Sunday, January 17, 2010

Unable to deploy JPA to Tomcat (Linux server)

I had to reimage my linux server due to a catastrophic disk failure. In doing so, I had to reinstall tomcat(s) (I use two... one for running my stamp app and the stamp test app (selenium testing) and one for running hudson builds). When my ant script for my stamp application deployed to the "production" tomcat, the start target would fail. I looked in the tomcat logs and saw this:

Exception Description: Predeployment of PersistenceUnit [stamp-test] failed.
Internal Exception: java.lang.RuntimeException: Exception [EclipseLink-7018] (Eclipse Persistence Services - 1.1.2.v20090612-r4475): org.eclipse.persistence.exceptions.ValidationException
Exception Description: File error.
Internal Exception: /etc/rc.d/init.d/tempToDelete.xml (Permission denied)
at org.eclipse.persistence.exceptions.PersistenceUnitLoadingException.exceptionSearchingForPersistenceResources( 
at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(
at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(

This threw my for a loop, until the path where the file was being read/written to tipped me off. I have startup scripts that use the java service daemon (jsvc) which are located in /etc/rc.d/init.d. Sure enough, this was the problem. Essentially eclipselink was trying to create a temporary file while attempting to clone an object when TABLE_PER_CLASS inheritance is being used. The fix turned out to be quite simple. I simply had to perform a change directory prior to calling the jsvc to the $CATALINA_HOME(or wherever your tomcat lives) prior to invoking the jsvc.

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