Alex, In a web-tier I lookup the entitybean and invoke the findByProfileOnKey(minId, maxId) on the remote interface of the bean. This returns a collection. I iterate over the collection and per Object in the collection I call a function upon that entity bean object that gets the data from this bean. Inside this function that gets the data, the abstract getters of this bean are invoked, one of which is getF1().
It's this function getF1() that causes the problem. The EJB container implements this method. The field is a double (java primitive type) and the container tries to retrieve the double value from the database which has value NULL. Note that the row in the database was not written by this Bean because EJB2.0 will store the value 0.0. The value NULL was stored manually or by a third party application that uses the same database. JBoss throws a NullPointerException but WebLogic returns the value 0.0. Hope this is clear enough. Raymond Brandon > -----Original Message----- > From: Alex Loubyansky [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, January 21, 2003 14:19 > To: Brandon, Raymond > Subject: Re: [JBoss-user] EJB2.0 JBoss 3.0.4 NullPointerException on > invocation of abstract getter > > > Raymond, > > could you provide more info about the bean and the way you are trying > to load it? > > alex > > Tuesday, January 21, 2003, 2:29:32 PM, you wrote: > > 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$Proxy.getF1(<ge > nerated>) > at > > testnullvalues.application.ejb.DomainClassBean$SADomainClass.g > etData(DomainC > lassBean.java:538) > at > > testnullvalues.application.ejb.DomainClassBean.initCRC(DomainC > lassBean.java: > 267) > at > > testnullvalues.application.ejb.DomainClassBean.ejbLoad(DomainC > lassBean.java: > 384) > at > sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccess > orImpl.java:39 > ) > at > > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMeth > odAccessorImpl > .java:25) > at java.lang.reflect.Method.invoke(Method.java:324) > at > > org.jboss.ejb.plugins.CMPPersistenceManager.invokeLoad(CMPPers > istenceManager > .java:551) > at > > org.jboss.ejb.plugins.CMPPersistenceManager.loadEntity(CMPPers > istenceManager > .java:413) > at > > org.jboss.resource.connectionmanager.CachedConnectionIntercept > or.loadEntity( > CachedConnectionInterceptor.java:353) > at > > org.jboss.ejb.plugins.EntitySynchronizationInterceptor.invoke( > EntitySynchron > izationInterceptor.java:251) > at > > org.jboss.resource.connectionmanager.CachedConnectionIntercept > or.invoke(Cach > edConnectionInterceptor.java:186) > at > > org.jboss.ejb.plugins.EntityReentranceInterceptor.invoke(Entit > yReentranceInt > erceptor.java:90) > at > > org.jboss.ejb.plugins.EntityInstanceInterceptor.invoke(EntityI > nstanceInterce > ptor.java:163) > at > > org.jboss.ejb.plugins.EntityLockInterceptor.invoke(EntityLockI > nterceptor.jav > a:107) > at > > org.jboss.ejb.plugins.EntityCreationInterceptor.invoke(EntityC > reationInterce > ptor.java:69) > at > > org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(Abstrac > tTxInterceptor > .java:107) > at > > org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxI > nterceptorCMT. > java:178) > at > > org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT > .java:60) > at > > org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInter > ceptor.java:13 > 0) > 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(JRMPInvoke > r.java:382) > at > sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccess > orImpl.java:39 > ) > at > > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMeth > odAccessorImpl > .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(TCPTr > ansport.java:7 > 01) > 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 > > > > ------------------------------------------------------- > This SF.NET email is sponsored by: > SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! > http://www.vasoftware.com > _______________________________________________ > JBoss-user mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/jboss-user > -- The contents of this e-mail are intended for the named addressee only. 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