Hi, everyone!
hope you people are doing well.

I am new to hibernate. I am trying to simply save an object. I found everything correct. SessionFactory object and session object are created. But I am getting some strage exception as log shown bellow.
Please somebody help me to fix this problem.
==================================================================================
code:

user = new User(userName, fullName, password, emailAddress);
try {
SessionFactory factory = HibernateUtils.getSessionFactory();
System.out.println("session factory created : " + factory);
Session session = factory.openSession();
System.out.println("session created : " + session);
Transaction tx = session.beginTransaction();
System.out.println("Transaction created : " + tx);
session.save(user);
tx.commit();
session.close();
} catch (Exception e) {
// TODO: handle exception
System.out.println("Error occured in addUser method");
e.printStackTrace();
}
==================================================================================
Thank You
Regards
Kuldeep Singh

session factory created : org.hibernate.impl.SessionFactoryImpl@16f361b
session created : org.hibernate.impl.SessionImpl(PersistentContext[entitiesByKey={}] ActionQueue[insertions=[] updates=[] deletions=[] collectionCreations=[] collectionRemovals=[] collectionUpdates=[]])
Mar 30, 2013 10:23:43 PM org.hibernate.util.JDBCExceptionReporter logExceptions
WARNING: SQL Error: 0, SQLState: 08S01
Mar 30, 2013 10:23:43 PM org.hibernate.util.JDBCExceptionReporter logExceptions
SEVERE: Communication link failure: java.io.IOException, underlying cause: Unexpected end of input stream

** BEGIN NESTED EXCEPTION **

java.io.IOException
MESSAGE: Unexpected end of input stream

STACKTRACE:

java.io.IOException: Unexpected end of input stream
at com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:1096)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:626)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:1562)
at com.mysql.jdbc.Connection.<init>(Connection.java:491)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:346)
at java.sql.DriverManager.getConnection(DriverManager.java:579)
at java.sql.DriverManager.getConnection(DriverManager.java:190)
at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:110)
at org.hibernate.jdbc.AbstractBatcher.openConnection(AbstractBatcher.java:410)
at org.hibernate.jdbc.JDBCContext.connect(JDBCContext.java:141)
at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:88)
at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:49)
at org.hibernate.transaction.JDBCTransactionFactory.beginTransaction(JDBCTransactionFactory.java:19)
at org.hibernate.jdbc.JDBCContext.beginTransaction(JDBCContext.java:204)
at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1014)
at appUtils.UserUpdates.addUser(UserUpdates.java:60)
at appUtils.UserUpdates.main(UserUpdates.java:43)


** END NESTED EXCEPTION **


Error occured in addUser method
User with 0 is added to databaseorg.hibernate.exception.GenericJDBCException: Cannot open connection
at org.hibernate.exception.ErrorCodeConverter.handledNonSpecificException(ErrorCodeConverter.java:92)
at org.hibernate.exception.ErrorCodeConverter.convert(ErrorCodeConverter.java:80)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29)
at org.hibernate.jdbc.AbstractBatcher.openConnection(AbstractBatcher.java:413)
at org.hibernate.jdbc.JDBCContext.connect(JDBCContext.java:141)
at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:88)
at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:49)
at org.hibernate.transaction.JDBCTransactionFactory.beginTransaction(JDBCTransactionFactory.java:19)
at org.hibernate.jdbc.JDBCContext.beginTransaction(JDBCContext.java:204)
at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1014)
at appUtils.UserUpdates.addUser(UserUpdates.java:60)
at appUtils.UserUpdates.main(UserUpdates.java:43)
Caused by: java.sql.SQLException: Communication link failure: java.io.IOException, underlying cause: Unexpected end of input stream

** BEGIN NESTED EXCEPTION **

java.io.IOException
MESSAGE: Unexpected end of input stream

STACKTRACE:

java.io.IOException: Unexpected end of input stream
at com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:1096)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:626)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:1562)
at com.mysql.jdbc.Connection.<init>(Connection.java:491)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:346)
at java.sql.DriverManager.getConnection(DriverManager.java:579)
at java.sql.DriverManager.getConnection(DriverManager.java:190)
at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:110)
at org.hibernate.jdbc.AbstractBatcher.openConnection(AbstractBatcher.java:410)
at org.hibernate.jdbc.JDBCContext.connect(JDBCContext.java:141)
at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:88)
at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:49)
at org.hibernate.transaction.JDBCTransactionFactory.beginTransaction(JDBCTransactionFactory.java:19)
at org.hibernate.jdbc.JDBCContext.beginTransaction(JDBCContext.java:204)
at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1014)
at appUtils.UserUpdates.addUser(UserUpdates.java:60)
at appUtils.UserUpdates.main(UserUpdates.java:43)


** END NESTED EXCEPTION **


at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:699)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:1562)
at com.mysql.jdbc.Connection.<init>(Connection.java:491)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:346)
at java.sql.DriverManager.getConnection(DriverManager.java:579)
at java.sql.DriverManager.getConnection(DriverManager.java:190)
at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:110)
at org.hibernate.jdbc.AbstractBatcher.openConnection(AbstractBatcher.java:410)
... 8 more