[jboss-user] [Persistence, JBoss/CMP, Hibernate, Database] Probem with the same name for persistence unit with separate wars in JBOSS 5.1.0

[Alexander Vaysberg]

Hi,

I have a problem with 2 wars (a.war and b.war), which have the 
persistence jar with persistence.xml. The persistence xml for both jars 
has persistence unit with same name <persistence-unit name=/"default"… 
/(The Datasource for each persistence unit aren’t the same). But if I 
deploy on the JBOSS AS 5.1.0 the both war, only the first war deploy on 
the second I have a problem (Exception):

2010-10-01 09:51:26,477 ERROR 
[org.jboss.kernel.plugins.dependency.AbstractKernelController] (main) 
Error installing to Real: 
name=vfszip:/usr/local/jboss-5.1.0.GA-jdk5/server/rb_std_dev/deploy/b.war
/ state=PreReal mode=Manual requiredState=Real
org.jboss.deployers.spi.DeploymentException: Error deploying: 
persistence.unit:unitName=#default
at 
org.jboss.deployers.spi.DeploymentException.rethrowAsDeploymentException(DeploymentException.java:49)
at 
org.jboss.deployers.vfs.deployer.kernel.BeanMetaDataDeployer.deploy(BeanMetaDataDeployer.java:125)
at 
org.jboss.deployers.vfs.deployer.kernel.BeanMetaDataDeployer.deploy(BeanMetaDataDeployer.java:51)
at 
org.jboss.deployers.spi.deployer.helpers.AbstractSimpleRealDeployer.internalDeploy(AbstractSimpleRealDeployer.java:62)
at 
org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy(AbstractRealDeployer.java:50)
at 
org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:171)
at 
org.jboss.deployers.plugins.deployers.DeployersImpl.doDeploy(DeployersImpl.java:1439)
at 
org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1157)
at 
org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1178)
at 
org.jboss.deployers.plugins.deployers.DeployersImpl.install(DeployersImpl.java:1098)
at 
org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)

In SPEC for EJB 3.0 I have read:

“*6.2.2 Persistence Unit Scope*

…
When referencing a persistence unit using the unitName annotation 
element or persistence-
unit-name deployment descriptor element, the visibility scope of the 
persistence unit is
determined by its point of definition. A persistence unit that is 
defined at the level of an EJB-JAR,WAR,
or application client jar is scoped to that EJB-JAR, WAR, or application 
jar respectively and is visible to
the components defined in that jar or war…”

What is wrong?