eclipselink PersistenceUnitLoadingEception in executable JAR

Question

I am developing a stand-alone java application which uses eclipselink. It is all fine when I execute the app from eclipse IDE. But I've exported an executable JAR file, and since than I can not make eclipseLink work. I have found similar issue in the Eclipse community forum here, but yet not too handy:

Please help,

My exception is the following:

01 dec. 2010 22:47:31,199  INFO Configuration:97 - Iniciate database
Exception in thread "main" java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoa
der.java:56)
Caused by: Exception [EclipseLink-30005] (Eclipse Persistence Services - 2.0.2.v
20100323-r6872): org.eclipse.persistence.exceptions.PersistenceUnitLoadingExcept
ion
Exception Description: An exception was thrown while searching for persistence a
rchives with ClassLoader: java.net.URLClassLoader@61de33
Internal Exception: Exception [EclipseLink-30004] (Eclipse Persistence Services
- 2.0.2.v20100323-r6872): org.eclipse.persistence.exceptions.PersistenceUnitLoad
ingExceptionException Description: An exception was thrown while processing persistence.xml
from URL: rsrc:../
Internal Exception: java.net.MalformedURLException
        at org.eclipse.persistence.exceptions.PersistenceUnitLoadingException.ex
ceptionSearchingForPersistenceResources(PersistenceUnitLoadingException.java:126
)
        at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFa
ctory(PersistenceProvider.java:133)
        at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFa
ctory(PersistenceProvider.java:65)
        at javax.persistence.Persistence.createEntityManagerFactory(Persistence.
java:51)
        at javax.persistence.Persistence.createEntityManagerFactory(Persistence.
java:33)
        at eu.agilelabs.pillAgent.db.dam.DataManagerImplJPA.(DataManagerIm
plJPA.java:36)
        at eu.agilelabs.pillAgent.db.dam.DataManagerImplJPA.getInstance(DataMana
gerImplJPA.java:47)
        at eu.agilelabs.configuration.Configuration.(Configuration.java:98
)
        at eu.agilelabs.configuration.Configuration.getInstance(Configuration.ja
va:119)
        at eu.agilelabs.pillAgent.core.Main.main(Main.java:15)
        ... 5 more
Caused by: Exception [EclipseLink-30004] (Eclipse Persistence Services - 2.0.2.v
20100323-r6872): org.eclipse.persistence.exceptions.PersistenceUnitLoadingExcept
ion
Exception Description: An exception was thrown while processing persistence.xml
from URL: rsrc:../
Internal Exception: java.net.MalformedURLException
        at org.eclipse.persistence.exceptions.PersistenceUnitLoadingException.ex
ceptionProcessingPersistenceXML(PersistenceUnitLoadingException.java:117)
        at org.eclipse.persistence.internal.jpa.deployment.PersistenceUnitProces
sor.processPersistenceXML(PersistenceUnitProcessor.java:444)
        at org.eclipse.persistence.internal.jpa.deployment.PersistenceUnitProces
sor.processPersistenceArchive(PersistenceUnitProcessor.java:401)
        at org.eclipse.persistence.internal.jpa.deployment.PersistenceUnitProces
sor.getPersistenceUnits(PersistenceUnitProcessor.java:310)
        at org.eclipse.persistence.internal.jpa.deployment.JPAInitializer.findPe
rsistenceUnitInfoInArchive(JPAInitializer.java:149)
        at org.eclipse.persistence.internal.jpa.deployment.JPAInitializer.findPe
rsistenceUnitInfoInArchives(JPAInitializer.java:136)
        at org.eclipse.persistence.internal.jpa.deployment.JPAInitializer.findPe
rsistenceUnitInfo(JPAInitializer.java:125)
        at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFa
ctory(PersistenceProvider.java:98)
        ... 13 more
Caused by: java.net.MalformedURLException
        at java.net.URL.(Unknown Source)
        at java.net.URL.(Unknown Source)
        at java.net.URL.(Unknown Source)
        at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrent
Entity(Unknown Source)
        at com.sun.org.apache.xerces.internal.impl.XMLVersionDetector.determineD
ocVersion(Unknown Source)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(U
nknown Source)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(U
nknown Source)
        at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown So
urce)
        at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Un
known Source)
        at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.p
arse(Unknown Source)
        at org.eclipse.persistence.internal.jpa.deployment.PersistenceUnitProces
sor.processPersistenceXML(PersistenceUnitProcessor.java:442)
        ... 19 more

I think this line must be the key:

Internal Exception: Exception [EclipseLink-30004] (Eclipse Persistence Services
- 2.0.2.v20100323-r6872): org.eclipse.persistence.exceptions.PersistenceUnitLoad
ingExceptionException Description: An exception was thrown while processing persistence.xml
from URL: rsrc:../

Answer 1

I have managed to solve it. I changed the way eclipse exports the jar file. If it extracts required libraries into the jar everything works great. Thank you anyway!