EJB and Dictionary Deployment Problem

Hi,
I am new to SAP J2EE engine. I tried deploying a simple EJB application with one entity(CMP) and one stateless session bean but cud not succeed. These were the problems:
1. When I used SAPDB for CMP, it said the table TMP_EMPLOYEE (which the CMP bean maps to, as per persistet.xml) is not found in the catalog. Then I created a dictionary project with the TMP_EMPLOYEE table defined, but I couldn't deploy the dictionary archive. SDM (from the NWS IDE) says this:
Result
=> deployment not executed : file:/C:/DOCUME1/i031278/LOCALS1/Temp/temp11240EmployeeDB.sda
The SDA with development component 'EmployeeDB'/'sap.com'/'localhost'/'2004.11.25.19.41.45' changed its software type from J2EE to JDDSCHEMA. This change is not supported.
Deployment will be aborted.
Deployment exception : Got problems during deployment
2. When I changed the DB provider to MS_SQL_SERVER, which had EMPLOYEEDB/TMP_EMPLOYEE defined, and the SQL server was started, the Table was again not found! (i.e., if I switch off deploy-time table verification, this TableLockingException is thrown. Otherwise ORMappingVerificationException is thrown when the deploy-time verification switch is on).
I have specified the resource-ref etc properly now. This sample application also has a servlet which tries to access the session bean, which inturn talks to the CMP bean. I'm sure that the JNDI names are properly referred.
I am using SAP J2EE engine 6.40 with SP9 and IDE is 2.0.9.
Another thing: I tried to deploy the tutorial 'Car Rental EJB Application' application's dictionary. Even that failed with the same error!
Please help me with this.
Thanks a lot!
Regards,
Prashanth

Problem solved in person

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java.lang.Object javax.naming.InitialContext.lookup(java.lang.String)
void tester.EisBcTester.main(java.lang.String[])
Now, how can the EJB tester work, but my code can't find the helper class? I know my JNDI path is correct. I've checked to make sure that the EisBc.common.ejb.EisBcModuleHomeHelper class actually exists in the database and is valid. I've run java2perm.sql to grant permissions to my user. And, my java_pool_size is over 60MB.
This is frustrating. Did I see a thread about someone wanting to go back to VB...

Problem with EJB and JMS - Failed to obtain/create connection

hello ejb and jms programmers,
My problem is my topic MDB keep on retrieving the same message when there is a database connection failure. Maybe somebody could help me how to prevent to retrieve the same data?
Given:
- I purposedly turn off the pointbase database because im testing my error handling.
- Im using SJSAS 8 as my application server.
- My message Driven Bean of topic type.
- Im using CMP for my entity bean
Here is the scenario of whats happening - step by step:
1. A separate application publishes a message to JMS queue server
2. My MDB retrieves this message and do some processing then inserts a record (transaction history) in my database
3. But my db is turned off or down
4. My MDB sends a successful processing reply to the JMS queue server
5. Then i noticed that my server.log keeps on growing so when i opened it, the record was not inserted and printed the stacktrace below "RAR5117 : Failed to obtain/create connection. Reason : javax.transaction.SystemException" (complete stacktrace below)
6. I understand the cause of the stacktrace is because the DB is turned off. But what i dont understand is that my MDB keeps on reading the same message. Since my MDB is of topic type, isnt a topic MDB supposedly reads a message only once???
So my questions are:
1. how do i handle insert database error?
2. how can i stop my MDB from processing the same message?
3. any better suggestions?
Thank you in advance :)
leigh
*** more complete stack trace ***
[#|2005-01-09T15:35:57.097+0800|WARNING|sun-appserver-pe8.0.0_01|javax.enterprise.system.core.transaction|_ThreadID=17;|JTS5041: The resource manager is doing work outside a global transaction
javax.transaction.xa.XAException
     at com.pointbase.xa.xaException.getXAException(Unknown Source)
     at com.pointbase.xa.xaConnectionResource.start(Unknown Source)
     at com.sun.gjc.spi.XAResourceImpl.start(XAResourceImpl.java:162)
[#|2005-01-09T15:35:57.167+0800|SEVERE|sun-appserver-pe8.0.0_01|javax.enterprise.resource.resourceadapter|_ThreadID=17;|RAR5027:Unexpected exception in resource pooling
javax.transaction.SystemException
     at com.sun.jts.jta.TransactionImpl.enlistResource(TransactionImpl.java:185)
     at com.sun.enterprise.distributedtx.J2EETransaction.enlistResource(J2EETransaction.java:360)
     at com.sun.enterprise.distributedtx.J2EETransactionManagerImpl.enlistResource(J2EETransactionManagerImpl.java:303)
     at com.sun.enterprise.distributedtx.J2EETransactionManagerOpt.enlistResource(J2EETransactionManagerOpt.java:115)
[#|2005-01-09T15:35:57.177+0800|WARNING|sun-appserver-pe8.0.0_01|javax.enterprise.resource.resourceadapter|_ThreadID=17;|RAR5117 : Failed to obtain/create connection. Reason : javax.transaction.SystemException|#]
[#|2005-01-09T15:35:57.227+0800|WARNING|sun-appserver-pe8.0.0_01|javax.enterprise.resource.resourceadapter|_ThreadID=17;|RAR5114 : Error allocating connection : [Error in allocating a connection. Cause: javax.transaction.SystemException]|#]
[#|2005-01-09T15:35:57.237+0800|SEVERE|sun-appserver-pe8.0.0_01|javax.enterprise.system.container.ejb|_ThreadID=17;|EJB5071: Some remote or transactional roll back exception occurred
com.sun.jdo.api.persistence.support.JDODataStoreException: JDO77006: SQL exception: state = null, error code = 0.
NestedException: java.sql.SQLException: Error in allocating a connection. Cause: javax.transaction.SystemException
FailedObjectArray: [[email protected]5ac]
     at com.sun.jdo.spi.persistence.support.sqlstore.impl.TransactionImpl.getConnectionInternal(TransactionImpl.java:1444)
     at com.sun.jdo.spi.persistence.support.sqlstore.impl.TransactionImpl.getConnection(TransactionImpl.java:1339)

Hi annie,
Wherever you are handling database transactions,
you'd not be able to create a Connection if database
is closed (I think you mentioned turning off the
database) then at this condition, you should
certainly throw a System level exception and stop all
processing with some meaningful flow to indicate a
failure (like display message on UI). Even
network problems are handled by exceptions... so I
don't see a reason why you didn't wrap it in the
first place.
Anyway, try handling specific exceptions rather than
the general Exception... this will give you a better
idea of what to do in case of an exception.Yes i know this. I am practicing this in my non-j2ee server applications. But the j2ee app im making, i just pass the db url in the descriptor and the app server automatically creates the connection for my app. So where would i put exception handling?
2. how can i stop my MDB from processing the same
message?Guaranteed delivery is not supposed to stop
processing. It will continue to process the message
after certain intervals till the message is
delivered. You shouldn't deliver it at all, if you
are able to detect that the database is off
The problem here is that my MDB automatically retrieves the message from the JMS queue server. Im not the one retrieving the messages manually.
My assumed behavior of topic MDB is once the a certain MDB retrieves a message it will not retrieve the same message anymore.
thank you in advance.
leigh

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