Re: [Boost-bugs] [Boost C++ Libraries] #11069: io_service hangs for 5 minutes

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #11069: io_service hangs for 5 minutes
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-03-06 14:43:31

#11069: io_service hangs for 5 minutes
-------------------------------+----------------------------
  Reporter:  dmitrmax@…        |      Owner:  chris_kohlhoff
      Type:  Bugs              |     Status:  new
 Milestone:  To Be Determined  |  Component:  asio
   Version:  Boost 1.55.0      |   Severity:  Problem
Resolution:                    |   Keywords:
-------------------------------+----------------------------

Comment (by dmitrmax@…):

 The bug was fixed. It is a race condition. It happens in following
 conditions:
 1) io_service::run_one() is used to execute works;
 2) only two threads calling run_one() left;
 3) one of these threads is executing handler completion;
 4) handler posts another operation into the op_queue and after it the
 first thread doesn't call run_one() anymore.
 5) meanwhile after the first thread started handler completion but before
 handler posted the new op,  the second thread is running reactor
 (epoll_reactor in my case).

 After the first thread has executed the handler completion, it should
 check for new works, and if there are some new works, wake up a thread or
 interrupt reactor running. I put this logic into work_cleanup object.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11069#comment:1>
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