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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=8295 Session deserialization fails to load all classes correctly Summary: Session deserialization fails to load all classes correctly Product: Tomcat 4 Version: 4.0.3 Final Platform: PC OS/Version: Windows NT/2K Status: NEW Severity: Normal Priority: Other Component: Catalina AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] ... since the ContextClassLoader isn't set properly at this point of time. Scenario: One of our base classes uses the following code within a static{} initialisation block: class CoreObject { static{ loggingChannel = (LoggingChannel)Class.forName(loggingClassName, true, Thread.currentThread().getContextClassLoader()).newInstance(); } } An instance of this class is serialized as part of the session context. After restart of Tomcat 4.03 we receive the following stacktrace: java.lang.ClassNotFoundException: de.gauss.base.logging.FileLoggingChannel at org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLoader.jav a:1127) at org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLoader.jav a:992) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:195) at de.gauss.base.CoreObject.<clinit>(CoreObject.java:101) at java.io.ObjectStreamClass.hasStaticInitializer(Native Method) at java.io.ObjectStreamClass.computeSerialVersionUID(ObjectStreamClass.java:923) at java.io.ObjectStreamClass.access$200(ObjectStreamClass.java:46) at java.io.ObjectStreamClass$2.run(ObjectStreamClass.java:420) at java.security.AccessController.doPrivileged(Native Method) at java.io.ObjectStreamClass.init(ObjectStreamClass.java:401) at java.io.ObjectStreamClass.lookupInternal(ObjectStreamClass.java:112) at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:59) at java.io.ObjectStreamClass.lookupInternal(ObjectStreamClass.java:88) at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:59) at java.io.ObjectStreamClass.lookupInternal(ObjectStreamClass.java:88) at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:59) at java.io.ObjectStreamClass.lookupInternal(ObjectStreamClass.java:88) at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:59) at java.io.ObjectStreamClass.lookupInternal(ObjectStreamClass.java:88) at java.io.ObjectStreamClass.setClass(ObjectStreamClass.java:566) at java.io.ObjectInputStream.inputClassDescriptor(ObjectInputStream.java:936) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:366) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236) at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1186) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236) at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1268 ) at org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java: 810) at org.apache.catalina.session.StandardManager.load(StandardManager.java:411) at org.apache.catalina.session.StandardManager.start(StandardManager.java:617) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1104) at org.apache.catalina.core.StandardContext.start(StandardContext.java:3345) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:785) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:454) at org.apache.catalina.core.StandardHost.install(StandardHost.java:714) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:300) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:389) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:232) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.ja va:155) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1131) at org.apache.catalina.core.StandardHost.start(StandardHost.java:614) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:343) at org.apache.catalina.core.StandardService.start(StandardService.java:388) at org.apache.catalina.core.StandardServer.start(StandardServer.java:506) at org.apache.catalina.startup.Catalina.start(Catalina.java:781) at org.apache.catalina.startup.Catalina.execute(Catalina.java:681) at org.apache.catalina.startup.Catalina.process(Catalina.java:179) at java.lang.reflect.Method.invoke(Native Method) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:243) This exception changes the way our classes behave. The only known workaround is to delete the SESSIONS.ser before we restart Tomcat. Q: Is there any switch to disable session persistence? Thanks -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
