[Boost-bugs] [Boost C++ Libraries] #11964: asio async_resolve cannot be cancelled

Subject: [Boost-bugs] [Boost C++ Libraries] #11964: asio async_resolve cannot be cancelled
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2016-02-08 09:53:07

#11964: asio async_resolve cannot be cancelled
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 Reporter:  sven_nilsson@…                 |      Owner:  chris_kohlhoff
     Type:  Bugs                           |     Status:  new
Milestone:  To Be Determined               |  Component:  asio
  Version:  Boost 1.59.0                   |   Severity:  Problem
 Keywords:  asio asynchronous DNS resolve  |
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 The asio '''async_resolve''' (both the udp and tcp resolver) is
 incorrectly implemented (on win32) as a '''synchronous resolve'''
 performed in a thread.

 This has the unfortunate effect that, when the DNS server is not
 responding, the application will hang for ~20 seconds. The DNS operation
 is ongoing in the io_service, and thus the io_service destructor must wait
 for the thread to finish. I tried several methods in an effort to cancel
 it, but none worked.

 Since the average user has approximately 5 seconds of patience with a non-
 responding application before killing it with task manager, I really think
 this needs to be fixed.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11964>
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