bneradt opened a new issue, #11114:
URL: https://github.com/apache/trafficserver/issues/11114
Docs is running HTTP/3. We see this crash with some regularity on the box
(maybe once an hour or so):
```gdb
(gdb) bt
#0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#1 0x00007ffff66ba859 in __GI_abort () at abort.c:79
#2 0x000055555611e6e2 in ink_abort (message_format=0x555556b74840 "%s:%d:
failed assertion `%s`") at
/home/bneradt/src/trafficserver_10/src/tscore/ink_error.cc:99
#3 0x0000555556118556 in _ink_assert (expression=0x555556be3e60
"default_handler != (HttpSMHandler) nullptr", file=0x555556bdff80
"/home/bneradt/src/trafficserver_10/src/proxy/http/HttpSM.cc", line=2620) at
/home/bneradt/src/trafficserver_10/src/tscore/ink_assert.cc:35
#4 0x0000555556208317 in HttpSM::main_handler (this=0x626000057100,
event=105, data=0x0) at
/home/bneradt/src/trafficserver_10/src/proxy/http/HttpSM.cc:2620
#5 0x00005555560b6417 in Continuation::handleEvent (this=0x626000057100,
event=105, data=0x0) at
/home/bneradt/src/trafficserver_10/include/iocore/eventsystem/Continuation.h:228
#6 0x0000555556aa2d35 in HQTransaction::_signal_event (this=0x62600004b100,
event=105) at
/home/bneradt/src/trafficserver_10/src/proxy/http3/Http3Transaction.cc:353
#7 0x0000555556aa5e16 in Http3Transaction::state_stream_open
(this=0x62600004b100, event=105, edata=0x0) at
/home/bneradt/src/trafficserver_10/src/proxy/http3/Http3Transaction.cc:506
#8 0x00005555560b6417 in Continuation::handleEvent (this=0x62600004b100,
event=105, data=0x0) at
/home/bneradt/src/trafficserver_10/include/iocore/eventsystem/Continuation.h:228
#9 0x0000555556a9cdc7 in HQSession::main_event_handler
(this=0x619000143c80, event=105, edata=0x61b00002a2e0) at
/home/bneradt/src/trafficserver_10/src/proxy/http3/Http3Session.cc:167
#10 0x00005555560b6417 in Continuation::handleEvent (this=0x619000143c80,
event=105, data=0x61b00002a2e0) at
/home/bneradt/src/trafficserver_10/include/iocore/eventsystem/Continuation.h:228
#11 0x000055555692cfbf in QUICNetVConnection::_propagate_event
(this=0x61b00002a080, event=105) at
/home/bneradt/src/trafficserver_10/src/iocore/net/QUICNetVConnection.cc:264
#12 0x000055555692c25d in QUICNetVConnection::state_established
(this=0x61b00002a080, event=105, data=0x60900014eb20) at
/home/bneradt/src/trafficserver_10/src/iocore/net/QUICNetVConnection.cc:211
#13 0x00005555560b6417 in Continuation::handleEvent (this=0x61b00002a080,
event=105, data=0x60900014eb20) at
/home/bneradt/src/trafficserver_10/include/iocore/eventsystem/Continuation.h:228
#14 0x0000555556a28851 in EThread::process_event (this=0x7ffff031b800,
e=0x60900014eb20, calling_code=105) at
/home/bneradt/src/trafficserver_10/src/iocore/eventsystem/UnixEThread.cc:163
#15 0x0000555556a28da5 in EThread::process_queue (this=0x7ffff031b800,
NegativeQueue=0x7fffefbbd090, ev_count=0x7fffefbbd000, nq_count=0x7fffefbbcff0)
at /home/bneradt/src/trafficserver_10/src/iocore/eventsystem/UnixEThread.cc:198
#16 0x0000555556a29559 in EThread::execute_regular (this=0x7ffff031b800) at
/home/bneradt/src/trafficserver_10/src/iocore/eventsystem/UnixEThread.cc:277
#17 0x0000555556a29dcb in EThread::execute (this=0x7ffff031b800) at
/home/bneradt/src/trafficserver_10/src/iocore/eventsystem/UnixEThread.cc:350
#18 0x0000555556a26bfe in spawn_thread_internal (a=0x60600002ba60) at
/home/bneradt/src/trafficserver_10/src/iocore/eventsystem/Thread.cc:68
#19 0x00007ffff6894609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#20 0x00007ffff67b7133 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
(gdb) f 4
#4 0x0000555556208317 in HttpSM::main_handler (this=0x626000057100,
event=105, data=0x0) at
/home/bneradt/src/trafficserver_10/src/proxy/http/HttpSM.cc:2620
2620 ink_assert(default_handler != (HttpSMHandler) nullptr);
(gdb) l
2615 jump_point = (static_cast<VIO *>(data) == vc_entry->read_vio) ?
vc_entry->vc_read_handler : vc_entry->vc_write_handler;
2616 ink_assert(jump_point != (HttpSMHandler) nullptr);
2617 ink_assert(vc_entry->vc != (VConnection *)nullptr);
2618 (this->*jump_point)(event, data);
2619 } else {
2620 ink_assert(default_handler != (HttpSMHandler) nullptr);
2621 (this->*default_handler)(event, data);
2622 }
2623
2624 // The sub-handler signals when it is time for the state
(gdb) up
#5 0x00005555560b6417 in Continuation::handleEvent (this=0x626000057100,
event=105, data=0x0) at
/home/bneradt/src/trafficserver_10/include/iocore/eventsystem/Continuation.h:228
228 return (this->*handler)(event, data);
(gdb) up
#6 0x0000555556aa2d35 in HQTransaction::_signal_event (this=0x62600004b100,
event=105) at
/home/bneradt/src/trafficserver_10/src/proxy/http3/Http3Transaction.cc:353
353 this->_write_vio.cont->handleEvent(event);
(gdb) l
348 void
349 HQTransaction::_signal_event(int event)
350 {
351 if (this->_write_vio.cont) {
352 SCOPED_MUTEX_LOCK(lock, this->_write_vio.mutex, this_ethread());
353 this->_write_vio.cont->handleEvent(event);
354 }
355 if (this->_read_vio.cont && this->_read_vio.cont !=
this->_write_vio.cont) {
356 SCOPED_MUTEX_LOCK(lock, this->_read_vio.mutex, this_ethread());
357 this->_read_vio.cont->handleEvent(event);
(gdb) p *this
$3 = {
<ProxyTransaction> = {
<VConnection> = {
<Continuation> = {
<force_VFPT_to_top> = {
_vptr.force_VFPT_to_top = 0x5555572dc358 <vtable for
Http3Transaction+16>
},
members of Continuation:
handler = &virtual table offset 408,
handler_name = 0x55555703e940 "&Http3Transaction::state_stream_open",
mutex = {
m_ptr = 0x60c0000af6c0
},
link = {
<SLink<Continuation>> = {
next = 0x0
},
members of Link<Continuation>:
prev = 0x0
},
control_flags = {
raw_flags = 0
},
thread_affinity = 0x0
},
members of VConnection:
lerrno = 0
},
members of ProxyTransaction:
upstream_outbound_options = {
transport_type = 0,
outbound = {
_ip4 = std::optional<swoc::_1_5_9::IP4Addr> [no contained value],
_ip6 = std::optional<swoc::_1_5_9::IP6Addr> [no contained value]
},
outbound_port = 0,
f_outbound_transparent = false,
f_transparent_passthrough = false,
host_res_preference = {
_M_elems = {HOST_RES_PREFER_IPV4, HOST_RES_PREFER_IPV6,
HOST_RES_PREFER_NONE}
},
session_protocol_preference = {
m_bits = 0
}
},
_proxy_ssn = 0x619000143c80,
_sm = 0x626000057100,
_reader = 0x62600004b1c8
},
members of HQTransaction:
_thread = 0x7ffff031b800,
_read_vio_buf = {
size_index = 5,
water_mark = 0,
_writer = {
m_ptr = 0x0
},
readers = {{
accessor = 0x0,
mbuf = 0x62600004b1b0,
block = {
m_ptr = 0x0
},
start_offset = 0,
size_limit = 9223372036854775807
}, {
accessor = 0x0,
mbuf = 0x0,
block = {
m_ptr = 0x0
},
start_offset = 0,
size_limit = 9223372036854775807
}, {
accessor = 0x0,
mbuf = 0x0,
block = {
m_ptr = 0x0
},
start_offset = 0,
size_limit = 9223372036854775807
}, {
accessor = 0x0,
mbuf = 0x0,
block = {
m_ptr = 0x0
},
start_offset = 0,
size_limit = 9223372036854775807
}, {
accessor = 0x0,
mbuf = 0x0,
block = {
m_ptr = 0x0
},
start_offset = 0,
size_limit = 9223372036854775807
}},
_location = 0x0
},
_info = @0x613000076250,
_sent_bytes = 0,
_read_vio = {
cont = 0x626000057100,
nbytes = 9223372036854775807,
ndone = 0,
op = 1,
_disabled = false,
buffer = {
name = 0x0,
mbuf = 0x62600004b1b0,
entry = 0x0
},
vc_server = 0x62600004b100,
mutex = {
m_ptr = 0x60c0000af6c0
}
},
_write_vio = {
cont = 0x626000057100,
nbytes = 0,
ndone = 0,
op = 2,
_disabled = false,
buffer = {
name = 0x0,
mbuf = 0x0,
entry = 0x0
},
vc_server = 0x62600004b100,
mutex = {
m_ptr = 0x60c0000af6c0
}
},
_read_ready_event = 0x0,
_read_complete_event = 0x0,
_write_ready_event = 0x0,
_write_complete_event = 0x0,
_transaction_done = false
}
```
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