Web server hangs during no apparent activity

[bekeland]

Using v 4.53, have a web server that has been running without issues for months.  About three weeks ago the client says it stops working several times a day and they have to reset the server because the web server is running as a service.  The server is a Godaddy virtual server. 

I've been monitoring it with logging and a utility that requests a small test page every 5 minutes and running the server as a desktop app on the VDS for testing.  It is hanging.  I check my logs and there is no apparent activity at the time it hangs.  When I run it on the desktop I see the app on the task bar, but the visible window has vanished and I have to kill it.  It happens regularly at night, but not at the same times.  The couple of packet sniffers I've tried to install won't work on the virtual server, they need a nic.

Couple of questions:  Is there a packet sniffer that will work on a VDS so I can see everything that is coming into the web server?  Or can I trap/log the data/request in NetTalk before it does anything with it?  The first place I'm trying to do stuff is in the WebHandler ProcessLink embed. 

At this point all I can think is that my web server is being queried by a web spider or probed by some bot.  Any advice would be appreciated.

Brian Ekeland

[bruce2]

The very first place to see incoming data would be the process method in the webserver procedure. So that is a good place to put a trace statement.

On a physical machine I would be suspicious of the power saving settings for your network card - not sure how that applies to a godaddy vm though.