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Posted to dev@qpid.apache.org by "Jiri Daněk (Jira)" <ji...@apache.org> on 2021/09/24 20:40:00 UTC
[jira] [Commented] (PROTON-2436) TSAN race in epoll.c post_event
with raw connection
[ https://issues.apache.org/jira/browse/PROTON-2436?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17419972#comment-17419972 ]
Jiri Daněk commented on PROTON-2436:
------------------------------------
It has been seen before, see DISPATCH-2181
> TSAN race in epoll.c post_event with raw connection
> ---------------------------------------------------
>
> Key: PROTON-2436
> URL: https://issues.apache.org/jira/browse/PROTON-2436
> Project: Qpid Proton
> Issue Type: Bug
> Components: proton-c
> Affects Versions: proton-c-0.36.0
> Reporter: Ken Giusti
> Assignee: Clifford Jansen
> Priority: Major
>
> today's github CI run of dispatch+proton main kicked up a tsan error in proton I've never seen before:
> https://github.com/apache/qpid-dispatch/runs/3700836319?check_suite_focus=true#step:27:2142
>
> {noformat}
> 70: WARNING: ThreadSanitizer: data race (pid=3075)
> 70: Write of size 4 at 0x7b680000dd38 by main thread (mutexes: write M257):
> 70: #0 post_event /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-proton/c/src/proactor/epoll.c:2304 (libqpid-proton-proactor.so.1+0x14108)
> 70: #1 poller_do_epoll /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-proton/c/src/proactor/epoll.c:2534 (libqpid-proton-proactor.so.1+0x14108)
> 70: #2 next_event_batch /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-proton/c/src/proactor/epoll.c:2438 (libqpid-proton-proactor.so.1+0x14108)
> 70: #3 pn_proactor_wait /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-proton/c/src/proactor/epoll.c:2650 (libqpid-proton-proactor.so.1+0x14622)
> 70: #4 thread_run /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/src/server.c:1118 (qdrouterd+0x4d83a9)
> 70: #5 qd_server_run /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/src/server.c:1527 (qdrouterd+0x4d904c)
> 70: #6 main_process /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/router/src/main.c:115 (qdrouterd+0x426cdc)
> 70: #7 main /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/router/src/main.c:369 (qdrouterd+0x42623c)
> 70:
> 70: Previous read of size 4 at 0x7b680000dd38 by thread T3 (mutexes: write M499):
> 70: #0 pni_raw_connection_process /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-proton/c/src/proactor/epoll_raw_connection.c:355 (libqpid-proton-proactor.so.1+0x108ec)
> 70: #1 process /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-proton/c/src/proactor/epoll.c:2230 (libqpid-proton-proactor.so.1+0x108ec)
> 70: #2 next_event_batch /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-proton/c/src/proactor/epoll.c:2419 (libqpid-proton-proactor.so.1+0x108ec)
> 70: #3 pn_proactor_wait /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-proton/c/src/proactor/epoll.c:2650 (libqpid-proton-proactor.so.1+0x14622)
> 70: #4 thread_run /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/src/server.c:1118 (qdrouterd+0x4d83a9)
> 70: #5 _thread_init /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/src/posix/threading.c:172 (qdrouterd+0x47fe2d)
> 70:
> 70: Location is heap block of size 1536 at 0x7b680000d800 allocated by main thread:
> 70: #0 calloc <null> (libtsan.so.0+0x32b3e)
> 70: #1 pn_raw_connection /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-proton/c/src/proactor/epoll_raw_connection.c:168 (libqpid-proton-proactor.so.1+0xdf82)
> 70: #2 _do_reconnect /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/src/adaptors/http1/http1_server.c:451 (qdrouterd+0x43da47)
> 70: #3 qd_timer_visit /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/src/timer.c:316 (qdrouterd+0x4daddf)
> 70: #4 handle /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/src/server.c:1018 (qdrouterd+0x4d60d6)
> 70: #5 thread_run /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/src/server.c:1133 (qdrouterd+0x4d84e7)
> 70: #6 qd_server_run /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/src/server.c:1527 (qdrouterd+0x4d904c)
> 70: #7 main_process /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/router/src/main.c:115 (qdrouterd+0x426cdc)
> 70: #8 main /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/router/src/main.c:369 (qdrouterd+0x42623c)
> 70:
> 70: Mutex M257 (0x7b640003aa20) created at:
> 70: #0 pthread_mutex_init <null> (libtsan.so.0+0x49603)
> 70: #1 pmutex_init /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-proton/c/src/proactor/epoll-internal.h:323 (libqpid-proton-proactor.so.1+0xd52c)
> 70: #2 pn_proactor /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-proton/c/src/proactor/epoll.c:1941 (libqpid-proton-proactor.so.1+0xd52c)
> 70: #3 qd_server /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/src/server.c:1380 (qdrouterd+0x4d872f)
> 70: #4 qd_dispatch_prepare /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/src/dispatch.c:334 (qdrouterd+0x4604b6)
> 70: #5 ffi_call_unix64 <null> (libffi.so.6+0x6c03)
> 70: #6 main_process /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/router/src/main.c:97 (qdrouterd+0x426c7c)
> 70: #7 main /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/router/src/main.c:369 (qdrouterd+0x42623c)
> 70:
> 70: Mutex M499 (0x7b680000d800) created at:
> 70: #0 pthread_mutex_init <null> (libtsan.so.0+0x49603)
> 70: #1 pmutex_init /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-proton/c/src/proactor/epoll-internal.h:323 (libqpid-proton-proactor.so.1+0x146eb)
> 70: #2 task_init /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-proton/c/src/proactor/epoll.c:224 (libqpid-proton-proactor.so.1+0x146eb)
> 70: #3 praw_connection_init /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-proton/c/src/proactor/epoll_raw_connection.c:141 (libqpid-proton-proactor.so.1+0x146eb)
> 70: #4 pn_proactor_raw_connect /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-proton/c/src/proactor/epoll_raw_connection.c:179 (libqpid-proton-proactor.so.1+0x146eb)
> 70: #5 _do_reconnect /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/src/adaptors/http1/http1_server.c:455 (qdrouterd+0x43daa2)
> 70: #6 qd_timer_visit /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/src/timer.c:316 (qdrouterd+0x4daddf)
> 70: #7 handle /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/src/server.c:1018 (qdrouterd+0x4d60d6)
> 70: #8 thread_run /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/src/server.c:1133 (qdrouterd+0x4d84e7)
> 70: #9 qd_server_run /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/src/server.c:1527 (qdrouterd+0x4d904c)
> 70: #10 main_process /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/router/src/main.c:115 (qdrouterd+0x426cdc)
> 70: #11 main /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/router/src/main.c:369 (qdrouterd+0x42623c)
> 70:
> 70: Thread T3 (tid=3079, running) created by main thread at:
> 70: #0 pthread_create <null> (libtsan.so.0+0x5bf45)
> 70: #1 sys_thread /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/src/posix/threading.c:181 (qdrouterd+0x4802bc)
> 70: #2 qd_server_run /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/src/server.c:1525 (qdrouterd+0x4d902c)
> 70: #3 main_process /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/router/src/main.c:115 (qdrouterd+0x426cdc)
> 70: #4 main /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-dispatch/router/src/main.c:369 (qdrouterd+0x42623c)
> 70:
> 70: SUMMARY: ThreadSanitizer: data race /home/runner/work/qpid-dispatch/qpid-dispatch/qpid-proton/c/src/proactor/epoll.c:2304 in post_event
> 70: ==================
> 70: ThreadSanitizer: reported 1 warnings
> {noformat}
>
>
> Proton main latest (commit 30b245a48d7461fd41854e5bb63eadf19cbb26bd)
>
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