Spring JTA configuration - how to set TransactionManager?

We configure our Spring transaction in Spring config as:

<tx:jta-transaction-manager/>

I gather this means that Spring will automatically discover the underlying JTA implementation. So when we start up JBoss we see these messages while开发者_运维问答 Spring searches:

[JtaTransactionManager] [ ] No JTA TransactionManager found at fallback JNDI location [java:comp/Tran
sactionManager]
javax.naming.NameNotFoundException: TransactionManager not bound
<<Big stack trace>>    
<<More of the same>>

And then eventually see:

[JtaTransactionManager] [ ] JTA TransactionManager found at fallback JNDI location [java:/Transaction
Manager]
[JtaTransactionManager] [ ] Using JTA UserTransaction: org.jboss.tm.usertx.client.ServerVMClientUserT
ransaction@1f78dde

Question is - how can we edit our <tx:jta-transaction-manager/> tag to explicitly configure the java:/Transaction Manager JTA implementation so we avoid all these stack traces in the logs? (I'd prefer not to just change the Log4J logging levels)

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Update: I replaced <tx:jta-transaction-manager/> with the below config and it seems to work.. i'm guessing this is alright?

<bean id="transactionManager" class="org.springframework.transaction.jta.JtaTransactionManager">
    <property name="transactionManagerName" value="java:/TransactionManager"/>
</bean>

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Yes, that's alright. The stack trace you were seeing was also alright: <tx:jta-transaction-manager/> tries to acquire the transaction manager from a number of different standard locations; for every failed JNDI lookup, you'll see the javax.naming.NameNotFoundException.

java:/TransactionManager is where JBoss binds to by default; other servlet containers will default to java:/comp/TransactionManager, which I think is supposed to be the "standard" location for the TM.

From the Spring reference documentation:

For standard scenarios, including WebLogic, WebSphere and OC4J, consider using the convenient <tx:jta-transaction-manager/> configuration element. This will automatically detect the underlying server and choose the best transaction manager available for the platform. This means that you won't have to configure server-specific adapter classes (as discussed in the following sections) explicitly; they will rather be chosen automatically, with the standard JtaTransactionManager as default fallback.

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A common "mistake" is to bundle things like jta.jar and/or jbossall-client.jar in the J2EE component you deploy. Double check please and remove them if this is the case.