Can you provide the simplest web application (with source) that
replications the problem?
Mark
On 23/05/2024 23:45, Jakub Królikowski wrote:
Hi,
I'm working with Tomcat 10.1.
When a user starts using the store in my web application, I save the
ShopCart object on the "cart" session attribute.
I want the "cart" attributes to return to the session after restarting the
app.
To enable session persistence I added
<Manager pathname="SESSIONS.ser" />
to the Context. It loads the StandardManager.
And this works fine - after reload / restart the object "ShopCart" is back
in the session.
I want to experiment with PersistentManager. Tomcat docs says: "
The persistence across restarts provided by the *StandardManager* is a
simpler implementation than that provided by the *PersistentManager*. If
robust, production quality persistence across restarts is required then the
*PersistentManager* should be used with an appropriate configuration.
"
I hope for a Listener of deserialization of the session attributes.
The new Manager configuration looks like this:
<Manager className="org.apache.catalina.session.PersistentManager"
maxActiveSessions="2" saveOnRestart="true">
<Store className="org.apache.catalina.session.FileStore" directory=
"c:\tomcat10\sessionperm"/>
</Manager>
But it doesn't work. After restart I get this exception:
java.lang.ClassNotFoundException: ....ShopCart
at
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1332)
at
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1144)
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Class.java:534)
at java.base/java.lang.Class.forName(Class.java:513)
at
org.apache.catalina.util.CustomObjectInputStream.resolveClass(CustomObjectInputStream.java:158)
at
java.base/java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:2061)
at
java.base/java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1927)
at
java.base/java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2252)
at
java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1762)
at
java.base/java.io.ObjectInputStream.readObject(ObjectInputStream.java:540)
at
java.base/java.io.ObjectInputStream.readObject(ObjectInputStream.java:498)
at
org.apache.catalina.session.StandardSession.doReadObject(StandardSession.java:1198)
at
org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:831)
at org.apache.catalina.session.FileStore.load(FileStore.java:203)
at org.apache.catalina.session.StoreBase.processExpires(StoreBase.java:138)
at
org.apache.catalina.session.PersistentManagerBase.processExpires(PersistentManagerBase.java:409)
at
org.apache.catalina.session.ManagerBase.backgroundProcess(ManagerBase.java:587)
at
org.apache.catalina.core.StandardContext.backgroundProcess(StandardContext.java:4787)
at
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1172)
at
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1176)
at
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1176)
at
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1154)
at
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
at
java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:358)
at
java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
at java.base/java.lang.Thread.run(Thread.java:1583)
I guess this means that the two managers use ClassLoader differently.
How to get the PersistentManager to work in this case?
Best regards,
--
Jakub Królikowski
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
For additional commands, e-mail: users-h...@tomcat.apache.org
