Hello,
It is very tricky to find out why our server rans periodically (between 12 and 24 hours) into Java heap space errors. We have a virtual Windows 2003 Standard R2 Server 32-bit, with 4 GB physically RAM. Two Tomcats 6.0.32 (serve different webapps) 32 bit with a Apache 2.2.14 Frontend Webserver on the same server. We use the 1.6 Update 25 Server JVM 32 bit of Sun. The errormessages from catalina log are : "SCHWERWIEGEND: Exception initializing page context java.lang.OutOfMemoryError: Java heap space 16.05.2011 23:59:37 org.apache.jasper.runtime.JspFactoryImpl internalGetPageContext SCHWERWIEGEND: Exception initializing page context java.lang.OutOfMemoryError: Java heap space 16.05.2011 23:59:37 org.apache.jasper.runtime.JspFactoryImpl internalGetPageContext SCHWERWIEGEND: Exception initializing page context java.lang.OutOfMemoryError: Java heap space 16.05.2011 23:59:49 org.apache.catalina.core.ApplicationDispatcher invoke SCHWERWIEGEND: Servlet.service() for servlet Controller threw exception java.lang.OutOfMemoryError: Java heap space 16.05.2011 23:59:49 org.apache.catalina.core.StandardWrapperValve invoke SCHWERWIEGEND: Servlet.service() for servlet default threw exception java.lang.OutOfMemoryError: Java heap space 16.05.2011 23:59:54 org.apache.catalina.core.StandardWrapperValve invoke SCHWERWIEGEND: Servlet.service() for servlet Controller threw exception java.lang.OutOfMemoryError: Java heap space 16.05.2011 23:59:55 org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor processChildren SCHWERWIEGEND: Exception invoking periodic operation: java.lang.OutOfMemoryError: Java heap space 16.05.2011 23:59:55 org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor processChildren SCHWERWIEGEND: Exception invoking periodic operation: java.lang.OutOfMemoryError: Java heap space 16.05.2011 23:59:55 org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor processChildren SCHWERWIEGEND: Exception invoking periodic operation: java.lang.OutOfMemoryError: Java heap space " The Tomcat Java Opts Settings in the Console: -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled -XX:+CMSPermGenSweepingEnabled -Xms128m -Xmx1024m -XX:MaxPermSize=256m The windows process grow up and consuming 1020 MB of RAM. The 2nd Tomcat service was not started and we ran although in the Memory leak. What is the best way to find out the best parameters for the settings of Tomcat? Best regards Alexander Diedler
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