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https://issues.apache.org/jira/browse/DISPATCH-1956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17355121#comment-17355121
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ASF GitHub Bot commented on DISPATCH-1956:
------------------------------------------
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> Potential deadlock: logging lock vs entity cache lock
> -----------------------------------------------------
>
> Key: DISPATCH-1956
> URL: https://issues.apache.org/jira/browse/DISPATCH-1956
> Project: Qpid Dispatch
> Issue Type: Bug
> Components: Router Node
> Affects Versions: 1.15.0
> Reporter: Ken Giusti
> Assignee: Michael Goulish
> Priority: Major
> Labels: deadlock, tsan
> Fix For: 1.17.0
>
> Attachments: tsan.supp
>
>
> {noformat}
> WARNING: ThreadSanitizer: lock-order-inversion (potential deadlock)
> (pid=1474955)
> Cycle in lock order graph: M11 (0x7b10000002c0) => M9 (0x7b1000000240) =>
> M11
>
> Mutex M9 acquired here while holding mutex M11 in main thread:
> #0 pthread_mutex_lock <null> (libtsan.so.0+0x528ac)
> #1 sys_mutex_lock
> /home/kgiusti/work/dispatch/qpid-dispatch/src/posix/threading.c:57
> (libqpid-dispatch.so+0x8cb7d)
> #2 push_event
> /home/kgiusti/work/dispatch/qpid-dispatch/src/entity_cache.c:63
> (libqpid-dispatch.so+0x6fa13)
> #3 qd_entity_cache_add
> /home/kgiusti/work/dispatch/qpid-dispatch/src/entity_cache.c:69
> (libqpid-dispatch.so+0x6fc26)
> #4 qd_alloc_init
> /home/kgiusti/work/dispatch/qpid-dispatch/src/alloc_pool.c:302
> (libqpid-dispatch.so+0x5878b)
> #5 qd_alloc /home/kgiusti/work/dispatch/qpid-dispatch/src/alloc_pool.c:318
> (libqpid-dispatch.so+0x5878b)
> #6 new_qd_log_entry_t /home/kgiusti/work/dispatch/qpid-dispatch/src/log.c:61
> (libqpid-dispatch.so+0x75891)
> #7 qd_vlog_impl /home/kgiusti/work/dispatch/qpid-dispatch/src/log.c:426
> (libqpid-dispatch.so+0x76205)
> #8 qd_log_impl /home/kgiusti/work/dispatch/qpid-dispatch/src/log.c:453
> (libqpid-dispatch.so+0x76580)
> #9 qd_python_log
> /home/kgiusti/work/dispatch/qpid-dispatch/src/python_embedded.c:547
> (libqpid-dispatch.so+0x8d1cb)
> #10 <null> <null> (libpython3.8.so.1.0+0x12a23b)
> #11 main_process
> /home/kgiusti/work/dispatch/qpid-dispatch/router/src/main.c:95
> (qdrouterd+0x40281c)
> #12 main /home/kgiusti/work/dispatch/qpid-dispatch/router/src/main.c:367
> (qdrouterd+0x4024fc)
>
> Hint: use TSAN_OPTIONS=second_deadlock_stack=1 to get more informative
> warning message
>
> Mutex M11 acquired here while holding mutex M9 in main thread:
> #0 pthread_mutex_lock <null> (libtsan.so.0+0x528ac)
> #1 sys_mutex_lock
> /home/kgiusti/work/dispatch/qpid-dispatch/src/posix/threading.c:57
> (libqpid-dispatch.so+0x8cb7d)
> #2 qd_vlog_impl /home/kgiusti/work/dispatch/qpid-dispatch/src/log.c:425
> (libqpid-dispatch.so+0x76200)
> #3 qd_log_impl /home/kgiusti/work/dispatch/qpid-dispatch/src/log.c:453
> (libqpid-dispatch.so+0x76580)
> #4 qd_python_log
> /home/kgiusti/work/dispatch/qpid-dispatch/src/python_embedded.c:547
> (libqpid-dispatch.so+0x8d1cb)
> #5 <null> <null> (libpython3.8.so.1.0+0x12a23b)
> #6 main_process
> /home/kgiusti/work/dispatch/qpid-dispatch/router/src/main.c:95
> (qdrouterd+0x40281c)
> #7 main /home/kgiusti/work/dispatch/qpid-dispatch/router/src/main.c:367
> (qdrouterd+0x4024fc)
>
> SUMMARY: ThreadSanitizer: lock-order-inversion (potential deadlock)
> (/lib64/libtsan.so.0+0x528ac) in __interceptor_pthread_mutex_lock
> {noformat}
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