serialization error

From: Cris Daniluk (cris.danilu..mail.com)
Date: Fri Dec 01 2006 - 10:48:38 EST

  • Next message: Andrus Adamchik: "Re: Persistence and inheritance : a noob question"

    I've turned on Tomcat clustering on an existing application, and thus
    the session-bound user DataContext is being serialized across the
    wire. Whenever I connect to a Tomcat node, the nodes that are
    replicated to report the attached exception. Based on the line number
    (Cayenne 1.2.1), it looks like the objectStore has null elements in
    it, which does not make any sense.

    Any ideas?

    Cris

    ERROR [org.apache.catalina.cluster.tcp.TcpReplicationThread[1]] -
    2006-12-01 10:44:42,264 Manager [/integration]: Unable to receive
    message through TCP channel
    java.lang.NullPointerException
            at org.objectstyle.cayenne.access.DataContext.readObject(DataContext.java:1806)
            at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
            at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
            at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
            at java.lang.reflect.Method.invoke(Method.java:585)
            at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:946)
            at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1809)
            at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1719)
            at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
            at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1908)
            at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1832)
            at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1719)
            at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
            at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1908)
            at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1832)
            at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1719)
            at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
            at java.io.ObjectInputStream.readObject(ObjectInputStream.java:348)
            at org.apache.catalina.cluster.session.DeltaRequest$AttributeInfo.readExternal(DeltaRequest.java:334)
            at org.apache.catalina.cluster.session.DeltaRequest.readExternal(DeltaRequest.java:246)
            at org.apache.catalina.cluster.session.DeltaManager.loadDeltaRequest(DeltaManager.java:697)
            at org.apache.catalina.cluster.session.DeltaManager.handleSESSION_DELTA(DeltaManager.java:1572)
            at org.apache.catalina.cluster.session.DeltaManager.messageReceived(DeltaManager.java:1522)
            at org.apache.catalina.cluster.session.DeltaManager.messageDataReceived(DeltaManager.java:1271)
            at org.apache.catalina.cluster.session.ClusterSessionListener.messageReceived(ClusterSessionListener.java:85)
            at org.apache.catalina.cluster.tcp.SimpleTcpCluster.receive(SimpleTcpCluster.java:1167)
            at org.apache.catalina.cluster.tcp.ClusterReceiverBase.messageDataReceived(ClusterReceiverBase.java:426)
            at org.apache.catalina.cluster.io.ObjectReader.execute(ObjectReader.java:107)
            at org.apache.catalina.cluster.tcp.TcpReplicationThread.drainChannel(TcpReplicationThread.java:138)
            at org.apache.catalina.cluster.tcp.TcpReplicationThread.run(TcpReplicationThread.java:69)

    This archive was generated by hypermail 2.0.0 : Fri Dec 01 2006 - 10:49:07 EST