On Jan 27, 2010, at 3:07 PM, Graham Dumpleton wrote:
Should restart on a crash automatically.
One cause of what you are seeing is Python threads being deadlocked
and over time causing available threads to be used up.
Are you using multithread daemons? Is your code and third party
modules thread safe?
nope, single-threaded! threads=1 on the WSGIDaemonProcess line.
Try setting 'inactivity-timeout=120' as option to WSGIDaemonProcess.
great, that seems like a good idea anyway.
I would also suggest setting LogLevel to 'info' so that additional
information printed out in error logs about process restarts.
That was going to be my next question ...:)
This way you might get an idea what request threads are actually
doing.
So none of this explains the "missing daemons" problem - where the
daemons are not actually starting back up again... as you can see
below, I set the display-name so that I can look at the daemons with
"ps" - when I do a ps ax | grep <group> I only see a few processes (in
fact one of my servers in production has dropped from the original 24
process, down to 7 yesterday, and now only at 3 today!)
Let me know what you find and also post your actual daemon mode
configuration.
Here's one of them:
#############################
# Project: client
##############################
WSGIDaemonProcess client-freebase.com processes=24 threads=1 display-
name=%{GROU
P} python-path=/mw/app/client_88277/_install/lib/python2.6/site-
packages maximum
-requests=1000
WSGIScriptAlias / /mw/app/client_88277/_install/bin/client.wsgi
# Server configuration for client
<Directory /mw/app/client_88277/_install/bin>
WSGIProcessGroup client-freebase.com
</Directory>
Graham
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