[Serusers] SER stops responding

[Cameron Beattie]

I have experienced (for the second time) a situation where SER (0.9.1) has 
stopped processing all register requests. Note I am also running mediaproxy 
1.3.0.

TOP shows 4 ser processes running each using between 20-30% CPU.  There is 
one zombie process which is shown as [SER] <defunct> when I do a ps ax.
There are only 5 running processes (4 SER + top).

This is a test server that is not doing anything else and I am simply trying 
to register 1 UA against it. The server was running fine for a few days and 
then suddenly went AWOL.

I looked back through the log and didn't find anything untoward.

Any suggestions on what's the best way to try and find out what's causing 
it? Killing SER and starting again worked but I'd rather try to find out 
what went wrong. Maybe these are the pleasures of using a non-stable 
version?

Regards

Cameron