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Posted to dev@qpid.apache.org by "Jiri Daněk (Jira)" <ji...@apache.org> on 2019/11/07 10:17:00 UTC

[jira] [Commented] (PROTON-2133) c-fdlimit-tests with epoll is not tsan clean

    [ https://issues.apache.org/jira/browse/PROTON-2133?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16969126#comment-16969126 ] 

Jiri Daněk commented on PROTON-2133:
------------------------------------

There is largely overlapping list of races from cpp-example-container test. I won't log a separate jira for that. It seems it's about proactor shutdown.

{noformat}
23: test_simple_send_recv (__main__.ContainerExampleTest) ... ok
23: 
23: ----------------------------------------------------------------------
23: Ran 13 tests in 6.825s
23: 
23: OK
23: Traceback (most recent call last):
23:   File "testme", line 218, in <module>
23:     unittest.main()
23:   File "/home/jdanek/repos/qpid/qpid-proton/tests/py/test_subprocess.py", line 110, in __exit__
23:     self.on_exit()
23:   File "/home/jdanek/repos/qpid/qpid-proton/tests/py/test_subprocess.py", line 84, in check_kill
23:     raise TestProcessError(self, "check_kill found error output")
23: test_subprocess.TestProcessError: ['broker', '-a', '//:0'] pid=7888 exit=-9: check_kill found error output
23: ________________________________ stderr(7888) ________________________________
23: ==================
23: WARNING: ThreadSanitizer: data race (pid=7888)
23:   Write of size 4 at 0x7b7000000018 by thread T3:
23:     #0 stop_polling /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:313:10 (libqpid-proton-proactor.so.1+0xd22a)
23:     #1 pconnection_cleanup /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:896:3 (libqpid-proton-proactor.so.1+0xcacb)
23:     #2 pconnection_process /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c (libqpid-proton-proactor.so.1+0xca31)
23:     #3 proactor_do_epoll /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c (libqpid-proton-proactor.so.1+0x98bb)
23:     #4 pn_proactor_wait /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2156:10 (libqpid-proton-proactor.so.1+0x95fe)
23:     #5 proton::container::impl::thread() /home/jdanek/repos/qpid/qpid-proton/cpp/src/proactor_container_impl.cpp:753:36 (libqpid-proton-cpp.so.12+0x447e9)
23:     #6 decltype(*(std::__1::forward<proton::container::impl*>(fp0)).*fp()) std::__1::__invoke<void (proton::container::impl::*)(), proton::container::impl*, void>(void (proton::container::impl::*&&)(), proton::container::impl*&&) /nix/store/5xfzimb492230y3msn1s5q26dx644dpp-libc++-9.0.0/include/c++/v1/type_traits:3471:1 (libqpid-proton-cpp.so.12+0x495eb)
23:     #7 void std::__1::__thread_execute<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, void (proton::container::impl::*)(), proton::container::impl*, 2ul>(std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, void (proton::container::impl::*)(), proton::container::impl*>&, std::__1::__tuple_indices<2ul>) /nix/store/5xfzimb492230y3msn1s5q26dx644dpp-libc++-9.0.0/include/c++/v1/thread:277:5 (libqpid-proton-cpp.so.12+0x495eb)
23:     #8 void* std::__1::__thread_proxy<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, void (proton::container::impl::*)(), proton::container::impl*> >(void*) /nix/store/5xfzimb492230y3msn1s5q26dx644dpp-libc++-9.0.0/include/c++/v1/thread:287:5 (libqpid-proton-cpp.so.12+0x495eb)
23: 
23:   Previous read of size 4 at 0x7b7000000018 by main thread (mutexes: write M55304816401843944):
23:     #0 rearm /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:720:48 (libqpid-proton-proactor.so.1+0x8703)
23:     #1 pconnection_rearm /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1014:5 (libqpid-proton-proactor.so.1+0xcf78)
23:     #2 pconnection_done /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1051:14 (libqpid-proton-proactor.so.1+0x9e24)
23:     #3 pn_proactor_done /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2166:5 (libqpid-proton-proactor.so.1+0x9e24)
23:     #4 proton::container::impl::thread() /home/jdanek/repos/qpid/qpid-proton/cpp/src/proactor_container_impl.cpp:768:9 (libqpid-proton-cpp.so.12+0x44845)
23:     #5 proton::container::impl::run(int) /home/jdanek/repos/qpid/qpid-proton/cpp/src/proactor_container_impl.cpp:805:5 (libqpid-proton-cpp.so.12+0x45204)
23:     #6 proton::container::run(int) /home/jdanek/repos/qpid/qpid-proton/cpp/src/container.cpp:95:43 (libqpid-proton-cpp.so.12+0x3f9b8)
23:     #7 broker::run() /home/jdanek/repos/qpid/qpid-proton/cpp/examples/broker.cpp:386:20 (broker+0x4dc1f5)
23:     #8 main /home/jdanek/repos/qpid/qpid-proton/cpp/examples/broker.cpp:427:25 (broker+0x4dc1f5)
23: 
23:   Location is heap block of size 1880 at 0x7b7000000000 allocated by main thread:
23:     #0 calloc <null> (broker+0x469204)
23:     #1 pn_listener_accept2 /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1795:40 (libqpid-proton-proactor.so.1+0x7d91)
23:     #2 proton::container::impl::dispatch(pn_event_t*) /home/jdanek/repos/qpid/qpid-proton/cpp/src/proactor_container_impl.cpp:630:9 (libqpid-proton-cpp.so.12+0x441cb)
23:     #3 proton::container::impl::thread() /home/jdanek/repos/qpid/qpid-proton/cpp/src/proactor_container_impl.cpp:758:37 (libqpid-proton-cpp.so.12+0x44827)
23:     #4 proton::container::impl::run(int) /home/jdanek/repos/qpid/qpid-proton/cpp/src/proactor_container_impl.cpp:805:5 (libqpid-proton-cpp.so.12+0x45204)
23:     #5 proton::container::run(int) /home/jdanek/repos/qpid/qpid-proton/cpp/src/container.cpp:95:43 (libqpid-proton-cpp.so.12+0x3f9b8)
23:     #6 broker::run() /home/jdanek/repos/qpid/qpid-proton/cpp/examples/broker.cpp:386:20 (broker+0x4dc1f5)
23:     #7 main /home/jdanek/repos/qpid/qpid-proton/cpp/examples/broker.cpp:427:25 (broker+0x4dc1f5)
23: 
23:   Mutex M55304816401843944 is already destroyed.
23: 
23:   Thread T3 (tid=7892, running) created by main thread at:
23:     #0 pthread_create <null> (broker+0x43c682)
23:     #1 std::__1::__libcpp_thread_create(unsigned long*, void* (*)(void*), void*) /nix/store/5xfzimb492230y3msn1s5q26dx644dpp-libc++-9.0.0/include/c++/v1/__threading_support:336:10 (libqpid-proton-cpp.so.12+0x45e11)
23:     #2 std::__1::thread::thread<void (proton::container::impl::*)(), proton::container::impl*, void>(void (proton::container::impl::*&&)(), proton::container::impl*&&) /nix/store/5xfzimb492230y3msn1s5q26dx644dpp-libc++-9.0.0/include/c++/v1/thread:303:16 (libqpid-proton-cpp.so.12+0x45e11)
23:     #3 proton::container::impl::run(int) /home/jdanek/repos/qpid/qpid-proton/cpp/src/proactor_container_impl.cpp:802:18 (libqpid-proton-cpp.so.12+0x451d9)
23:     #4 proton::container::run(int) /home/jdanek/repos/qpid/qpid-proton/cpp/src/container.cpp:95:43 (libqpid-proton-cpp.so.12+0x3f9b8)
23:     #5 broker::run() /home/jdanek/repos/qpid/qpid-proton/cpp/examples/broker.cpp:386:20 (broker+0x4dc1f5)
23:     #6 main /home/jdanek/repos/qpid/qpid-proton/cpp/examples/broker.cpp:427:25 (broker+0x4dc1f5)
23: 
23: SUMMARY: ThreadSanitizer: data race /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:313:10 in stop_polling
23: ==================
23: ==================
23: WARNING: ThreadSanitizer: data race (pid=7888)
23:   Write of size 8 at 0x7ba0000000b0 by thread T3:
23:     #0 close <null> (broker+0x455643)
23:     #1 pclosefd /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:805:13 (libqpid-proton-proactor.so.1+0xcaf4)
23:     #2 pconnection_cleanup /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:898:5 (libqpid-proton-proactor.so.1+0xcaf4)
23:     #3 pconnection_process /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c (libqpid-proton-proactor.so.1+0xca31)
23:     #4 proactor_do_epoll /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c (libqpid-proton-proactor.so.1+0x98bb)
23:     #5 pn_proactor_wait /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2156:10 (libqpid-proton-proactor.so.1+0x95fe)
23:     #6 proton::container::impl::thread() /home/jdanek/repos/qpid/qpid-proton/cpp/src/proactor_container_impl.cpp:753:36 (libqpid-proton-cpp.so.12+0x447e9)
23:     #7 decltype(*(std::__1::forward<proton::container::impl*>(fp0)).*fp()) std::__1::__invoke<void (proton::container::impl::*)(), proton::container::impl*, void>(void (proton::container::impl::*&&)(), proton::container::impl*&&) /nix/store/5xfzimb492230y3msn1s5q26dx644dpp-libc++-9.0.0/include/c++/v1/type_traits:3471:1 (libqpid-proton-cpp.so.12+0x495eb)
23:     #8 void std::__1::__thread_execute<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, void (proton::container::impl::*)(), proton::container::impl*, 2ul>(std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, void (proton::container::impl::*)(), proton::container::impl*>&, std::__1::__tuple_indices<2ul>) /nix/store/5xfzimb492230y3msn1s5q26dx644dpp-libc++-9.0.0/include/c++/v1/thread:277:5 (libqpid-proton-cpp.so.12+0x495eb)
23:     #9 void* std::__1::__thread_proxy<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, void (proton::container::impl::*)(), proton::container::impl*> >(void*) /nix/store/5xfzimb492230y3msn1s5q26dx644dpp-libc++-9.0.0/include/c++/v1/thread:287:5 (libqpid-proton-cpp.so.12+0x495eb)
23: 
23:   Previous read of size 8 at 0x7ba0000000b0 by main thread (mutexes: write M55304816401843944):
23:     #0 epoll_ctl <null> (broker+0x43d288)
23:     #1 rearm /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:720:7 (libqpid-proton-proactor.so.1+0x871a)
23:     #2 pconnection_rearm /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1014:5 (libqpid-proton-proactor.so.1+0xcf78)
23:     #3 pconnection_done /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1051:14 (libqpid-proton-proactor.so.1+0x9e24)
23:     #4 pn_proactor_done /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2166:5 (libqpid-proton-proactor.so.1+0x9e24)
23:     #5 proton::container::impl::thread() /home/jdanek/repos/qpid/qpid-proton/cpp/src/proactor_container_impl.cpp:768:9 (libqpid-proton-cpp.so.12+0x44845)
23:     #6 proton::container::impl::run(int) /home/jdanek/repos/qpid/qpid-proton/cpp/src/proactor_container_impl.cpp:805:5 (libqpid-proton-cpp.so.12+0x45204)
23:     #7 proton::container::run(int) /home/jdanek/repos/qpid/qpid-proton/cpp/src/container.cpp:95:43 (libqpid-proton-cpp.so.12+0x3f9b8)
23:     #8 broker::run() /home/jdanek/repos/qpid/qpid-proton/cpp/examples/broker.cpp:386:20 (broker+0x4dc1f5)
23:     #9 main /home/jdanek/repos/qpid/qpid-proton/cpp/examples/broker.cpp:427:25 (broker+0x4dc1f5)
23: 
23:   Location is file descriptor 11 created by main thread at:
23:     #0 accept <null> (broker+0x443455)
23:     #1 listener_accept_lh /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1682:27 (libqpid-proton-proactor.so.1+0xdd1c)
23:     #2 listener_process /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1718:9 (libqpid-proton-proactor.so.1+0xdd1c)
23:     #3 proactor_do_epoll /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2146:17 (libqpid-proton-proactor.so.1+0x99ad)
23:     #4 pn_proactor_wait /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2156:10 (libqpid-proton-proactor.so.1+0x95fe)
23:     #5 proton::container::impl::thread() /home/jdanek/repos/qpid/qpid-proton/cpp/src/proactor_container_impl.cpp:753:36 (libqpid-proton-cpp.so.12+0x447e9)
23:     #6 proton::container::impl::run(int) /home/jdanek/repos/qpid/qpid-proton/cpp/src/proactor_container_impl.cpp:805:5 (libqpid-proton-cpp.so.12+0x45204)
23:     #7 proton::container::run(int) /home/jdanek/repos/qpid/qpid-proton/cpp/src/container.cpp:95:43 (libqpid-proton-cpp.so.12+0x3f9b8)
23:     #8 broker::run() /home/jdanek/repos/qpid/qpid-proton/cpp/examples/broker.cpp:386:20 (broker+0x4dc1f5)
23:     #9 main /home/jdanek/repos/qpid/qpid-proton/cpp/examples/broker.cpp:427:25 (broker+0x4dc1f5)
23: 
23:   Mutex M55304816401843944 is already destroyed.
23: 
23:   Thread T3 (tid=7892, running) created by main thread at:
23:     #0 pthread_create <null> (broker+0x43c682)
23:     #1 std::__1::__libcpp_thread_create(unsigned long*, void* (*)(void*), void*) /nix/store/5xfzimb492230y3msn1s5q26dx644dpp-libc++-9.0.0/include/c++/v1/__threading_support:336:10 (libqpid-proton-cpp.so.12+0x45e11)
23:     #2 std::__1::thread::thread<void (proton::container::impl::*)(), proton::container::impl*, void>(void (proton::container::impl::*&&)(), proton::container::impl*&&) /nix/store/5xfzimb492230y3msn1s5q26dx644dpp-libc++-9.0.0/include/c++/v1/thread:303:16 (libqpid-proton-cpp.so.12+0x45e11)
23:     #3 proton::container::impl::run(int) /home/jdanek/repos/qpid/qpid-proton/cpp/src/proactor_container_impl.cpp:802:18 (libqpid-proton-cpp.so.12+0x451d9)
23:     #4 proton::container::run(int) /home/jdanek/repos/qpid/qpid-proton/cpp/src/container.cpp:95:43 (libqpid-proton-cpp.so.12+0x3f9b8)
23:     #5 broker::run() /home/jdanek/repos/qpid/qpid-proton/cpp/examples/broker.cpp:386:20 (broker+0x4dc1f5)
23:     #6 main /home/jdanek/repos/qpid/qpid-proton/cpp/examples/broker.cpp:427:25 (broker+0x4dc1f5)
23: 
23: SUMMARY: ThreadSanitizer: data race (/home/jdanek/repos/qpid/qpid-proton/cmake-build-debug-gcc/cpp/examples/broker+0x455643) in close
23: ==================
23: ________________________________ stderr(7888) ________________________________
23: 
23/24 Test #23: cpp-example-container ............***Failed    7.03 sec
{noformat}

> c-fdlimit-tests with epoll is not tsan clean
> --------------------------------------------
>
>                 Key: PROTON-2133
>                 URL: https://issues.apache.org/jira/browse/PROTON-2133
>             Project: Qpid Proton
>          Issue Type: Bug
>          Components: proton-c
>    Affects Versions: proton-c-0.29.0
>            Reporter: Jiri Daněk
>            Priority: Major
>
> {noformat}
> 6: Test timeout computed to be: 1500
> 6: E
> 6: ======================================================================
> 6: ERROR: test_fd_limit_broker (__main__.FdLimitTest)
> 6: Check behaviour when running out of file descriptors on accept
> 6: ----------------------------------------------------------------------
> 6: Traceback (most recent call last):
> 6:   File "/home/jdanek/repos/qpid/qpid-proton/c/tests/fdlimit.py", line 87, in test_fd_limit_broker
> 6:     self.assertIn("10 messages received", test_subprocess.check_output(["receive", "", b.port], universal_newlines=True))
> 6:   File "/home/jdanek/repos/qpid/qpid-proton/tests/py/test_subprocess.py", line 110, in __exit__
> 6:     self.on_exit()
> 6:   File "/home/jdanek/repos/qpid/qpid-proton/tests/py/test_subprocess.py", line 84, in check_kill
> 6:     raise TestProcessError(self, "check_kill found error output")
> 6: TestProcessError: ['prlimit', '-n256', 'broker', '', '0'] pid=7358 exit=-9: check_kill found error output
> 6: ________________________________ stderr(7358) ________________________________
> 6: ==================
> 6: WARNING: ThreadSanitizer: data race (pid=7358)
> 6:   Write of size 4 at 0x7b7000029818 by thread T3:
> 6:     #0 stop_polling /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:313:10 (libqpid-proton-proactor.so.1+0xd22a)
> 6:     #1 pconnection_cleanup /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:896:3 (libqpid-proton-proactor.so.1+0xcacb)
> 6:     #2 pconnection_done /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1044:7 (libqpid-proton-proactor.so.1+0xa670)
> 6:     #3 pn_proactor_done /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2166:5 (libqpid-proton-proactor.so.1+0xa670)
> 6:     #4 broker_thread /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:439:5 (broker+0x4cb4e6)
> 6: 
> 6:   Previous read of size 4 at 0x7b7000029818 by thread T2 (mutexes: write M2131):
> 6:     #0 rearm /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:720:48 (libqpid-proton-proactor.so.1+0x8703)
> 6:     #1 pconnection_rearm /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1014:5 (libqpid-proton-proactor.so.1+0xcf78)
> 6:     #2 pconnection_done /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1051:14 (libqpid-proton-proactor.so.1+0x9e24)
> 6:     #3 pn_proactor_done /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2166:5 (libqpid-proton-proactor.so.1+0x9e24)
> 6:     #4 broker_thread /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:439:5 (broker+0x4cb4e6)
> 6: 
> 6:   Location is heap block of size 1880 at 0x7b7000029800 allocated by thread T2:
> 6:     #0 calloc <null> (broker+0x45b124)
> 6:     #1 pn_listener_accept2 /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1795:40 (libqpid-proton-proactor.so.1+0x7d91)
> 6:     #2 handle /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:306:6 (broker+0x4cb794)
> 6:     #3 broker_thread /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:437:14 (broker+0x4cb794)
> 6: 
> 6:   Mutex M2131 (0x7b7000029ee8) created at:
> 6:     #0 pthread_mutex_init <null> (broker+0x42e922)
> 6:     #1 pmutex_init /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:105:7 (libqpid-proton-proactor.so.1+0x560a)
> 6:     #2 pconnection_setup /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:853:3 (libqpid-proton-proactor.so.1+0x560a)
> 6:     #3 pn_listener_accept2 /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1797:21 (libqpid-proton-proactor.so.1+0x7dd8)
> 6:     #4 handle /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:306:6 (broker+0x4cb794)
> 6:     #5 broker_thread /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:437:14 (broker+0x4cb794)
> 6: 
> 6:   Thread T3 (tid=7362, running) created by main thread at:
> 6:     #0 pthread_create <null> (broker+0x42e5a2)
> 6:     #1 main /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:471:5 (broker+0x4cb3af)
> 6: 
> 6:   Thread T2 (tid=7361, running) created by main thread at:
> 6:     #0 pthread_create <null> (broker+0x42e5a2)
> 6:     #1 main /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:471:5 (broker+0x4cb3af)
> 6: 
> 6: SUMMARY: ThreadSanitizer: data race /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:313:10 in stop_polling
> 6: ==================
> 6: ==================
> 6: WARNING: ThreadSanitizer: data race (pid=7358)
> 6:   Write of size 8 at 0x7ba0000000e0 by thread T3:
> 6:     #0 close <null> (broker+0x447563)
> 6:     #1 pclosefd /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:805:13 (libqpid-proton-proactor.so.1+0xcaf4)
> 6:     #2 pconnection_cleanup /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:898:5 (libqpid-proton-proactor.so.1+0xcaf4)
> 6:     #3 pconnection_done /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1044:7 (libqpid-proton-proactor.so.1+0xa670)
> 6:     #4 pn_proactor_done /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2166:5 (libqpid-proton-proactor.so.1+0xa670)
> 6:     #5 broker_thread /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:439:5 (broker+0x4cb4e6)
> 6: 
> 6:   Previous read of size 8 at 0x7ba0000000e0 by thread T2:
> 6:     [failed to restore the stack]
> 6: 
> 6:   Location is file descriptor 14 created by thread T2 at:
> 6:     #0 accept <null> (broker+0x435375)
> 6:     #1 listener_accept_lh /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1682:27 (libqpid-proton-proactor.so.1+0xdd1c)
> 6:     #2 listener_process /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1718:9 (libqpid-proton-proactor.so.1+0xdd1c)
> 6:     #3 proactor_do_epoll /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2146:17 (libqpid-proton-proactor.so.1+0x99ad)
> 6:     #4 pn_proactor_wait /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2156:10 (libqpid-proton-proactor.so.1+0x95fe)
> 6:     #5 broker_thread /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:434:32 (broker+0x4cb503)
> 6: 
> 6:   Thread T3 (tid=7362, running) created by main thread at:
> 6:     #0 pthread_create <null> (broker+0x42e5a2)
> 6:     #1 main /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:471:5 (broker+0x4cb3af)
> 6: 
> 6:   Thread T2 (tid=7361, running) created by main thread at:
> 6:     #0 pthread_create <null> (broker+0x42e5a2)
> 6:     #1 main /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:471:5 (broker+0x4cb3af)
> 6: 
> 6: SUMMARY: ThreadSanitizer: data race (/home/jdanek/repos/qpid/qpid-proton/cmake-build-debug-gcc/c/examples/broker+0x447563) in close
> 6: ==================
> 6: ==================
> 6: WARNING: ThreadSanitizer: data race (pid=7358)
> 6:   Write of size 4 at 0x7b7000017818 by main thread:
> 6:     #0 stop_polling /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:313:10 (libqpid-proton-proactor.so.1+0xd22a)
> 6:     #1 pconnection_cleanup /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:896:3 (libqpid-proton-proactor.so.1+0xcacb)
> 6:     #2 pconnection_process /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c (libqpid-proton-proactor.so.1+0xca31)
> 6:     #3 proactor_do_epoll /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c (libqpid-proton-proactor.so.1+0x9a17)
> 6:     #4 pn_proactor_wait /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2156:10 (libqpid-proton-proactor.so.1+0x95fe)
> 6:     #5 broker_thread /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:434:32 (broker+0x4cb503)
> 6:     #6 main /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:473:3 (broker+0x4cb3d3)
> 6: 
> 6:   Previous read of size 4 at 0x7b7000017818 by thread T2 (mutexes: write M2241):
> 6:     #0 rearm /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:720:48 (libqpid-proton-proactor.so.1+0x8703)
> 6:     #1 pconnection_rearm /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1014:5 (libqpid-proton-proactor.so.1+0xcf78)
> 6:     #2 pconnection_done /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1051:14 (libqpid-proton-proactor.so.1+0x9e24)
> 6:     #3 pn_proactor_done /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2166:5 (libqpid-proton-proactor.so.1+0x9e24)
> 6:     #4 broker_thread /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:439:5 (broker+0x4cb4e6)
> 6: 
> 6:   Location is heap block of size 1880 at 0x7b7000017800 allocated by thread T2:
> 6:     #0 calloc <null> (broker+0x45b124)
> 6:     #1 pn_listener_accept2 /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1795:40 (libqpid-proton-proactor.so.1+0x7d91)
> 6:     #2 handle /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:306:6 (broker+0x4cb794)
> 6:     #3 broker_thread /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:437:14 (broker+0x4cb794)
> 6: 
> 6:   Mutex M2241 (0x7b7000017ee8) created at:
> 6:     #0 pthread_mutex_init <null> (broker+0x42e922)
> 6:     #1 pmutex_init /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:105:7 (libqpid-proton-proactor.so.1+0x560a)
> 6:     #2 pconnection_setup /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:853:3 (libqpid-proton-proactor.so.1+0x560a)
> 6:     #3 pn_listener_accept2 /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1797:21 (libqpid-proton-proactor.so.1+0x7dd8)
> 6:     #4 handle /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:306:6 (broker+0x4cb794)
> 6:     #5 broker_thread /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:437:14 (broker+0x4cb794)
> 6: 
> 6:   Thread T2 (tid=7361, running) created by main thread at:
> 6:     #0 pthread_create <null> (broker+0x42e5a2)
> 6:     #1 main /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:471:5 (broker+0x4cb3af)
> 6: 
> 6: SUMMARY: ThreadSanitizer: data race /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:313:10 in stop_polling
> 6: ==================
> 6: ==================
> 6: WARNING: ThreadSanitizer: data race (pid=7358)
> 6:   Write of size 4 at 0x7b7000013018 by thread T1:
> 6:     #0 stop_polling /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:313:10 (libqpid-proton-proactor.so.1+0xd22a)
> 6:     #1 pconnection_cleanup /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:896:3 (libqpid-proton-proactor.so.1+0xcacb)
> 6:     #2 pconnection_process /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c (libqpid-proton-proactor.so.1+0xca31)
> 6:     #3 proactor_do_epoll /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c (libqpid-proton-proactor.so.1+0x9a17)
> 6:     #4 pn_proactor_wait /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2156:10 (libqpid-proton-proactor.so.1+0x95fe)
> 6:     #5 broker_thread /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:434:32 (broker+0x4cb503)
> 6: 
> 6:   Previous read of size 4 at 0x7b7000013018 by thread T2 (mutexes: write M2164):
> 6:     #0 rearm /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:720:48 (libqpid-proton-proactor.so.1+0x8703)
> 6:     #1 pconnection_rearm /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1014:5 (libqpid-proton-proactor.so.1+0xcf78)
> 6:     #2 pconnection_done /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1051:14 (libqpid-proton-proactor.so.1+0x9e24)
> 6:     #3 pn_proactor_done /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2166:5 (libqpid-proton-proactor.so.1+0x9e24)
> 6:     #4 broker_thread /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:439:5 (broker+0x4cb4e6)
> 6: 
> 6:   Location is heap block of size 1880 at 0x7b7000013000 allocated by thread T1:
> 6:     #0 calloc <null> (broker+0x45b124)
> 6:     #1 pn_listener_accept2 /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1795:40 (libqpid-proton-proactor.so.1+0x7d91)
> 6:     #2 handle /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:306:6 (broker+0x4cb794)
> 6:     #3 broker_thread /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:437:14 (broker+0x4cb794)
> 6: 
> 6:   Mutex M2164 (0x7b70000136e8) created at:
> 6:     #0 pthread_mutex_init <null> (broker+0x42e922)
> 6:     #1 pmutex_init /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:105:7 (libqpid-proton-proactor.so.1+0x560a)
> 6:     #2 pconnection_setup /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:853:3 (libqpid-proton-proactor.so.1+0x560a)
> 6:     #3 pn_listener_accept2 /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1797:21 (libqpid-proton-proactor.so.1+0x7dd8)
> 6:     #4 handle /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:306:6 (broker+0x4cb794)
> 6:     #5 broker_thread /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:437:14 (broker+0x4cb794)
> 6: 
> 6:   Thread T1 (tid=7360, running) created by main thread at:
> 6:     #0 pthread_create <null> (broker+0x42e5a2)
> 6:     #1 main /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:471:5 (broker+0x4cb3af)
> 6: 
> 6:   Thread T2 (tid=7361, running) created by main thread at:
> 6:     #0 pthread_create <null> (broker+0x42e5a2)
> 6:     #1 main /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:471:5 (broker+0x4cb3af)
> 6: 
> 6: SUMMARY: ThreadSanitizer: data race /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:313:10 in stop_polling
> 6: ==================
> 6: ==================
> 6: WARNING: ThreadSanitizer: data race (pid=7358)
> 6:   Write of size 8 at 0x7ba0000000d0 by thread T1:
> 6:     #0 close <null> (broker+0x447563)
> 6:     #1 pclosefd /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:805:13 (libqpid-proton-proactor.so.1+0xcaf4)
> 6:     #2 pconnection_cleanup /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:898:5 (libqpid-proton-proactor.so.1+0xcaf4)
> 6:     #3 pconnection_process /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c (libqpid-proton-proactor.so.1+0xca31)
> 6:     #4 proactor_do_epoll /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c (libqpid-proton-proactor.so.1+0x9a17)
> 6:     #5 pn_proactor_wait /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2156:10 (libqpid-proton-proactor.so.1+0x95fe)
> 6:     #6 broker_thread /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:434:32 (broker+0x4cb503)
> 6: 
> 6:   Previous read of size 8 at 0x7ba0000000d0 by thread T2:
> 6:     [failed to restore the stack]
> 6: 
> 6:   Location is file descriptor 13 created by thread T1 at:
> 6:     #0 accept <null> (broker+0x435375)
> 6:     #1 listener_accept_lh /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1682:27 (libqpid-proton-proactor.so.1+0xdd1c)
> 6:     #2 listener_process /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1718:9 (libqpid-proton-proactor.so.1+0xdd1c)
> 6:     #3 proactor_do_epoll /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2146:17 (libqpid-proton-proactor.so.1+0x99ad)
> 6:     #4 pn_proactor_wait /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2156:10 (libqpid-proton-proactor.so.1+0x95fe)
> 6:     #5 broker_thread /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:434:32 (broker+0x4cb503)
> 6: 
> 6:   Thread T1 (tid=7360, running) created by main thread at:
> 6:     #0 pthread_create <null> (broker+0x42e5a2)
> 6:     #1 main /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:471:5 (broker+0x4cb3af)
> 6: 
> 6:   Thread T2 (tid=7361, running) created by main thread at:
> 6:     #0 pthread_create <null> (broker+0x42e5a2)
> 6:     #1 main /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:471:5 (broker+0x4cb3af)
> 6: 
> 6: SUMMARY: ThreadSanitizer: data race (/home/jdanek/repos/qpid/qpid-proton/cmake-build-debug-gcc/c/examples/broker+0x447563) in close
> 6: ==================
> 6: ==================
> 6: WARNING: ThreadSanitizer: data race (pid=7358)
> 6:   Write of size 8 at 0x7ba000000150 by main thread:
> 6:     #0 close <null> (broker+0x447563)
> 6:     #1 pclosefd /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:805:13 (libqpid-proton-proactor.so.1+0xcaf4)
> 6:     #2 pconnection_cleanup /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:898:5 (libqpid-proton-proactor.so.1+0xcaf4)
> 6:     #3 pconnection_process /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c (libqpid-proton-proactor.so.1+0xca31)
> 6:     #4 proactor_do_epoll /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c (libqpid-proton-proactor.so.1+0x9a17)
> 6:     #5 pn_proactor_wait /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2156:10 (libqpid-proton-proactor.so.1+0x95fe)
> 6:     #6 broker_thread /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:434:32 (broker+0x4cb503)
> 6:     #7 main /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:473:3 (broker+0x4cb3d3)
> 6: 
> 6:   Previous read of size 8 at 0x7ba000000150 by thread T2 (mutexes: write M2241):
> 6:     #0 epoll_ctl <null> (broker+0x42f1a8)
> 6:     #1 rearm /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:720:7 (libqpid-proton-proactor.so.1+0x871a)
> 6:     #2 pconnection_rearm /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1014:5 (libqpid-proton-proactor.so.1+0xcf78)
> 6:     #3 pconnection_done /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1051:14 (libqpid-proton-proactor.so.1+0x9e24)
> 6:     #4 pn_proactor_done /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2166:5 (libqpid-proton-proactor.so.1+0x9e24)
> 6:     #5 broker_thread /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:439:5 (broker+0x4cb4e6)
> 6: 
> 6:   Location is file descriptor 21 created by thread T2 at:
> 6:     #0 accept <null> (broker+0x435375)
> 6:     #1 listener_accept_lh /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1682:27 (libqpid-proton-proactor.so.1+0xdd1c)
> 6:     #2 listener_process /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1718:9 (libqpid-proton-proactor.so.1+0xdd1c)
> 6:     #3 proactor_do_epoll /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2146:17 (libqpid-proton-proactor.so.1+0x99ad)
> 6:     #4 pn_proactor_wait /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:2156:10 (libqpid-proton-proactor.so.1+0x95fe)
> 6:     #5 broker_thread /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:434:32 (broker+0x4cb503)
> 6: 
> 6:   Mutex M2241 (0x7b7000017ee8) created at:
> 6:     #0 pthread_mutex_init <null> (broker+0x42e922)
> 6:     #1 pmutex_init /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:105:7 (libqpid-proton-proactor.so.1+0x560a)
> 6:     #2 pconnection_setup /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:853:3 (libqpid-proton-proactor.so.1+0x560a)
> 6:     #3 pn_listener_accept2 /home/jdanek/repos/qpid/qpid-proton/c/src/proactor/epoll.c:1797:21 (libqpid-proton-proactor.so.1+0x7dd8)
> 6:     #4 handle /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:306:6 (broker+0x4cb794)
> 6:     #5 broker_thread /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:437:14 (broker+0x4cb794)
> 6: 
> 6:   Thread T2 (tid=7361, running) created by main thread at:
> 6:     #0 pthread_create <null> (broker+0x42e5a2)
> 6:     #1 main /home/jdanek/repos/qpid/qpid-proton/c/examples/broker.c:471:5 (broker+0x4cb3af)
> 6: 
> 6: SUMMARY: ThreadSanitizer: data race (/home/jdanek/repos/qpid/qpid-proton/cmake-build-debug-gcc/c/examples/broker+0x447563) in close
> 6: ==================
> 6: ________________________________ stderr(7358) ________________________________
> 6: 
> 6: 
> 6: ----------------------------------------------------------------------
> 6: Ran 1 test in 4.261s
> 6: 
> 6: FAILED (errors=1)
>  6/24 Test  #6: c-fdlimit-tests ..................***Failed    4.35 sec
> {noformat}
> I used clang 9.0.0 with tsan to compile. I am logging this because I intend to start writing suppression file, and I need a Jira number to reference.



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