问题
Guys I’m struggling with this one. I am trying to redirect logging from systemout. to a log4j rollingappender file with no success, below is a sample of my persistent.xml
<?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">
<persistence-unit name="R_TEST" transaction-type="RESOURCE_LOCAL">
<provider>
com.ibm.websphere.persistence.PersistenceProviderImpl
</provider>
<non-jta-data-source>jdbc/TESTDB</non-jta-data-source>
<class>com.ra.WSProcess</class>
<property name="openjpa.jdbc.Schema" value="TEST" />
<property name="openjpa.Log" value="log4j"/>
</properties>
</persistence-unit>
I get the following error as soon as I add this: to the file above. I have tried copying these two files (commons-logging-1.1.jar, log4j-1.2.6.jar) into WEB_INF/lib but didnt fx the problem. Doesnt seem to be much on the web on how to get this working as is. Any ideas ?
Please note that I can not change the classloading policy in Websphere as this would stop my app from working
java.lang.NoClassDefFoundError
java.lang.NoClassDefFoundError: org.apache.log4j.Priority
at java.lang.J9VMInternals.verifyImpl(Native Method)
at java.lang.J9VMInternals.verify(J9VMInternals.java:72)
at java.lang.J9VMInternals.initialize(J9VMInternals.java:134)
at org.apache.openjpa.lib.log.Log4JLogFactory.newLogAdapter(Log4JLogFactory.java:33)
at org.apache.openjpa.lib.log.LogFactoryAdapter.getLog(LogFactoryAdapter.java:40)
at org.apache.openjpa.lib.conf.ConfigurationImpl.getLog(ConfigurationImpl.java:223)
at org.apache.openjpa.conf.OpenJPAConfigurationImpl.getConfigurationLog(OpenJPAConfigurationImpl.java:1445)
at org.apache.openjpa.persistence.PersistenceProductDerivation$ConfigurationProviderImpl.setInto(PersistenceProductDerivation.java:479)
at com.ibm.ws.persistence.jdbc.kernel.WsJpaJDBCBrokerFactory.newInstance(WsJpaJDBCBrokerFactory.java:121)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:45)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
at java.lang.reflect.Method.invoke(Method.java:599)
at org.apache.openjpa.kernel.Bootstrap.invokeFactory(Bootstrap.java:124)
at org.apache.openjpa.kernel.Bootstrap.newBrokerFactory(Bootstrap.java:62)
at org.apache.openjpa.persistence.PersistenceProviderImpl.getBrokerFactory(PersistenceProviderImpl.java:102)
at org.apache.openjpa.persistence.PersistenceProviderImpl.createEntityManagerFactory(PersistenceProviderImpl.java:81)
at com.ibm.websphere.persistence.PersistenceProviderImpl.createEntityManagerFactory(PersistenceProviderImpl.java:71)
at com.ibm.websphere.persistence.PersistenceProviderImpl.createEntityManagerFactory(PersistenceProviderImpl.java:41)
at org.apache.openjpa.persistence.PersistenceProviderImpl.createEntityManagerFactory(PersistenceProviderImpl.java:109)
at org.apache.openjpa.persistence.PersistenceProviderImpl.createEntityManagerFactory(PersistenceProviderImpl.java:53)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:110)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83)
at com.ra.WSProcess.EntityManagerHelper.<clinit>(EntityManagerHelper.java:20)
at java.lang.J9VMInternals.initializeImpl(Native Method)
at java.lang.J9VMInternals.initialize(J9VMInternals.java:200)
at com.ra.WSProcess.process(WSProcess.java:129)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:45)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
at java.lang.reflect.Method.invoke(Method.java:599)
at org.apache.axis2.jaxws.server.dispatcher.JavaDispatcher.invokeTargetOperation(JavaDispatcher.java:76)
at org.apache.axis2.jaxws.server.dispatcher.JavaBeanDispatcher.invoke(JavaBeanDispatcher.java:96)
at org.apache.axis2.jaxws.server.EndpointController.invoke(EndpointController.java:108)
at org.apache.axis2.jaxws.server.JAXWSMessageReceiver.receive(JAXWSMessageReceiver.java:159)
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:182)
at org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:275)
at com.ibm.ws.websvcs.transport.http.WASAxis2Servlet.doPost(WASAxis2Servlet.java:1330)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:738)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1443)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:790)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:443)
at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:175)
at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:91)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:859)
at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1557)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:173)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:455)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:384)
at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:83)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:202)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:766)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:896)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1527)
Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Priority
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:402)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:347)
回答1:
The openjpa.Log property value of log4j cannot work with the built-in IBM PersistenceProviderImpl because the built-in JPA provider does not have class loader visibility to your application JARs, and there is no class loader configuration option to make that work. The only option is to download OpenJPA yourself and configure it as a third-party persistence provider.
来源：https://stackoverflow.com/questions/10254857/openjpa-webspere-7-log4j-configuration