I am getting the following stack trace (see below) with tomcat6 container. However the error goes away when I start tomcat with security manager enabled.

I am using ehcache 2.1.0 with hibernate 3.5.4-Final and spring 3.0.2-Final

Ehcache documentation says security manager is not required.

Any help w/r/t running tomcat6 w/o security manager to avoid ClassNotFoundException will be greatly appreciated.

thanx in advance.

Caused by: java.lang.ClassNotFoundException: com.playspan.catalog2.model.Offer2PubId (no security manager: RMI class loader disabled)
at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:375) ~[na:1.6.0_20]
at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:165) ~[na:1.6.0_20]
at java.rmi.server.RMIClassLoader$2.loadClass(RMIClassLoader.java:620) ~[na:1.6.0_20]
at java.rmi.server.RMIClassLoader.loadClass(RMIClassLoader.java:247) ~[na:1.6.0_20]
at sun.rmi.server.MarshalInputStream.resolveClass(MarshalInputStream.java:197) ~[na:1.6.0_20]
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1575) ~[na:1.6.0_20]
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496) ~[na:1.6.0_20]
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1732) ~[na:1.6.0_20]
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) ~[na:1.6.0_20]
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947) ~[na:1.6.0_20]
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871) ~[na:1.6.0_20]
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) ~[na:1.6.0_20]
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) ~[na:1.6.0_20]
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947) ~[na:1.6.0_20]
at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:480) ~[na:1.6.0_20]
at net.sf.ehcache.distribution.EventMessage.readObject(EventMessage.java:138) ~[ehcache-core-2.1.0.jar:na]
at sun.reflect.GeneratedMethodAccessor345.invoke(Unknown Source) ~[na:na]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) ~[na: