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JDO on Tomcat 4.1.30

Posted on 2004-03-28
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Last Modified: 2010-08-05
Hai,

   I was trying to implement JDO on Tomcat. But was unable to deploy. I don't get any compile time errors or while enhancing, but while executing the program on webserver it throws an exception like,

org.jpox.model.exceptions.XMLMetaDataException: Error in file:/C:/Tomcat/webapps/cpitems/WEB-INF/classes/com/cpi/steps/formDeply.jdo : Specified persistence-capable superclass com.cpi.steps.formBuilder not found
NestedThrowables:
java.lang.ClassNotFoundException: com.cpi.steps.formBuilder
      at org.jpox.model.ClassMetaData.loadClassElement(ClassMetaData.java:525)
      at org.jpox.model.ClassMetaData.loadFrom(ClassMetaData.java:731)
      at org.jpox.model.ClassMetaData.forClass(ClassMetaData.java:342)
      at org.jpox.AbstractPersistenceManager.isPersistenceCapable(AbstractPersistenceManager.java:275)
      at org.jpox.AbstractPersistenceManager.assertPersistenceCapable(AbstractPersistenceManager.java:298)
      at org.jpox.AbstractPersistenceManager.internalMakePersistent(AbstractPersistenceManager.java:690)
      at org.jpox.AbstractPersistenceManager.makePersistent(AbstractPersistenceManager.java:767)
      at com.cpi.steps.FormMailerPersister.doGet(FormMailerPersister.java:48)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
      at org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java:466)
      at org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:180)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2422)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:163)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:199)
      at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:828)
      at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:700)
      at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:584)
      at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
      at java.lang.Thread.run(Thread.java:534)
Caused by: java.lang.ClassNotFoundException: com.cpi.steps.formBuilder
      at org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLoader.java:992)
      at org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLoader.java:857)
      at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
      at java.lang.Class.forName0(Native Method)
      at java.lang.Class.forName(Class.java:141)
      at org.jpox.model.ClassMetaData.loadClassElement(ClassMetaData.java:521)
      ... 42 more
NestedThrowablesStackTrace:
java.lang.ClassNotFoundException: com.cpi.steps.formBuilder
      at org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLoader.java:992)
      at org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLoader.java:857)
      at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
      at java.lang.Class.forName0(Native Method)
      at java.lang.Class.forName(Class.java:141)
      at org.jpox.model.ClassMetaData.loadClassElement(ClassMetaData.java:521)
      at org.jpox.model.ClassMetaData.loadFrom(ClassMetaData.java:731)
      at org.jpox.model.ClassMetaData.forClass(ClassMetaData.java:342)
      at org.jpox.AbstractPersistenceManager.isPersistenceCapable(AbstractPersistenceManager.java:275)
      at org.jpox.AbstractPersistenceManager.assertPersistenceCapable(AbstractPersistenceManager.java:298)
      at org.jpox.AbstractPersistenceManager.internalMakePersistent(AbstractPersistenceManager.java:690)
      at org.jpox.AbstractPersistenceManager.makePersistent(AbstractPersistenceManager.java:767)
      at com.cpi.steps.FormMailerPersister.doGet(FormMailerPersister.java:48)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
      at org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java:466)
      at org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:180)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2422)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:163)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:199)
      at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:828)
      at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:700)
      at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:584)
      at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
      at java.lang.Thread.run(Thread.java:534)

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Question by:hygriva
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3 Comments
 
LVL 23

Accepted Solution

by:
rama_krishna580 earned 250 total points
ID: 11143314
Hi,

You must check the classloader for the application server.

Create some instances of the classes outside JPOX to check if you have access to the classes.

R.K
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