[Mono-list] SIGQUIT thread dumps

Nikki Locke nikki at trumphurst.com
Wed May 24 11:30:06 EDT 2006

Would it be more helpful if the thread stack dumps produced by sending a 
running Mono process a SIGQUIT came out in order, one thread at a time, 
instead of all mixed up?

I have a socket server application with lots of threads (one per incoming 
connection, plus a few more), which eventually stops working after about 6 
hours (it accepts incoming connections, but does not appear to handle their 

When I send it a SIGQUIT, I get lots of stuff all muddled up - stack trace 
lines from different threads interleaved, and (I suspect) not even always 
in the right order (i.e. a caller sometimes appearing before a callee).

Now I have a vague suspicion that there is a problem with Monitor and 
inter-thread locking - I have had threads Waiting on a Pulse which never 
seem to get the Pulse. Is the same locking used during thread dumping, and 
could it possibly be going wrong?

Nikki Locke, Trumphurst Ltd.      PC & Unix consultancy & programming

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