[SOLVED] IOException while loading persisted sessions: java.io.InvalidClassException

PROBLEM:
SEVERE: IOException while loading persisted sessions: java.io.InvalidClassException: org.exoplatform.services.wsrp2.consumer.impl.helpers.UserSessionImpl; no valid constructor
java.io.InvalidClassException: org.exoplatform.services.wsrp2.consumer.impl.helpers.UserSessionImpl; no valid constructor
at java.io.ObjectStreamClass.(ObjectStreamClass.java:455)
at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:297)
at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:531)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1552)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1466)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1699)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:348)
at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1439)
...

SOLUTION:
Author: G R (http://www.jguru.com/guru/viewbio.jsp?EID=999272), Sep 14, 2002
Just wanted to correct that if the super class does not have a no argument constructor, then following exception is thrown when you try to deserialize the class. java.io.InvalidClassException: no valid constructor

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