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Posted to dev@qpid.apache.org by "Jiri Daněk (Jira)" <ji...@apache.org> on 2021/05/21 15:05:00 UTC

[jira] [Updated] (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:all-tabpanel ]

Jiri Daněk updated PROTON-2133:
-------------------------------
    Labels: race-condition tsan  (was: )

> 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
>              Labels: race-condition, tsan
>
> {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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