I have a virtuell server from strato (german hoster) running on ubuntu Ubuntu 12.04.1 LTS with plesk.
Lately I have problems that my webserver once in a while doesn't respond request. so I startet watchdog with a check frequence from a minute. Apache serves php5.
Watchdog Nginx message
The Web Proxy Server (Nginx) service on host xyz.de is down. The problem was discovered on Mär 13, 2014 06:12 .
Watchdog apache message
The Web Server (Apache) service on host xyz.de is down. The problem was discovered on Mär 16, 2014 03:13 .
Turning of nginx, apache has the same problems.
The services stop and start again straigt away. Services are down for for something less than a minute. Watchdog sends me a message one minute later that the services (apache/nginx) started again. It seems that apache/nginx anyhow just crash. Neither apache nor nginx error.logs show anything.
Any idea why this "crashes" happen and how I can figure out what may be the problem and how to solve it?
I really appreciate your help