Thanks for the reply Per... Tomcat and IIS are running on the same machine, with no external load balancer or firewall between IIS and Tomcat.
When the connection is lost, IIS displays either "service is unavailable" or a "503 error" message. I only have maxThreads=400, because I didn't think it would hurt anything. I was running with far fewer maxThreads and had the same problem. The machine is a quad-core CPU with 4 gigs of ram and the load is very light. I'll look into your other suggestions. Also, I noticed in my original post that the redirectPort was wrong and I fixed that :) Any other ideas out there? -Travis ----- Original Message ----- From: "Per Johnsson" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, December 13, 2007 11:52 PM Subject: FW: Tomcat and IIS losing their link (Tomcat maillist bounced my mail so I send it to you directly./per) Hi! Some questions: - Is the tomcat and IIS running on the same machine? - What's the result when the connection is lost? Service unavaible from IIS? - Is there any loadbalancer, firewall between the IIS and tomcat? - You have maxThreads=400, are there 400 concurrant requests ever during high load? We had some similar issues and we didn't find any good solution for it but a lot of small adjustments made it better like: - Lower the maxthreads (we had very cpu consuming requests at some times) we went from like 300 to 20 I beleive. - Installing java 1.6 which is much more efficient. - Using the latest APR and Isapi dll. /Per Jonsson -----Original Message----- From: Travis Haagen [mailto:[EMAIL PROTECTED] Sent: den 14 december 2007 05:08 To: Tomcat Posts Subject: Tomcat and IIS losing their link Hello, I've got IIS 6.0 linked with Tomcat 5.5.25 (with JDK 1.5.0_14-b03 and AJP dll) via the ISAPI connector (JK 1.2.25) on Windows 2003 Server, and during high traffic periods, the connection between IIS and Tomcat is being severed. This has been occurring in the mid-afternoon every day since this server went live and to get it running again, I've had to restart Tomcat. The peak connections to IIS during one of the days was just under 100, so this isn't really all that high of traffic. The isapi_redirect.log isn't much help. It has only been logging errors after the connection to Tomcat has been broken. Tomcat itself hasn't logged anything of relevance and I don't actually think that Tomcat is affected when the link is broken, but as I mentioned earlier, I have to restart Tomcat to get it to reconnect with IIS. Most of my configuration settings came from this website: http://wiki.jboss.org/wiki/Wiki.jsp?page=OptimalMod_jk1.2Configuration Here are the relevant workers.properties settings: worker.ajp13w.type=ajp13 worker.ajp13w.host=localhost worker.ajp13w.port=8009 worker.ajp13w.lbfactor=1 worker.ajp13w.connect_timeout=10000 worker.ajp13w.prepost_timeout=10000 worker.ajp13w.socket_timeout=10 worker.ajp13w.connection_pool_timeout=600 worker.ajp13w.connection_pool_size=350 Here are the relevant server.xml settings: <Connector port="8443" maxHttpHeaderSize="8192" maxThreads="400" minSpareThreads="50" maxSpareThreads="150" enableLookups="false" disableUploadTimeout="true" acceptCount="100" scheme="https" secure="true" SSLEngine="on" SSLPassword="removed" SSLCertificateFile="removed" SSLCertificateKeyFile="removed" /> <Connector port="8009" redirectPort="8444" protocol="AJP/1.3" connectionTimeout="600000" enableLookups="false" maxThreads="400" minSpareThreads="50" maxSpareThreads="150" /> I just configured IIS 6.0 to run in IIS 5.0 isolation mode and that's the end of my ideas for fixing this issue. The only other ISAPI filters that I'm running are ASP.NET_1.1.4322.2307 and ISAPI_Rewrite3 (for URL rewriting). IIS web site connections is set to 'unlimited', connection timeout is 120 seconds, HTTP Keep-Alives is enabled. Until the crazy thing stops working, everything is fine. Any help will be greatly appreciated. Thanks, Travis --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
