Susan Hinrichs created TS-3105:
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Summary: Combination of fixes for TS-3084 and TS-3073 causing
asserts and segfaults on 5.1 and beyond
Key: TS-3105
URL: https://issues.apache.org/jira/browse/TS-3105
Project: Traffic Server
Issue Type: Bug
Reporter: Susan Hinrichs
These two patches were run in a production environment on top of 5.0.1 without
problem for several weeks. Now running with these patches on top of 5.1 causes
either an assert or a segfault. Another person has reported the same segfault
when running master in a production environment.
In the assert, the handler_state of the producers is 0 (UNKNOWN) rather than a
terminal state which is expected. I'm assuming either we are being directed
into the terminal state from a connection that terminates too quickly. Or an
event has hung around for too long and is being executed against the state
machine after it has been recycled.
The event is HTTP_TUNNEL_EVENT_DONE
The assert stack trace is
FATAL: HttpSM.cc:2632: failed assert `0`
/z/bin/traffic_server - STACK TRACE:
/z/lib/libtsutil.so.5(+0x25197)[0x2b8bd08dc197]
/z/lib/libtsutil.so.5(+0x23def)[0x2b8bd08dadef]
/z/bin/traffic_server(HttpSM::tunnel_handler_post_or_put(HttpTunnelProducer*)+0xcd)[0x5982ad]
/z/bin/traffic_server(HttpSM::tunnel_handler_post(int, void*)+0x86)[0x5a32d6]
/z/bin/traffic_server(HttpSM::main_handler(int, void*)+0xd8)[0x5a1e18]
/z/bin/traffic_server(HttpTunnel::main_handler(int, void*)+0xee)[0x5dd6ae]
/z/bin/traffic_server(write_to_net_io(NetHandler*, UnixNetVConnection*,
EThread*)+0x136e)[0x721d1e]
/z/bin/traffic_server(NetHandler::mainNetEvent(int, Event*)+0x28c)[0x7162fc]
/z/bin/traffic_server(EThread::process_event(Event*, int)+0x91)[0x744df1]
/z/bin/traffic_server(EThread::execute()+0x4fc)[0x7458ac]
/z/bin/traffic_server[0x7440ca]
/lib64/libpthread.so.0(+0x7034)[0x2b8bd1ee4034]
/lib64/libc.so.6(clone+0x6d)[0x2b8bd2c2875d]
The segfault stack trace is
/z/bin/traffic_server - STACK TRACE:
/lib64/libpthread.so.0(+0xf280)[0x2abccd0d8280]
/z/bin/traffic_server(HttpSM::tunnel_handler_ua(int,
HttpTunnelConsumer*)+0x122)[0x591462]
/z/bin/traffic_server(HttpTunnel::consumer_handler(int,
HttpTunnelConsumer*)+0x9e)[0x5dd15e]
/z/bin/traffic_server(HttpTunnel::main_handler(int, void*)+0x117)[0x5dd6d7]
/z/bin/traffic_server(UnixNetVConnection::mainEvent(int,
Event*)+0x3f0)[0x725190]
/z/bin/traffic_server(InactivityCop::check_inactivity(int,
Event*)+0x275)[0x716b75]
/z/bin/traffic_server(EThread::process_event(Event*, int)+0x91)[0x744df1]
/z/bin/traffic_server(EThread::execute()+0x2fb)[0x7456ab]
/z/bin/traffic_server[0x7440ca]
/lib64/libpthread.so.0(+0x7034)[0x2abccd0d0034]
/lib64/libc.so.6(clone+0x6d)[0x2abccde1475d]
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