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https://issues.apache.org/jira/browse/QPID-8512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17415926#comment-17415926
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Ivan Sudakov commented on QPID-8512:
------------------------------------
The same problem exists on Windows 7, but my program crashes on shutdown only
in release build
On Fedora 31, the program hangs for a minute on shutdown and then exits normally
> QPID threads hang on shutdown
> -----------------------------
>
> Key: QPID-8512
> URL: https://issues.apache.org/jira/browse/QPID-8512
> Project: Qpid
> Issue Type: Bug
> Components: C++ Client
> Environment: QPID 0.8 on SuSE Linux Enterprise Server 15 (SLES),
> Service Pack 2 (SP2) (SLES 15 SP2)
> Reporter: Karthik
> Priority: Major
>
> QPID Threads in the client hang on shutdown. This issue seems to specifically
> occur in SLES 15 SP2 (SuSE Linux Service Pack 2). It was working fine on SLES
> 15 SP1 and older versions like SLES11, 12 etc.
> QPID Client/Broker Version: 0.8
> On debugging into the QPID code, observed that the hang occurs in this
> function and in the ::epoll_wait call.
> *Code-Reference*:
> {{*qpid/sys/epoll/EpollPoller.cpp*}}
> {{Poller::Event Poller::wait(Duration timeout) {}}
> {{ .}}{{..}}
> {{ *int rc = ::epoll_wait(impl->epollFd, &epe, 1, timeoutMs);*}}
> {{ ...}}
> {{}}}
>
> Thread backtrace on shutdown which hang:
> {{Thread }}{{8}} {{(Thread }}{{0x7fffe27fc700}} {{(LWP }}{{29944}}{{)):}}
> {{#}}{{0}} {{0x00007ffff2dff126}} {{in epoll_pwait () from
> /lib64/libc.so.}}{{6}}
> {{#}}{{1}} {{0x00007ffff5abc461}} {{in qpid::sys::Poller::wait
> (}}{{this}}{{=}}{{0x6eb230}}{{, timeout=...) at
> qpid/sys/epoll/EpollPoller.cpp:}}{{568}}
> {{#}}{{2}} {{0x00007ffff5abcf31}} {{in qpid::sys::Poller::run
> (}}{{this}}{{=}}{{0x6eb230}}{{) at qpid/sys/epoll/EpollPoller.cpp:}}{{518}}
> {{#}}{{3}} {{0x00007ffff5ab3caa}} {{in qpid::sys::(anonymous
> namespace)::runRunnable (p=}}{{0x6}}{{) at qpid/sys/posix/Thread.cpp:}}{{35}}
> {{#}}{{4}} {{0x00007ffff77b44f9}} {{in start_thread () from
> /lib64/libpthread.so.}}{{0}}
> {{#}}{{5}} {{0x00007ffff2dfefbf}} {{in clone () from /lib64/libc.so.}}{{6}}
>
> {{Thread }}{{3}} {{(Thread }}{{0x7ffff1681700}} {{(LWP }}{{29939}}{{)):}}
> {{#}}{{0}} {{0x00007ffff2dff126}} {{in epoll_pwait () from
> /lib64/libc.so.}}{{6}}
> {{#}}{{1}} {{0x00007ffff5abc461}} {{in qpid::sys::Poller::wait
> (}}{{this}}{{=}}{{0x6eb230}}{{, timeout=...) at
> qpid/sys/epoll/EpollPoller.cpp:}}{{568}}
> {{#}}{{2}} {{0x00007ffff5abcf31}} {{in qpid::sys::Poller::run
> (}}{{this}}{{=}}{{0x6eb230}}{{) at qpid/sys/epoll/EpollPoller.cpp:}}{{518}}
> {{#}}{{3}} {{0x00007ffff5ab3caa}} {{in qpid::sys::(anonymous
> namespace)::runRunnable (p=}}{{0x6}}{{) at qpid/sys/posix/Thread.cpp:}}{{35}}
> {{#}}{{4}} {{0x00007ffff77b44f9}} {{in start_thread () from
> /lib64/libpthread.so.}}{{0}}
> {{#}}{{5}} {{0x00007ffff2dfefbf}} {{in clone () from /lib64/libc.so.}}{{6}}
>
> {{Thread }}{{1}} {{(Thread }}{{0x7ffff7fb97c0}} {{(LWP }}{{29842}}{{)):}}
> {{#}}{{0}} {{0x00007ffff77b58bd}} {{in pthread_join () from
> /lib64/libpthread.so.}}{{0}}
> {{#}}{{1}} {{0x00007ffff5ab3db3}} {{in qpid::sys::Thread::join
> (}}{{this}}{{=<optimized out>) at qpid/sys/posix/Thread.cpp:}}{{70}}
> {{#}}{{2}} {{0x00007ffff5716b09}} {{in qpid::client::(anonymous
> namespace)::IOThread::~IOThread (}}{{this}}{{=}}{{0x7ffff597b6a0}}
> {{<qpid::client::(anonymous namespace)::theIO()::io>, __in_chrg=<optimized
> out>) at qpid/client/ConnectionImpl.cpp:}}{{140}}
> {{#}}{{3}} {{0x00007ffff2d3f138}} {{in __run_exit_handlers () from
> /lib64/libc.so.}}{{6}}
> {{#}}{{4}} {{0x00007ffff2d3f18a}} {{in exit () from /lib64/libc.so.}}{{6}}
> {{#}}{{5}} {{0x00007ffff2d27351}} {{in __libc_start_main () from
> /lib64/libc.so.}}{{6}}
> {{#}}{{6}} {{0x000000000040f179}} {{in _start () at
> ../sysdeps/x86_64/elf/start.S:}}{{113}}
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