Unable to create new rows

Question

I recently switched from iPlanet webserver to Oracle 9iAS 9.0.2. With the migration I changed my code to use sessions.xml to read the datasource value. Now I can read and update existing data but cannot insert new rows. Below is the snippet of code I am using.
public void init() {
Session session = SessionManager.getManager().getSession("MODEL");
Project project = session.getProject();
AuditListener.addListeners(project);
DatabaseLogin login = project.getLogin();
login.setUsesStreamsForBinding(true);
project.setLogin(login);
SessionListener.addListener(session);
((DatabaseSession)session).login(); //using this to fire preLogin event
public static Session getSession() {
Session session = SessionManager.getManager().getSession("MODEL");
((DatabaseSession)session).login(); //doesn't work with or without this.
return session;
The error I get is
EXCEPTION [TOPLINK-4005] (TopLink - 9.0.3 (Build 423)): oracle.toplink.exceptions.DatabaseException
EXCEPTION DESCRIPTION: DatabaseAccessor not connected.
     at oracle.toplink.exceptions.DatabaseException.databaseAccessorNotConnected(Unknown Source)
     at oracle.toplink.internal.databaseaccess.DatabaseAccessor.incrementCallCount(Unknown Source)
     at oracle.toplink.internal.databaseaccess.DatabaseAccessor.executeCall(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.executeCall(Unknown Source)
     at oracle.toplink.internal.queryframework.CallQueryMechanism.executeCall(Unknown Source)
     at oracle.toplink.internal.queryframework.CallQueryMechanism.executeCall(Unknown Source)
     at oracle.toplink.internal.queryframework.CallQueryMechanism.executeSelectCall(Unknown Source)
     at oracle.toplink.internal.queryframework.CallQueryMechanism.executeSelect(Unknown Source)
     at oracle.toplink.queryframework.DataReadQuery.executeNonCursor(Unknown Source)
     at oracle.toplink.queryframework.DataReadQuery.execute(Unknown Source)
     at oracle.toplink.queryframework.DatabaseQuery.execute(Unknown Source)
     at oracle.toplink.queryframework.ReadQuery.execute(Unknown Source)
     at oracle.toplink.publicinterface.Session.internalExecuteQuery(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.internalExecuteQuery(Unknown Source)
     at oracle.toplink.publicinterface.Session.executeQuery(Unknown Source)
     at oracle.toplink.publicinterface.Session.executeQuery(Unknown Source)
     at oracle.toplink.internal.databaseaccess.OraclePlatform.nativeGetNextBatchOfSequenceNumbersNamed(Unknown Source)
     at oracle.toplink.internal.databaseaccess.OraclePlatform.nativeGetSequenceNumberNamed(Unknown Source)
     at oracle.toplink.internal.databaseaccess.DatabasePlatform.getSequenceNumberNamed(Unknown Source)
     at oracle.toplink.publicinterface.Session.getNextSequenceNumberValue(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.getNextSequenceNumberValue(Unknown Source)
     at oracle.toplink.internal.descriptors.ObjectBuilder.assignSequenceNumber(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.assignSequenceNumbers(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.collectAndPrepareObjectsForCommit(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.commitToDatabase(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.commitRootUnitOfWork(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.commit(Unknown Source)
Any help would be highly appreciated.
Thanks,
Rajiv

Answer 1

I recently switched from iPlanet webserver to Oracle 9iAS 9.0.2. With the migration I changed my code to use sessions.xml to read the datasource value. Now I can read and update existing data but cannot insert new rows. Below is the snippet of code I am using.
public void init() {
Session session = SessionManager.getManager().getSession("MODEL");
Project project = session.getProject();
AuditListener.addListeners(project);
DatabaseLogin login = project.getLogin();
login.setUsesStreamsForBinding(true);
project.setLogin(login);
SessionListener.addListener(session);
((DatabaseSession)session).login(); //using this to fire preLogin event
public static Session getSession() {
Session session = SessionManager.getManager().getSession("MODEL");
((DatabaseSession)session).login(); //doesn't work with or without this.
return session;
}The SessionManager.getSession(java.lang.String) method returns a Session which is already logged in. If you want it to return a Session that you will log in yourself, then you should use an alternate version of getSession(XMLLoader,String,ClassLoader,boolean,boolean). The first boolean argument should be set to false to indicate that the Session should be return without having been logged in.
The login alterations you're making above are being done to a Session which is already logged in.
The Exception below is not sufficient to diagnose the problem. After commiting your UnitOfWork, TopLink has determined that some Objects need to be inserted and that these Objects need to be sequenced. The query which is fetching the next sequence number is throwing this Exception (because TopLink Database Connections seem not to be initialized correctly)
However, the reason the DatabaseAccessor is not connected should be contained in an earlier Exception. You may still be able to read because the ReadPool initialized okay. But when it comes time to fetch a new sequence number, the Connection responsible for that must have not initialized properly.
JIM
The error I get is
EXCEPTION [TOPLINK-4005] (TopLink - 9.0.3 (Build 423)): oracle.toplink.exceptions.DatabaseException
EXCEPTION DESCRIPTION: DatabaseAccessor not connected.
     at oracle.toplink.exceptions.DatabaseException.databaseAccessorNotConnected(Unknown Source)
     at oracle.toplink.internal.databaseaccess.DatabaseAccessor.incrementCallCount(Unknown Source)
     at oracle.toplink.internal.databaseaccess.DatabaseAccessor.executeCall(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.executeCall(Unknown Source)
     at oracle.toplink.internal.queryframework.CallQueryMechanism.executeCall(Unknown Source)
     at oracle.toplink.internal.queryframework.CallQueryMechanism.executeCall(Unknown Source)
     at oracle.toplink.internal.queryframework.CallQueryMechanism.executeSelectCall(Unknown Source)
     at oracle.toplink.internal.queryframework.CallQueryMechanism.executeSelect(Unknown Source)
     at oracle.toplink.queryframework.DataReadQuery.executeNonCursor(Unknown Source)
     at oracle.toplink.queryframework.DataReadQuery.execute(Unknown Source)
     at oracle.toplink.queryframework.DatabaseQuery.execute(Unknown Source)
     at oracle.toplink.queryframework.ReadQuery.execute(Unknown Source)
     at oracle.toplink.publicinterface.Session.internalExecuteQuery(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.internalExecuteQuery(Unknown Source)
     at oracle.toplink.publicinterface.Session.executeQuery(Unknown Source)
     at oracle.toplink.publicinterface.Session.executeQuery(Unknown Source)
     at oracle.toplink.internal.databaseaccess.OraclePlatform.nativeGetNextBatchOfSequenceNumbersNamed(Unknown Source)
     at oracle.toplink.internal.databaseaccess.OraclePlatform.nativeGetSequenceNumberNamed(Unknown Source)
     at oracle.toplink.internal.databaseaccess.DatabasePlatform.getSequenceNumberNamed(Unknown Source)
     at oracle.toplink.publicinterface.Session.getNextSequenceNumberValue(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.getNextSequenceNumberValue(Unknown Source)
     at oracle.toplink.internal.descriptors.ObjectBuilder.assignSequenceNumber(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.assignSequenceNumbers(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.collectAndPrepareObjectsForCommit(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.commitToDatabase(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.commitRootUnitOfWork(Unknown Source)
     at oracle.toplink.publicinterface.UnitOfWork.commit(Unknown Source)
Any help would be highly appreciated.
Thanks,
Rajiv