I am not sure if I have an answer but hopefully this will help. I posted a similar problem back in April - I have the same exact environment. The one thing that I have noticed is from the same code in my server.xml my maxProcessors="75". I have noticed that when Tomcat does hang I try to shut down Tomcat but the process does not die so I actually have to kill it. At that point I've checked my logs and see:
Apr 4, 2004 2:19:43 PM org.apache.tomcat.util.threads.ThreadPool logFull SEVERE: All threads (75) are currently busy, waiting. Increase maxThreads (75) or check the servlet status After posting to the list it was suggested to increase the number of servers for the connector to match what Apache allows. Unfortunately I got so wrapped up in my code that I never made this change. Just today I have increased the number of maxProcessors in Tomcat to 150 which is equal to the number of MaxClients in Apache - I am hoping this change helps. Ken - when you shutdown Tomcat do you run into the same problem of having to actually kill the process? Also afterwards do you see a similar message in your catalina.out? Are the number of MaxClients in Apache the same as the number of maxProcessors you have in your server.xml? So then the next question that comes to mind if this setting does the trick how many processors/clients are too many? For example what if changing Tomcat to match Apache settings causes the application to still max out but at the new number of maxProcessors. I would imagine the next step would be to increase both but what number is too high? Denise Mangano Director of Technical Services Complus Data Innovations, Inc. 914-747-1200 -----Original Message----- From: Innovest Ken [mailto:[EMAIL PROTECTED] Sent: Monday, May 24, 2004 11:08 PM To: [EMAIL PROTECTED] Subject: Tomcat 4.1.30 Hung!!! With High Traffic hello all, Currently, I have Tomcat 4.1.30 running on Linux Redhat 9, using jdk 1.4.2_03. It is now running live and every day it will hang at least once. We are unable to see any error message in the log file. The site is having a hit of 20 request per second with most of the requests need the database connection. I did a thread dump before the tomcat hangs, but it is too big to be displayed here. I can post any more info upon request. Any help??? Thanks Here is part of the server.xml: <Connector className="org.apache.coyote.tomcat4.CoyoteConnector" acceptCount="150" bufferSize="2048" compression="off" connectionLinger="-1" connectionTimeout="20000" connectionUploadTimeout="300000" debug="0" disableUploadTimeout="true" enableLookups="false" maxKeepAliveRequests="100" maxProcessors="150" minProcessors="50" port="80" protocolHandlerClassName="org.apache.coyote.http11.Http11Protocol" proxyPort="0" redirectPort="8443" scheme="http" secure="false" serverSocketTimeout="0" tcpNoDelay="true" useURIValidationHack="false"> <Factory className="org.apache.catalina.net.DefaultServerSocketFactory" /> </Connector> innovest __________________________________ Do you Yahoo!? Friends. Fun. Try the all-new Yahoo! Messenger. http://messenger.yahoo.com/ --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
