I have one Apache http server version 2.2.3 (on Red Hat Enterprise Linux 5) and three Tomcat 6 version 6.0.18 servers (on Windows Server 2003) running in my cluster. Everything "appears" to be working well. It looks like it is using RoundRobin because every time I refresh the page it goes from web001 -> web002 -> web003 -> web001 -> etc. I used some of the examples that are provided with Tomcat in the "examples" directory - specifically the "Sessions" servlet and it looks like my sessions are staying the same and holding information. My issue is this. When I stop one of the Tomcat servers (let's say web002), I will sometimes get the following error message when I refresh the page:
- - - - - - - - - - Proxy Error The proxy server received an invalid response from an upstream server. The proxy server could not handle the request GET /examples/instance.html. Reason: Error reading from remote server Apache/2.2.3 (Red Hat) Server at 150.37.0.20 Port 80 - - - - - - - - - - I don't receive this error message every single time I refresh the page but I do get it often. It looks like Apache http server is still trying to access the Tomcat server web002 even though it is down. Does this sound like I have an incorrect configuration to anybody or is this normal? I would not think that it was normal, as clustering is supposed to prevent errors like this. I have been following the examples in the O'Reilly book "Tomcat: The Definitive Guide" in chapter 10 - "Tomcat Clustering". Any help anybody can provide will be greatly appreciated. Thank you for reading, have a good day. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
