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https://issues.apache.org/jira/browse/DISPATCH-1956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17347354#comment-17347354
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Jiri Daněk commented on DISPATCH-1956:
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[~mgoulish], [~michaelgoulish] try the perms now, please (which of these two
accounts do you actually use?)
How did you test this? The issue does not say what to run to get the deadlock
report, so what test did you try?
> 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
>
>
> {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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