isSameRM-override-value in JBoss 5

[csr1978]

Hi,

what does the property value for <isSameRM-override-value> in -ds.xml signify?
Is it mandatory to set it to false when working with Oracle XA database?

Thanks,

[peterj]

According to docs/dtd/jboss-ds_5_0.dtd:

The isSameRM-override-value element allows one to unconditionally set
whether the javax.transaction.xa.XAResource.isSameRM(XAResource) returns
true or false.

According to the javadoc for javax.transaction.xa.XAResource.isSameRM:

This method is called to determine if the resource manager instance
represented by the target object is the same as the resouce manager instance
represented by the parameter xares.

Parameters:
xares - An XAResource object whose resource manager instance is to be
compared with the resource manager instance of the target object.
Returns:
true if it's the same RM instance; otherwise false.

And then there is this wiki entry: http://jboss.org/community/docs/DOC-10013

[csr1978]

Peter,

I am using JBoss 5 with Oracle 9i. When i am trying to persist an object with XA datasource to database i get this exception:

Caused by: org.jboss.util.NestedSQLException: Could not enlist in transaction on entering meta-aware object!;

What would be the possible reasons for this exception.

[peterj]

I don't know. I has been years since I ran Oracle, and I do not use XA. Perhaps another forum denizen can offer some insight.

[cedneve]

Hello,

We had the same error with an XAER_NOTA using DB2 v9.5. Adding that configuration line in the deployment descriptor fixed the issue.

Best regards,
Cedric