[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-2604) Isolator.JdbcDelegate masks the exception if it isn't possible to open a connection.

[Tushar Pokle (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-2604?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_26904 ] 

Tushar Pokle commented on HHH-2604:
-----------------------------------

I believe this is the same problem that the following poster encountered:

http://mail-archives.apache.org/mod_mbox/db-derby-user/200603.mbox/%3C031020061621.14665.4411A7810007B67200003949220702105398980B9A01040C0C030A0C0E@comcast.net%3E

>From acemcclou... at comcast.net 
Subject Null Pointer Exception 
Date Fri, 10 Mar 2006 16:21:21 GMT 
I am getting the stack trace shown below. Could someone provide a clue as to what I'm doing
wrong?

Thank you,

Ace
-----------------------------------------------------------------------------------------
java.lang.NullPointerException
	at org.hibernate.jdbc.AbstractBatcher.closeConnection(AbstractBatcher.java:462)
	at org.hibernate.engine.TransactionHelper.doWorkInNewTransaction(TransactionHelper.java:128)
	at org.hibernate.id.TableGenerator.generate(TableGenerator.java:94)
	at org.hibernate.id.TableHiLoGenerator.generate(TableHiLoGenerator.java:61)
	at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:85)
	at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:184)
	at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
	at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:173)
	at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
	at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:69)
	at org.hibernate.impl.SessionImpl.save(SessionImpl.java:481)
	at org.hibernate.impl.SessionImpl.save(SessionImpl.java:476)
        at <some code of mine that calls save with an object>

 


> Isolator.JdbcDelegate masks the exception if it isn't possible to open a connection.
> ------------------------------------------------------------------------------------
>
>                 Key: HHH-2604
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2604
>             Project: Hibernate3
>          Issue Type: Bug
>    Affects Versions: 3.2.4
>         Environment: Hibernate 3.2.2ga
>            Reporter: Tushar Pokle
>            Priority: Minor
>
> A defect in Isolator.JdbcDelegate makes it throw the wrong exception - a NullPointerException -  that masks the true exception. In my case it was an UnsupportedOperationException("The user must supply a JDBC connection").
> The trouble is at the start of Isolator.JdbcDelegate.delegateWork(...):
> {code}
> 174		public void delegateWork(IsolatedWork work, boolean transacted) throws HibernateException {
> 175			Connection connection = null;
> 176			boolean wasAutoCommit = false;
> 177			try {
> 178				connection = session.getBatcher().openConnection();
> {code}
> If there is a failure opening a connection on line 178, the finally clause is executed. The finally clause needs the connection, which of course is null :-)

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