44fb9d4170, ev_count=0x7f44fb9d4124, nq_count=0x7f44fb9d4120)
at UnixEThread.cc:185
#21 0x000055a230d25bd6 in EThread::execute_regular (this=0x7f45001b4010) at
UnixEThread.cc:241
#22 0x000055a230d25ff2 in EThread::execute (this=0x7f45001b4010) at
UnixEThread.cc:334
#23 0x000055a230d248d6 in spawn_thread_internal (a=0x55a2331ec460) at
Thread.cc:78
#24 0x00007f4503ad9609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#25 0x00007f450357a133 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
(gdb) f 4
#4 0x000055a23085a7d3 in ts::Metrics::increment (metric=0x0, val=1) at
../../include/api/Metrics.h:158
158 ink_assert(metric);
(gdb) l
153
154 // Static methods to encapsulate access to the atomic's
155 static void
156 increment(IntType *metric, uint64_t val = 1)
157 {
158 ink_assert(metric);
159 metric->fetch_add(val, MEMORY_ORDER);
160 }
161
162 static void
(gdb) p metric
$1 = (ts::Metrics::IntType *) 0x0
```
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