[Zope] ZServer crash, Zope 2.6.2b3 RH9

[Dieter Maurer]

Dennis Allison wrote at 2003-12-12 10:00 -0800:
>RH9 has had major problems with programs that use threads.  I just
>experienced a server crash (ouch!) which looks like it may be due to
>RH9 threading, but I am not sure.  And, of course, there's not much to go
>on in the logs, there's no chance of reproducing the situation, etc.
>
>Basically Zope died at line 241 in ZServer/HTTPResponse.py.  This is in 
>the __init__ method of the ChannelPipe class (and "Experimental" pipe
>from ZPublisher to a ZServer Channel).  The error was 
>
>ZServer Server Error: exception.TypeError, attribute name must be a
>string: file: $SOFTWAREHOME/ZServer/HTTResponse.py line: 241
>
>repeated many times.
>
>ZServer eventually tries to close the channel (uncaptured Python
>exception), but the error persists.  Shutdown of Zope was normal and
>restarting cleared the problem.
>
>Has anyone else seen this kind of behavior?  I'll file a bug report 
>on it if it happens again.  

This does not look like a threading bug but like memory corruption:

  The code in "ZServer.HTTPResponse.ChannelPipe.__init__"
  (at least in my Zope 2.6.2 (final)) cannot raise
  the above exception under normal circumstances.
  All attribute accesses are constant, i.e. verified
  by the compiler.

  Apparently, one of the attribute name objects changed type --
  which can happen when they were overwritten in a
  memory corruption.

-- 
Dieter