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https://issues.apache.org/jira/browse/DISPATCH-945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16406928#comment-16406928
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Chuck Rolke commented on DISPATCH-945:
--------------------------------------
Reproducing this issue results in a hang instead of a crash:
{{(gdb) thread apply all bt}}
{{Thread 1 (Thread 0x7f9e2c1d91c0 (LWP 10896)):}}
{{#0 0x00007f9e2b6edbca in __pthread_mutex_lock_full () from
/lib64/libpthread.so.0}}
{{#1 0x00007f9e2bd99735 in sys_mutex_lock (mutex=0xcd7000) at
/home/chug/git/qpid-dispatch/src/posix/threading.c:56}}
{{#2 0x00007f9e2bd85431 in qd_link_free (link=0x7f9e100494e0) at
/home/chug/git/qpid-dispatch/src/container.c:791}}
{{#3 0x00007f9e2bdba536 in AMQP_link_detach_handler (context=0xce40c0,
link=0x7f9e100494e0, dt=QD_LOST)}}
{{ at /home/chug/git/qpid-dispatch/src/router_node.c:730}}
{{#4 0x00007f9e2bd838f4 in close_links (container=0xb6de00,
conn=0x7f9e100162f0, print_log=true)}}
{{ at /home/chug/git/qpid-dispatch/src/container.c:295}}
{{#5 0x00007f9e2bd83943 in close_handler (container=0xb6de00,
conn=0x7f9e100162f0, qd_conn=0x7f9e1000c9e0)}}
{{ at /home/chug/git/qpid-dispatch/src/container.c:308}}
{{#6 0x00007f9e2bd84489 in qd_container_handle_event (container=0xb6de00,
event=0xcd7010) at /home/chug/git/qpid-dispatch/src/container.c:558}}
{{#7 0x00007f9e2bdc0abf in handle (qd_server=0xcfef70, e=0xcd7010) at
/home/chug/git/qpid-dispatch/src/server.c:940}}
{{#8 0x00007f9e2bdc24ee in qd_connection_handle (c=0x7f9e1000c9e0, e=0xcd7010)
at /home/chug/git/qpid-dispatch/src/server.c:1466}}
{{#9 0x00007f9e2bdc3c65 in handle_events (c=0x7f9e1000d330) at
/home/chug/git/qpid-dispatch/src/http-libwebsockets.c:150}}
{{#10 0x00007f9e2bdc4aef in callback_amqpws (wsi=0x7f9e1000ab70,
reason=LWS_CALLBACK_CLOSED, user=0x7f9e1000d330, in=0x0, len=0)}}
{{ at /home/chug/git/qpid-dispatch/src/http-libwebsockets.c:462}}
{{#11 0x00007f9e2ac78fa1 in lws_close_free_wsi () from
/lib64/libwebsockets.so.11}}
{{#12 0x00007f9e2ac80879 in lws_context_destroy.part () from
/lib64/libwebsockets.so.11}}
{{#13 0x00007f9e2bdc4e58 in qd_http_server_free (hs=0xb7ce80) at
/home/chug/git/qpid-dispatch/src/http-libwebsockets.c:533}}
{{#14 0x00007f9e2bdc161c in qd_server_free (qd_server=0xcfef70) at
/home/chug/git/qpid-dispatch/src/server.c:1176}}
{{#15 0x00007f9e2bd86656 in qd_dispatch_free (qd=0xa24280) at
/home/chug/git/qpid-dispatch/src/dispatch.c:307}}
{{#16 0x00000000004016d4 in main_process (}}
{{ config_path=0x7ffc68bc596f
"/home/chug/Research/qdr/message-copy/gen-test-network/2017-05-16_13-46-48_2/websocket.conf",
}}
{{ python_pkgdir=0x7ffc68bc59cd "/home/chug/git/qpid-dispatch/python", fd=2)
at /home/chug/git/qpid-dispatch/router/src/main.c:115}}
{{#17 0x0000000000401fa8 in main (argc=5, argv=0x7ffc68bc3b08) at
/home/chug/git/qpid-dispatch/router/src/main.c:318}}
> Crash on shutdown when a http+websocket connection is open
> ----------------------------------------------------------
>
> Key: DISPATCH-945
> URL: https://issues.apache.org/jira/browse/DISPATCH-945
> Project: Qpid Dispatch
> Issue Type: Bug
> Components: Container
> Affects Versions: 1.0.1
> Reporter: Ted Ross
> Assignee: Chuck Rolke
> Priority: Major
> Fix For: 1.1.0
>
>
> If the router is shut down when there is an active HTTP+websockets
> connection, the router segfaults.
> This crash appears to be a result of improper shutdown ordering. When the
> connection is closed, the container module has already been freed. This
> results in the dereferencing of invalid pointers.
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