Your persistence.xml mentions the datasource name:
anonymous wrote : <jta-data-source>java:/cuoreds</jta-data-source>
This means that the application will be using the persistence manager to persist to a
database being pointed to by the datasource. The datasource is configured separately. Each
application server has its own way of configuring datasource. JBoss uses xml files through
which you can configure datasource. You have to create a file who's name ends with
-ds.xml and place this file in the deploy folder of JBoss. Example datasource files can be
found in %JBOSS_HOME%\docs\examples\jca folder. See this for more details for configuring
the datasource
http://wiki.jboss.org/wiki/ConfigDataSources
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