Tomcat 4 Persistence problem

[Michał Trojanowski <mt...@adgam.com.pl>]

Hi. I've got a problem with PersistentManager in Tomcat 4. I'm trying
to configure Tomcat so as it could swap sessions to disk when there
is lack of memory. I've set the following parameters in server.xml in
my app context:

<Manager className="org.apache.catalina.session.PersistentManager"
              debug="0"
              saveOnRestart="true"
              maxActiveSessions="-1"
              minIdleSwap="-1"
              maxIdleSwap="-1"
              maxIdleBackup="-1">
                <Store className="org.apache.catalina.session.FileStore">
                </Store>
</Manager>


Unfortunately instead of session swapping I always get "OutOfMemory Error"
when I open too many sessions. All my objects are serializable correctly
because
sessions are swapped at shutdown. Can anybody help me set this correctly?
Thanks in advance.

Michal


The stack of it is:

javax.servlet.ServletException: Servlet execution threw an exception
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Unknown
Source)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(Unknown Source)
 at org.apache.catalina.core.StandardWrapperValve.invoke(Unknown Source)
 at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source)
 at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source)
 at org.apache.catalina.core.ContainerBase.invoke(Unknown Source)
 at org.apache.catalina.core.StandardContextValve.invoke(Unknown Source)
 at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source)
 at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source)
 at org.apache.catalina.core.ContainerBase.invoke(Unknown Source)
 at org.apache.catalina.core.StandardContext.invoke(Unknown Source)
 at org.apache.catalina.core.StandardHostValve.invoke(Unknown Source)
 at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source)
 at org.apache.catalina.valves.AccessLogValve.invoke(Unknown Source)
 at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source)
 at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source)
 at org.apache.catalina.core.ContainerBase.invoke(Unknown Source)
 at org.apache.catalina.core.StandardEngineValve.invoke(Unknown Source)
 at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source)
 at org.apache.catalina.valves.RequestDumperValve.invoke(Unknown Source)
 at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown Source)
 at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source)
 at org.apache.catalina.core.ContainerBase.invoke(Unknown Source)
 at org.apache.catalina.connector.http.HttpProcessor.process(Unknown Source)
 at org.apache.catalina.connector.http.HttpProcessor.run(Unknown Source)
 at java.lang.Thread.run(Thread.java:484)
----- Root Cause -----
java.lang.OutOfMemoryError
 <<no stack trace available>>