[omniORB] Server hangs

[Mike Olson]

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Hello,

We have been experiencing a concurrency problem with omniORB 3.02,
omniORBpy 1.2, python 1.5.2 and RedHat 7.0 & 6.2.  The call to _this()
does not seem to be thread safe, if more then one thread calls _this on
an object, the entire server hangs.  Attached is a test case that seems
to show this (unless I'm missing something).  untar, compile the IDL,
run ServerImp.py, and a few (2 or more) instances of Client.py.  Some
times it runs for a few minutes, sometimes it hangs within seconds.  If
you notice the code, there is not a heck of a lot going in the code,
just object creation.  Also, in the function "create" on the Factory, if
we uncomment the thread safe lock, we can have many clients run forever.

Has anyone seen behaviour like this before?  Are we doing something
wrong?  I thought at first it might be a problem with the latest
greatest gcc, that's why we tried it on RedHat 6.2.

Any help is appreciated.

Mike


-- 
Mike Olson				 Principal Consultant
mike.olson@fourthought.com               (303)583-9900 x 102
Fourthought, Inc.                         http://Fourthought.com 
Software-engineering, knowledge-management, XML, CORBA, Linux, Python
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