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https://issues.apache.org/jira/browse/OPENJPA-2184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13283777#comment-13283777
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Lucas Smith commented on OPENJPA-2184:
--------------------------------------
I am using JRE1.7 for running the program. Is it connected with Java version?
Can you describe me that problem?
> Exception when <exclude-unlisted-classes> element is used within
> persistence.xml
> --------------------------------------------------------------------------------
>
> Key: OPENJPA-2184
> URL: https://issues.apache.org/jira/browse/OPENJPA-2184
> Project: OpenJPA
> Issue Type: Bug
> Components: jpa
> Affects Versions: 2.2.0
> Environment: JavaSE
> Reporter: Lucas Smith
>
> Here is my persistence.xml content:
> <?xml version="1.0" encoding="UTF-8"?>
> <persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence";
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
> xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
> http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd";>
> <persistence-unit name="derbyPU" transaction-type="RESOURCE_LOCAL">
>
> <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
> <exclude-unlisted-classes>false</exclude-unlisted-classes>
> <properties>
> <property name="openjpa.ConnectionDriverName"
> value="org.apache.derby.jdbc.ClientDriver" />
> <property name="openjpa.ConnectionURL"
> value="jdbc:derby://localhost:1527/hibernate;create=true" />
> <property name="openjpa.ConnectionUserName" value="hibernate" />
> <property name="openjpa.ConnectionPassword" value="hibernate" />
> <property name="openjpa.jdbc.SynchronizeMappings"
> value="buildSchema(SchemaAction='drop,add,deleteTableContents',IgnoreErrors=true)"
> />
> <property name="openjpa.Log" value="DefaultLevel=WARN,SQL=TRACE" />
> <property name="openjpa.jdbc.DBDictionary"
> value="derby(NextSequenceQuery=VALUES NEXT VALUE FOR {0})"/>
> </properties>
> </persistence-unit>
> </persistence>
> Such configuration produses the following exception:
> Exception in thread "main" java.lang.LinkageError: loader (instance of
> sun/misc/Launcher$AppClassLoader): attempted duplicate class definition for
> name: "org/apache/openjpa/jdbc/identifier/DBIdentifier$DBIdentifierType"
> at java.lang.ClassLoader.defineClass1(Native Method)
> at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
> at
> java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
> at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
> at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
> at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
> at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
> at
> org.apache.openjpa.jdbc.sql.DBDictionary.configureNamingRules(DBDictionary.java:506)
> at
> org.apache.openjpa.jdbc.sql.DBDictionary.setConfiguration(DBDictionary.java:4633)
> at
> org.apache.openjpa.lib.conf.Configurations.configureInstance(Configurations.java:486)
> at
> org.apache.openjpa.lib.conf.Configurations.configureInstance(Configurations.java:443)
> at
> org.apache.openjpa.jdbc.sql.DBDictionaryFactory.newDBDictionary(DBDictionaryFactory.java:199)
> at
> org.apache.openjpa.jdbc.sql.DBDictionaryFactory.newDBDictionary(DBDictionaryFactory.java:66)
> at
> org.apache.openjpa.jdbc.conf.JDBCConfigurationImpl.getDBDictionaryInstance(JDBCConfigurationImpl.java:579)
> at
> org.apache.openjpa.jdbc.meta.MappingRepository.endConfiguration(MappingRepository.java:1510)
> at
> org.apache.openjpa.lib.conf.Configurations.configureInstance(Configurations.java:518)
> at
> org.apache.openjpa.lib.conf.Configurations.configureInstance(Configurations.java:443)
> at
> org.apache.openjpa.lib.conf.PluginValue.instantiate(PluginValue.java:104)
> at
> org.apache.openjpa.conf.MetaDataRepositoryValue.instantiate(MetaDataRepositoryValue.java:68)
> at
> org.apache.openjpa.lib.conf.ObjectValue.instantiate(ObjectValue.java:83)
> at
> org.apache.openjpa.conf.OpenJPAConfigurationImpl.newMetaDataRepositoryInstance(OpenJPAConfigurationImpl.java:968)
> at
> org.apache.openjpa.conf.OpenJPAConfigurationImpl.getMetaDataRepositoryInstance(OpenJPAConfigurationImpl.java:959)
> at
> org.apache.openjpa.kernel.AbstractBrokerFactory.makeReadOnly(AbstractBrokerFactory.java:638)
> at
> org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:203)
> at
> org.apache.openjpa.kernel.DelegatingBrokerFactory.newBroker(DelegatingBrokerFactory.java:156)
> at
> org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:227)
> at
> org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:154)
> at
> org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:60)
> I have already used java 5, 6 and 7 compilers. They all give the same
> exception.
> However, when I delete
> <exclude-unlisted-classes>false</exclude-unlisted-classes> element and
> declare classes explicitly (using <class> elements) everything works like a
> charm.
> I am using Open JPA in Java SE environment. I have 'openjpa-all-2.2.0.jar' in
> my class and build paths.
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