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    copied!<p>Having the same problem with OpenJpa 2.2.2.</p> <p>Its something related to the persistence.xml - when I enhance my entities with a persistence.xml configured for HSqlDb then everything works. When I use a persistence.xml configured for MySql Cluster it bombs out with that error. So it seems something in the persistence.xml triggers another path in the code during enhancement that just doesn't work.</p> <p>Will come back and comment if I figure out something useful.</p> <p>My persistence.xml with both configurations</p> <pre><code>&lt;?xml version="1.0"?&gt; &lt;persistence xmlns="http://java.sun.com/xml/ns/persistence" version="2.0"&gt; &lt;persistence-unit name="testdb" transaction-type="RESOURCE_LOCAL"&gt; &lt;provider&gt;org.apache.openjpa.persistence.PersistenceProviderImpl&lt;/provider&gt; &lt;class&gt;code.TestDataBean&lt;/class&gt; &lt;class&gt;code.shared.DataBean&lt;/class&gt; &lt;class&gt;code.shared.AbstractDataBean&lt;/class&gt; &lt;properties&gt; &lt;!-- HSqlDb --&gt; &lt;!-- &lt;property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema" /&gt; &lt;property name="openjpa.ConnectionURL" value="jdbc:hsqldb:testdb" /&gt; &lt;property name="openjpa.ConnectionDriverName" value="org.hsqldb.jdbcDriver" /&gt; &lt;property name="openjpa.ConnectionUserName" value="sa" /&gt; &lt;property name="openjpa.ConnectionPassword" value="" /&gt; &lt;property name="openjpa.Log" value="DefaultLevel=TRACE" /&gt; --&gt; &lt;!-- MySql Cluster port 5000 --&gt; &lt;property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema" /&gt; &lt;property name="openjpa.ConnectionDriverName" value="com.mysql.jdbc.Driver" /&gt; &lt;property name="openjpa.ConnectionURL" value="jdbc:mysql://localhost:5000/clusterdb" /&gt; &lt;property name="openjpa.ConnectionUserName" value="root" /&gt; &lt;property name="openjpa.ConnectionPassword" value="" /&gt; &lt;property name="openjpa.BrokerFactory" value="ndb" /&gt; &lt;property name="openjpa.jdbc.DBDictionary" value="TableType=ndb"/&gt; &lt;property name="openjpa.ndb.connectString" value="localhost:1186" /&gt; &lt;property name="openjpa.ndb.database" value="clusterdb" /&gt; &lt;property name="openjpa.Log" value="DefaultLevel=TRACE" /&gt; &lt;/properties&gt; &lt;/persistence-unit&gt; &lt;/persistence&gt; </code></pre>
 

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