Persistant Session error in catalina.out

[Patrick Heppler]

Hi,

I switched from Railo to Lucee last weekend. Now I see some weird errors in catalina.out regarding persistant sessions:

Exception loading sessions from persistent storage

java.lang.ClassNotFoundException: lucee.runtime.type.scope.JSession
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1305)
        at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1157)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:344)
        at org.apache.catalina.util.CustomObjectInputStream.resolveClass(CustomObjectInputStream.java:74)
        at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1613)
        at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1518)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1774)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)
        at org.apache.catalina.session.StandardSession.doReadObject(StandardSession.java:1634)
        at org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:1099)
        at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:261)
        at org.apache.catalina.session.StandardManager.load(StandardManager.java:180)
        at org.apache.catalina.session.StandardManager.startInternal(StandardManager.java:460)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5171)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:725)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:714)
        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1069)
        at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1719)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)

This error only shows up in 2 of 3 Contexts. But I'm not actively using persistant sessions, maybe a wrong setting in the admin?

[Colby Litnak]

tomcat has a persistent session storage mechanism. it is on by default. Tomcat get's all bent out of shape because lucee uses a child classloader to load the lucee classes (including the JSession), and therefore can't serialize and deserialize them. The child classloader change is helpful to allow easy lucee upgrades. I have a change that I did a pull request for in railo ( back in the old days :) ) that allows you to use the tomcat classloader as an option as a configuration item in the railo servlet. Enabling the change disables easy upgrades (you have to make the .rc file a jar file and put it in the class path), but it also allows you to use some cool j2EE container features that are out there. 

I am long winded, the short answer would be to disable session persistence in tomcat. 

http://tomcat.apache.org/tomcat-7.0-doc/config/manager.html#Disable_Session_Persistence

[Mark Drew]

Awesome that you finally got to the bottom of this. When I was doing load balancing with tomcat + apache of railo servers I kept getting the same serialisation problem with tomcat. The solution actually in Railo is to use a persistent sessions storage like MongoDB or something like that. 

I wonder if for Lucee V5 with OSGI this could work?

MD 

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[Geoff Parkhurst]

I have been struggling with this in the past:

https://bitbucket.org/lucee/lucee/issue/84/sessionrotate-creates-jsessionid

Would that be connected? i.e. when a CFML session is rotated, the
underlying tomcat persistent session kicks in and gives you a
jsessionid?

> https://groups.google.com/d/msgid/lucee/16387696-797D-4AC1-9808-3678D43E0A92%40gmail.com.

[Michael Offner]

Very intressting, I have to checkout what that means for Lucee 5 and OSGi. with the current version we have a custom made classloading architecture.

But with Lucee 5 we are depending on OSGi, I'm sure that topic already get discussed somewhere. 

Mucha

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