Github user yatsukhnenko commented on the pull request:
https://github.com/apache/trafficserver/pull/644#issuecomment-221572657
I need some help for fixing unexpected Segmentation fault.
```
NOTE: Traffic Server received Sig 11: Segmentation fault
/opt/trafficserver-4.2.3/bin/traffic_server - STACK TRACE:
/lib64/libpthread.so.0(+0x318aa0f710)[0x2b804a60f710]
/opt/trafficserver-4.2.3/bin/traffic_server(_ZN6HttpSM17tunnel_handler_uaEiP18HttpTunnelConsumer+0x32e)[0x51bd0e]
/opt/trafficserver-4.2.3/bin/traffic_server(_ZN10HttpTunnel16consumer_handlerEiP18HttpTunnelConsumer+0x9e)[0x56c16e]
/opt/trafficserver-4.2.3/bin/traffic_server(_ZN10HttpTunnel12main_handlerEiPv+0x10d)[0x56d16d]
/opt/trafficserver-4.2.3/bin/traffic_server[0x687961]
/opt/trafficserver-4.2.3/bin/traffic_server(_Z15write_to_net_ioP10NetHandlerP18UnixNetVConnectionP7EThread+0x8b5)[0x68acf5]
/opt/trafficserver-4.2.3/bin/traffic_server(_ZN10NetHandler12mainNetEventEiP5Event+0x283)[0x67ed43]
/opt/trafficserver-4.2.3/bin/traffic_server(_ZN7EThread13process_eventEP5Eventi+0x8f)[0x6ab4cf]
/opt/trafficserver-4.2.3/bin/traffic_server(_ZN7EThread7executeEv+0x44b)[0x6abd0b]
/opt/trafficserver-4.2.3/bin/traffic_server[0x6aa85a]
/lib64/libpthread.so.0(+0x318aa079d1)[0x2b804a6079d1]
/lib64/libc.so.6(clone+0x6d)[0x318a6e88fd]
```
```
#0 get_netvc (this=0x2b8078a00000, event=104, c=0x2b8078a01ca8) at
HttpServerSession.h:113
#1 HttpSM::tunnel_handler_ua (this=0x2b8078a00000, event=104,
c=0x2b8078a01ca8) at HttpSM.cc:3067
#2 0x000000000056c16e in HttpTunnel::consumer_handler
(this=0x2b8078a01c00, event=104, c=0x2b8078a01ca8) at HttpTunnel.cc:1261
#3 0x000000000056d16d in HttpTunnel::main_handler (this=0x2b8078a01c00,
event=<value optimized out>, data=<value optimized out>) at HttpTunnel.cc:1492
#4 0x0000000000687961 in handleEvent (event=<value optimized out>,
nh=0x2b804c50ac00, vc=0x2b805a415a80) at
../../iocore/eventsystem/I_Continuation.h:146
#5 write_signal_and_update (event=<value optimized out>,
nh=0x2b804c50ac00, vc=0x2b805a415a80) at UnixNetVConnection.cc:153
#6 write_signal_done (event=<value optimized out>, nh=0x2b804c50ac00,
vc=0x2b805a415a80) at UnixNetVConnection.cc:180
#7 0x000000000068acf5 in write_to_net_io (nh=0x2b804c50ac00,
vc=0x2b805a415a80, thread=0x2b804c507000) at UnixNetVConnection.cc:472
#8 0x000000000067ed43 in NetHandler::mainNetEvent (this=0x2b804c50ac00,
event=<value optimized out>, e=<value optimized out>) at UnixNet.cc:400
#9 0x00000000006ab4cf in handleEvent (this=0x2b804c507000,
e=0x2b804e616cc0, calling_code=5) at I_Continuation.h:146
#10 EThread::process_event (this=0x2b804c507000, e=0x2b804e616cc0,
calling_code=5) at UnixEThread.cc:145
#11 0x00000000006abd0b in EThread::execute (this=0x2b804c507000) at
UnixEThread.cc:269
#12 0x00000000006aa85a in spawn_thread_internal (a=0x2b804b6854f0) at
Thread.cc:88
#13 0x00002b804a6079d1 in start_thread () from /lib64/libpthread.so.0
#14 0x000000318a6e88fd in clone () from /lib64/libc.so.6
```
@zwoop, would you have a time to look closer at this PR?
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