multi-threaded app hangs

[David Konerding]

In article <mailman.40.1071080685.9307.python-list at python.org>, Andrew MacIntyre wrote:
> On Wed, 10 Dec 2003, Sudipto Biswas wrote:
> 
>> I have written a multi-threaded (about 8 threads) networking application
>> with a text-mode interface. It writes to a trace-file in the background.
>> Additionally I have also given some debug prints to STDOUT from
>> different threads. The program runs fine on Python-2.2.2/RH 8.0.
>>
>> But when I move to Python-2.2.2/RH-9.0 the program behaves oddly. It
>> stops suddenly and *does not* give the continueous stream of expected
>> output in STDOUT and tracefile.
> 
> I hear that RH-9 changed some threads support at the kernel level, but
> there is apparently a way to tell it to revert to the older behaviour.
> 
> Sorry I can't give chapter and verse - I've just seen references to this
> in other contexts (ISTR something on kerneltrap.org).

That would be:

export LD_ASSUME_KERNEL=2.2.5