[JBoss-user] EJB2.0 JBoss 3.0.4 NullPointerException on invocation of abstractgetter

[Brandon, Raymond]

Hi all,

 

I have an entity bean that retreives data from the following table:

 

CREATE TABLE testnullvalues.DomainClass (
    id                             INTEGER                        NOT NULL,
    f1                             DOUBLE PRECISION      NULL,
    f2                             VARCHAR (40)                NULL,
    PRIMARY KEY (id)
);

 

According to the DBMS table definition, only the primary key is required. I have a row of data in this table of which only the primary key has a value and the other fields are NULL.

 

When invoking the abstract getter of field "f1" I get the stack-trace below. Why is this happening? This code works perfectly on WebLogic 7.

 

Regards,

 

Raymond Brandon

 

---- stack-trace ----

 

TRACE  EjbTier     (DomainClassBean.java:100) - DomainClassBean() constructor called.
TRACE  EjbTier     (DomainClassBean.java:100) - DomainClassBean() constructor called.
TRACE  EjbTier     (DomainClassBean.java:100) - DomainClassBean() constructor called.
TRACE  EjbTier     (DomainClassBean.java:100) - DomainClassBean() constructor called.
INFO   org.jboss.ejb.EjbModule (Logger.java:149) - Started
INFO   org.jboss.system.server.Server (Logger.java:149) - JBoss (MX MicroKernel) [3.0.4 Date:200211021607] Started in 0m:16s:141ms
INFO   OptimalJ    (LoggingSocketServer.java:106) - Connected to client at /127.0.0.1
INFO   WebTier     (DomainClassBrowseAction.java:163) - Starting the retrieve action...
INFO   WebTier     (DomainClassBrowseAction.java:170) - Doing a full retrieve.
INFO   WebTier     (DomainClassBrowseAction.java:289) - Retrieving with filter ByProfileOnKey from bfDomainClass.
INFO   WebTier     (DomainClassDomainClassBusinessFacade.java:439) - retrieving DomainClassUpdateObject objects...
TRACE  EjbTier     (DomainClassBean.java:100) - DomainClassBean() constructor called.
TRACE  EjbTier     (DomainClassBean.java:100) - DomainClassBean() constructor called.
TRACE  EjbTier     (DomainClassBean.java:288) - DomainClassBean.setEntityContext(EntityContext context)
TRACE  EjbTier     (DomainClassBean.java:288) - DomainClassBean.setEntityContext(EntityContext context)
TRACE  EjbTier     (DomainClassBean.java:100) - DomainClassBean() constructor called.
TRACE  EjbTier     (DomainClassBean.java:100) - DomainClassBean() constructor called.
TRACE  EjbTier     (DomainClassBean.java:288) - DomainClassBean.setEntityContext(EntityContext context)
TRACE  EjbTier     (DomainClassBean.java:288) - DomainClassBean.setEntityContext(EntityContext context)
TRACE  EjbTier     (DomainClassBean.java:326) - DomainClassBean.ejbActivate()
TRACE  EjbTier     (DomainClassBean.java:326) - DomainClassBean.ejbActivate()
TRACE  EjbTier     (DomainClassBean.java:382) - DomainClassBean.ejbLoad(): key=id(1)
TRACE  EjbTier     (DomainClassBean.java:382) - DomainClassBean.ejbLoad(): key=id(1)
TRACE  EjbTier     (DomainClassBean.java:529) - SADomainClass.getData()
TRACE  EjbTier     (DomainClassBean.java:529) - SADomainClass.getData()
ERROR  org.jboss.ejb.plugins.LogInterceptor (Logger.java:194) - EJBException, causedBy:
java.lang.NullPointerException
        at testnullvalues.application.ejb.DomainClassBean$Proxy.getF1(<generated>)
        at testnullvalues.application.ejb.DomainClassBean$SADomainClass.getData(DomainClassBean.java:538)
        at testnullvalues.application.ejb.DomainClassBean.initCRC(DomainClassBean.java:267)
        at testnullvalues.application.ejb.DomainClassBean.ejbLoad(DomainClassBean.java:384)
        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:324)
        at org.jboss.ejb.plugins.CMPPersistenceManager.invokeLoad(CMPPersistenceManager.java:551)
        at org.jboss.ejb.plugins.CMPPersistenceManager.loadEntity(CMPPersistenceManager.java:413)
        at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.loadEntity(CachedConnectionInterceptor.java:353)
        at org.jboss.ejb.plugins.EntitySynchronizationInterceptor.invoke(EntitySynchronizationInterceptor.java:251)
        at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:186)
        at org.jboss.ejb.plugins.EntityReentranceInterceptor.invoke(EntityReentranceInterceptor.java:90)
        at org.jboss.ejb.plugins.EntityInstanceInterceptor.invoke(EntityInstanceInterceptor.java:163)
        at org.jboss.ejb.plugins.EntityLockInterceptor.invoke(EntityLockInterceptor.java:107)
        at org.jboss.ejb.plugins.EntityCreationInterceptor.invoke(EntityCreationInterceptor.java:69)
        at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:107)
        at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:178)
        at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:60)
        at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:130)
        at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:204)
        at org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:493)
        at org.jboss.ejb.Container.invoke(Container.java:712)
        at org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:1058)
        at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517)
        at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:382)
        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:324)
        at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:261)
        at sun.rmi.transport.Transport$1.run(Transport.java:148)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
        at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
        at java.lang.Thread.run(Thread.java:536)
ERROR  WebTier     (DomainClassDomainClassBusinessFacade.java:1019) - caught RemoteException while finding on the DomainClassBean!
ERROR  WebTier     (DomainClassDomainClassBusinessFacade.java:1021) - rethrowing as AlturaRuntimeException

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