[Zope-dev] TCP CLOSE_WAIT leaks

Dieter Maurer dieter at handshake.de
Wed Mar 22 14:58:41 EST 2006


Alan Milligan wrote at 2006-3-22 10:12 +1100:
>I've been noticing a situation for some time that my 2.8.5 Z2 is running
>out of threads.  When doing an lsof on it, I see a large number of TCP
>handles in CLOSE_WAIT state.
>
>It seems something's not properly clearing down the connection to
>release the thread.

I doubt that this is the case.

  The IO, including the closing of the connection, is
  handled by the ZServer thread. This is a single thread.
  You would immediately observe should it block (Zope would
  be irresponsive).

  When the connection is closed, the Zope worker thread has
  already been released. By the way, their number is fixed
  (and usually small).

-- 
Dieter


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