[Boost-bugs] [Boost C++ Libraries] #10387: Strange infinite wait in log\sinks\async_frontend.hpp

Subject: [Boost-bugs] [Boost C++ Libraries] #10387: Strange infinite wait in log\sinks\async_frontend.hpp
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-08-21 04:37:32

#10387: Strange infinite wait in log\sinks\async_frontend.hpp
--------------------------------------+---------------------
 Reporter:  apolukhin                 |      Owner:  andysem
     Type:  Bugs                      |     Status:  new
Milestone:  To Be Determined          |  Component:  log
  Version:  Boost 1.56.0              |   Severity:  Problem
 Keywords:  log async condition wait  |
--------------------------------------+---------------------
 `void asynchronous_sink::stop()` waits for eternity on
 `m_BlockCond.wait(lock);` line. When the call `m_BlockCond.wait(lock);`
 occurs according to VisualStudio debugger there is no others running
 threads, so no one could send a signal.

 I've failed to create a minimal test case, but here is what happens
 according to debugger:

 * main thread exits the main() and enters the internal
 `__crtExitProcess(code);` function (line 639 in `Microsoft Visual Studio
 11.0\VC\crt\src\crt0dat.c`)
 * Somewhere in depths of `ExitProcess(status)` the
 `m_DedicatedFeedingThread` silently disappears. Looks like this happens at
 the point when `m_event.wait();` is called (line 115 in
 `boost\log\sinks\unbounded_fifo_queue.hpp`)
 * `void asynchronous_sink::stop()` is called from the main thread
 * main thread waits on `m_BlockCond.wait(lock);` for eternity (according
 to the debugger there's no more threads remain, only the main thread)

 If boost::log::core::get()->remove_all_sinks(); is called before exiting
 the main, application does not hang.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/10387>
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