Assert failure on HttpTransact::HandleResponse

[masaori335]

We faced an assertion failure on the 9.2.0 testing box.

[ 00 ] libpthread-2.17.so      waitpid                                                                                                                             
[ 01 ] traffic_server          crash_logger_invoke(int, siginfo_t*, void*)                                                                                         ( Crash.cc:168 )
[ 02 ] libpthread-2.17.so                                                                                                                                          
[ 03 ] libc-2.17.so            gsignal                                                                                                                             
[ 04 ] libc-2.17.so            abort                                                                                                                               
[ 05 ] libtscore.so.9.2.0      ink_abort(char const*, ...)                                                                                                         ( ink_error.cc:99 )
[ 06 ] libtscore.so.9.2.0      _ink_assert                                                                                                                         ( ink_assert.cc:37 )
[ 07 ] traffic_server          HttpTransact::HandleResponse(HttpTransact::State*)                                                                                  ( HttpTransact.cc:3488 )
[ 08 ] traffic_server          HttpSM::call_transact_and_set_next_state(void (*)(HttpTransact::State*))                                                            ( HttpSM.cc )
[ 09 ] traffic_server          HttpSM::do_http_server_open(bool)                                                                                                   ( HttpSM.cc )
[ 10 ] traffic_server          HttpSM::set_next_state()                                                                                                            ( HttpSM.cc )
[ 11 ] traffic_server          HttpSM::state_cache_open_write(int, void*)                                                                                          ( HttpSM.cc:2658 )
[ 12 ] traffic_server          HttpSM::main_handler(int, void*)                                                                                                    ( HttpSM.cc )                                                                                                             
...

The assert is

trafficserver/proxy/http/HttpTransact.cc

Line 3488 in 3c583fe

ink_release_assert(s->cache_info.action != CACHE_DO_SERVE);

A warning was logged right before the crash.

[ET_NET 29] WARNING: [94396183] too many connections: count=* limit=* group=* blocked=1 queued=0 upstream=*