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Greenhorn
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"When an EJBException (or any RuntimeException type) is thrown by any method in the MDB instance, the instance is immediately removed from memory and the transaction is rolled back."

What is the meaning of the transaction is rolled back?

is he trying to say the message will be sent back to the same Q?
 
ranger
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This simply means that any work that occured processing the message before the exception was thrown will be reverted back to their original values. So if your MDB went to a database and did an update, that would be reverted back in the database, it would not be commited but rolledback.

It does not mean that the message goes back to the Q.

Mark
 
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