Hi,

I am using the Hibernate Configuration and whenever I create an object of the configuration in my Java code i get the following error:

%%%% Error Creating HibernateSessionFactory %%%%

java.lang.NullPointerException

at de.laliluna.example2.InitSessionFactory.initSessionFactory(InitSessio

nFactory.java:51)

at de.laliluna.example2.InitSessionFactory.getInstance(InitSessionFactor

y.java:33)

at de.laliluna.example.TestClient.main(TestClient.java:45)

Could not initialize the Hibernate configuration

Exception in thread "main" java.lang.NullPointerException

at de.laliluna.example.TestClient.main(TestClient.java:67)

Please guide where I am wrong

well, it appears you have an exception in the TestClient class on line 67. Thats about all I can tell you from what you've provided.

Perhaps the source code, the config.xml file, maybe more of the log files would help.

Line 67 is
org.hibernate.cfg.Configuration cfg = new org.hibernate.cfg.Configuration();

post your config.xml

<?xml version='1.0' encoding='utf-8'?>

<!DOCTYPE hibernate-configuration SYSTEM "hibernate-configuration-3.0.dtd">


<hibernate-configuration>

<session-factory>

<property name="connection.url">jdbc:db2://au200ewp0549:50000/WESTPAC3</property>
<!-- <property name="connection.datasource">java:/comp/env/jdbc/testhibernate</property> -->
<property name="connection.username">db2admin</property>
<property name="connection.password">db2@westpac</property>
<property name="connection.driver_class">com.ibm.db2.jcc.DB2Driver</property>
<property name="dialect">org.hibernate.dialect.DB2Dialect</property>

<property name="transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>

<!-- thread is the short name for
org.hibernate.context.ThreadLocalSessionContext
and let Hibernate bind the session automatically to the thread -->
<property name="current_session_context_class">thread</property>
<!-- this will show us all sql statements -->
<property name="hibernate.show_sql">true</property>

<!-- mapping files -->
<mapping resource="de/laliluna/example/Appstatus.hbm.xml" />
</session-factory>

</hibernate-configuration>

property name is
hibernate.current_session_context_class

But problem is not with the xml file.
problem is before calling the configure method, when we create the Configuration object.
Configuration cfg = new Configuration();

this line returns NullPointerException

Which jars do you have in your classpath/lib?

oops . forget it then.

All the jars of hibernate package from hibernate.org

the method that caused the null pointer is the first show in the stack trace
then you have to post your
InitSessionFactory.java

but line 51 is the most interresting

Hibernate problem
While executing the simple hibernate example

Error in the line

session.beginTransaction();

Error is "cannot open connection"

Please suggest to solve the problem.

Thanks

Problem at line
Transaction tx = session.beginTransaction();

Cannot open connection
org.hibernate.exception.JDBCConnectionException: Cannot open connection
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.j
ava:74)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelp
er.java:43)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelp
er.java:29)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager
.java:420)
at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.
java:144)
at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:129)
at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:
57)
at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1290
)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.hibernate.context.ThreadLocalSessionContext$TransactionProtection
Wrapper.invoke(ThreadLocalSessionContext.java:301)
at $Proxy0.beginTransaction(Unknown Source)
at de.laliluna.example.TestClient.main(TestClient.java:59)
Caused by: java.sql.SQLException: No suitable driver
at java.sql.DriverManager.getConnection(DriverManager.java:532)
at java.sql.DriverManager.getConnection(DriverManager.java:140)
at org.hibernate.connection.DriverManagerConnectionProvider.getConnectio
n(DriverManagerConnectionProvider.java:110)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager
.java:417)
... 11 more