EJB3 - using 2 persistence units within a transaction (Exception: Local transaction already has 1 non-XA Resource)

Question

I am trying to use 2 persistence units within the same transaction in a Java EE application deployed on Glassfish.

The 2 persistence units are defined in persistence.xml

Answer 1

Change configuration of connection pool in Glassfish:

Connection Pool:
Name: BEACHWATER_LIMS
Datasource Classname: com.microsoft.sqlserver.jdbc.SQLServerXADataSource
Resource Type: javax.sql.XADataSource

Follow the steps on Senthil Balakrishnan's blog, "How to make MSSQL Server XA Datasource Work?" here, http://www.senthilb.com/2010/01/how-to-make-xa-datasource-work-in-mssql.html.

Restart Glassfish.