Re: question about Uncaught NSException and else

[Richard Frith-Macdonald]

On Monday, September 29, 2003, at 02:12 AM, Derek Zhou wrote:

> Hi, all
> My program is randomly seeing "Uncaught exception NSLockException, 
> reason:
> Thread attempted to recursively lock". However, my program does not 
> infer any
> NSLock; in fact, my program is single threaded. My program does use 
> runloop,
> DO and socket so each run is different. How can I get a backtrace out 
> of the
> uncaught exception? The weird thing is it runs fine in gdb.
> Also, I'd like to hear some advises on tracking down memory leakage.
> Thank you in advance!

I have had this problem for some months ... but occurring very 
infrequently and
only when calling stuff from java (which is why I haven't managed to 
track it
down).

I can't really help with an answer, but if you can come up with any 
sort of
testcase which can reproduce the problem in pure ObjC code, I'd be more
than happy to take it, refine it if I can, and track down/fix the 
problem.

My only suggestion at this point is that it's probably some sort of 
race condition,
so constructing some sort of system to stress the code you have might 
lead to
the problem being reproduced in a reasonable period of time, rather 
than having
to leave a server running for days/weeks to get a recurrence.