Attached is the test persistence unit which contains 3 persistence units, each that includes:

{{   <class>com.sun.ts.tests.jpa.common.schema30.Address</class>^M }}
{{   <class>com.sun.ts.tests.jpa.common.schema30.Alias</class>^M }}
{{   <class>com.sun.ts.tests.jpa.common.schema30.Country</class>^M }}
{{   <class>com.sun.ts.tests.jpa.common.schema30.CreditCard</class>^M }}
{{   <class>com.sun.ts.tests.jpa.common.schema30.Customer</class>^M }}
{{   <class>com.sun.ts.tests.jpa.common.schema30.Department</class>^M }}
{{   <class>com.sun.ts.tests.jpa.common.schema30.Employee</class>^M }}
{{   <class>com.sun.ts.tests.jpa.common.schema30.HardwareProduct</class>^M }}
{{   <class>com.sun.ts.tests.jpa.common.schema30.Info</class>^M }}
{{   <class>com.sun.ts.tests.jpa.common.schema30.LineItem</class>^M }}
{{   <class>com.sun.ts.tests.jpa.common.schema30.LineItemException</class>^M }}
{{   <class>com.sun.ts.tests.jpa.common.schema30.Order</class>^M }}
{{   <class>com.sun.ts.tests.jpa.common.schema30.Phone</class>^M }}
{{   <class>com.sun.ts.tests.jpa.common.schema30.Product</class>^M }}
{{   <class>com.sun.ts.tests.jpa.common.schema30.ShelfLife</class>^M }}
{{   <class>com.sun.ts.tests.jpa.common.schema30.SoftwareProduct</class>^M }}
{{   <class>com.sun.ts.tests.jpa.common.schema30.Spouse</class>^M }}
   <class>com.sun.ts.tests.jpa.common.schema30.Trim</class>^M

So we are going to deploy all 3 persistence units at the same time from different threads that are referencing the same classes.