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CGI app seems to write its own state info to disk?

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Message        sober          Post subject: CGI app seems to write its own 
state info to disk?Posted: Fri Nov 02, 2012 9:23 am                         
Joined: Wed Sep 08, 2010 9:05 am
Posts: 3                Setup:  MacOS X Mountain Lion (10.8.1) server running a 
cgi app created with 2012r1.2 with lots of simultaneous users hitting the app.

All of a sudden, the app locked up--completely unresponsive--and additional 
users could not connect.

The server's CPU shot up to 100% and Activity Monitor showed dozens of Perl 
processes.

I killed the cgi app but the CPU shot back to 100% with tons of perl processes 
upon the next attempted connection.

I killed the web server through the Server app, but when I turned it back on, 
the same thing happened.

I rebooted the server, but the same thing happened.

I renamed the folder containing the app to prevent users from being able to 
connect to it (thinking that perhaps there was a bug triggered by several users 
hitting the app at the same time while it started up). When I tried a single 
connection to the app in its new location, the same thing happened (a bunch of 
perl processes, 100% CPU, blank screen in my web browser).

I upgraded to 10.8.2 on the server, hoping that maybe that would work better. 
Exact same thing happened.

Finally, in desperation, I rebuilt the app (zero changes to the code) and 
copied the new build onto the server and it worked fine.

All I can think of is two possibilities of what is going on:
1) The actual application itself had somehow become corrupted.
2) The application saved some sort of state info to disk which--in this 
case--was causing it to lock up every time it tried to restart.

Do WE apps store any state info to disk which would/could be reloaded at the 
next launch?

Has anyone seen anything like this before?   
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