[Pythonmac-SIG] Problems with multithreaded I/O or import, an yone?

[Schollnick, Benjamin]

Jack,

	Please be aware, that I have not had a chance to try this on a
equivalent
Windows NT system... So this maybe a _python_ issue, not a MacPython
Issue...

	When I use httplib, to connect to a Docushare Server, and retrieve
the
resulting XML file, readlines, or read(-1), doesn't seem to work
correctly...
readlines should read the entire document and then return... My
understanding is the
same with read(-1)....

	Instead I was forced to write a "looping" logic, which reads back
"chunks" of
data, which I can merge....  Otherwise I get incomplete documents....

	I doubt this is any help, but that's the only major problem I've
seen with
MacPython.... And of course, the lack of a easy API to the clock... But I
got around
that one with calldll.... (But it's still kludgy!!) <grin>

			- Benjamin

-----Original Message-----
From: Jack Jansen [mailto:jack@oratrix.nl]
Sent: Tuesday, August 28, 2001 3:29 PM
To: pythonmac-sig@python.org
Subject: [Pythonmac-SIG] Problems with multithreaded I/O or import,
anyone?


Folks,
I'm looking for problems with either I/O or imports in multithreaded
MacPython programs. There's the famous Last Bug that needs to be fixed
before MacPython 2.2a2 is ready, and I'm looking for more data points.

The problem I'm seeing is that test.test_threaded_import either hangs
(on my G4) or seriously corrupts the heap and crashes my machine (on
my iMac). However, multithreaded debugging is not fun, especially not
deep down inside GUSI:-(

I think this problem might well be related to MacPython hanging on a
multiprocessor OSX machine, and maybe also to the random
once-in-a-blue-moon I/O failures if you do really large file copies.

If the problem is indeed in the area where I expect it to be the
problem has been around since at least 2.1. So I'm inviting you to
share even vague "I did this and it didn't work" stories (as long as
they're related to MacPython and I/O:-).
--
Jack Jansen             | ++++ stop the execution of Mumia Abu-Jamal ++++
Jack.Jansen@oratrix.com | ++++ if you agree copy these lines to your sig
++++
www.cwi.nl/~jack        | ++++ see http://www.xs4all.nl/~tank/ ++++

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