Using the current version of persistence.xml leads to an error:
<?xml version="1.0" encoding="UTF-8" ?> <!--<persistence 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" version="1.0">--> <!-- ObjectDB doesn't seem to like version 2.x persitence.xml schema .. --> <persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd"> <!-- in-memory persistence unit for fast performance and minimal dependencies --> <persistence-unit name="TEST_PU" transaction-type="RESOURCE_LOCAL"> <provider>com.objectdb.jpa.Provider</provider> <properties> <property name="javax.persistence.jdbc.url" value="$objectdb/db/vsp.odb"/> <property name="javax.persistence.jdbc.user" value="admin"/> <property name="javax.persistence.jdbc.password" value="admin"/> </properties> </persistence-unit> </persistence> org.xml.sax.SAXParseException; lineNumber: 10; columnNumber: 135; cvc-elt.1: Cannot find the declaration of element 'persistence'. at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:203) at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:134) at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:437) at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:368) at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:325) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleStartElement(XMLSchemaValidator.java:1906) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.startElement(XMLSchemaValidator.java:746) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:378) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootElementHook(XMLNSDocumentScannerImpl.java:604) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:3122) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:880) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:117) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777) at com.sun.org.apache.xerces.internal.jaxp.validation.StreamValidatorHelper.validate(StreamValidatorHelper.java:155) at com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorImpl.validate(ValidatorImpl.java:116) at javax.xml.validation.Validator.validate(Validator.java:124) at com.objectdb.o.XMD.n(XMD.java:208) at com.objectdb.o.XMD.k(XMD.java:155) at com.objectdb.o.UNM$z._e(UNM.java:182) at com.objectdb.o.UNM$z.<init>(UNM.java:169) at com.objectdb.o.UNM.x(UNM.java:105) at com.objectdb.o.UNM.w(UNM.java:75) at com.objectdb.jpa.Provider.createEntityManagerFactory(Provider.java:58) at com.objectdb.jpa.Provider.createEntityManagerFactory(Provider.java:32) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54)
but reverting to version 1.0 makes the error go away.