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From Bruce Wayne <>
Subject Application Logout Issues
Date Wed, 16 Sep 2009 14:00:03 GMT
Users keep getting logged out of our Java apps within a minute or two for no
apparent reason.Below are my settings, any help would be appreciated.

I am running Red Hat Linux 2.6.18-164.el5 #1 SMP  x86_64 x86_64 x86_64
GNU/Linux with Tomcat 6 as seen below:
# /opt/tomcat/bin/
Using CATALINA_BASE:   /opt/tomcat
Using CATALINA_HOME:   /opt/tomcat
Using CATALINA_TMPDIR: /opt/tomcat/temp
Using JRE_HOME:       /usr/java/jdk1.6.0_16
Server version: Apache Tomcat/6.0.20
Server built:   May 14 2009 01:13:50
Server number:
OS Name:        Linux
OS Version:     2.6.18-164.el5
Architecture:   amd64
JVM Version:    1.6.0_16-b01
JVM Vendor:     Sun Microsystems Inc.
My system has 6GB of RAM.

I have tried various JAVA_OPTS, the most current one is at the bottom:
#JAVA_OPTS="$JAVA_OPTS -Xmx3072M -Xms3072M"
#JAVA_OPTS="$JAVA_OPTS -Djava.awt.headless=true -Dfile.encoding=UTF-8
-server -Xms2048m -Xmx2048m -XX:NewSize=1024m -XX:MaxNewSize=1024m
-XX:PermSize=1024m -XX:MaxPermSize=1024m -XX:+DisableExplicitGC"
#JAVA_OPTS="$JAVA_OPTS -Djava.awt.headless=true -Dfile.encoding=UTF-8
-server -Xms2048m -Xmx2048m -XX:NewSize=1024m -XX:MaxNewSize=1024m
-XX:PermSize=1024m -XX:MaxPermSize=1024m -XX:+CMSClassUnloadingEnabled
-XX:+CMSPermGenSweepingEnabled -XX:+UseConcMarkSweepGC"
#JAVA_OPTS="$JAVA_OPTS -Djava.awt.headless=true -Dfile.encoding=UTF-8
-server -Xms2048m -Xmx2048m -XX:NewSize=1024m -XX:MaxNewSize=1024m
-XX:PermSize=1024m -XX:MaxPermSize=1024m -XX:+UseConcMarkSweepGC"
JAVA_OPTS="$JAVA_OPTS -Djava.awt.headless=true -Dfile.encoding=UTF-8 -server
-Xms2048m -Xmx2048m -XX:NewSize=1024m -XX:MaxNewSize=1024m
-XX:PermSize=1024m -XX:MaxPermSize=1024m"

My timeout settings are as follows:
# grep -i timeout conf/*
conf/server.xml:               connectionTimeout="20000"
conf/server.xml:               acceptCount="10" debug="0"
conf/web.xml:  <!-- You can set the default session timeout (in minutes) for
all newly   -->
conf/web.xml:        <session-timeout>30</session-timeout>


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