Ok, I'm stumped. I'm running Xymon 4.3.2 on a group of 10 RedHat 5.4 x64 servers, 4 of which are DB servers.

3 out of the four DB servers are showing green, the fourth shows clear for msgs (it says "no data reported") and purple for processes (over 20 days since something was reported).

However, a ps command shows that the processes it should be checking for exist, and I can tail the log to see things scrolling through.

I reinstalled the client on that server and it still won't go green.

The configuration for all four DB servers is the same, outside of one script in ext/ directory.

What could possibly be the problem?