OC4J Quick Tips

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When I deploy my application to the OC4J container, the deployment fails with the error:  Initialization of bean failed; nested exception is java.lang.NoSuchMethodError: org.objectweb.asm.ClassVisitor.visit(IILjava/lang/String;Ljava/lang/Strin;g[Ljava/lang/String;Ljava/lang/String;)

My build fails whenever MyEclipse tries to deploy my application to my OC4J application server.

ANSWER:

• Build for a project will fail in a MyEclipse environment if there are 2 maven natures/libraries in the .project and. classpath files.  Sometimes MyEclipse will automatically create or configure your .classpath and .project file when you check out a project.  If it adds 2 maven natures (org.maven.ide.eclipse and org.eclipse.m2e ) in your project, you will not be able to build your project.  The build will fail when it tries to deploy the application to the application server.  The logs in the server will shows an error indicating that it is unable to load the applicationContext as it cannot create the daoFoundation bean, sessionFactory bean, and so on as a result of a missing object: Student.
  
  To resolve the problem, remove one of the maven natures/libraries in the project configuration.  It can be done via deleting the maven nature from the Libraries in the Java Build Path of the project as shown in the panel below:
  
  
  
  Also, you can edit the .classpath and .project file manually.  You need to choose either one of the maven nature or classpath entry.  Using the org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER, the following are excerpts of the .classpath and .project files that are configured properly:
  
  
  1. For the .classpath file:

     <?xml version="1.0" encoding="UTF-8"?>
     <classpath>
      <classpathentry kind="src" output="target/classes" path="src/main/java"/>
      <classpathentry kind="src" output="target/classes" path="src/main/resources"/>
      <classpathentry kind="src" output="target/test-classes" path="src/test/java"/>
      <classpathentry kind="src" output="target/test-classes" path="src/test/resources"/>
      <classpathentry kind="con"  path="org.eclipse.jdt.launching.JRE_CONTAINER
          /org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.6"/>
      <classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
        <attributes>
          <attribute name="org.eclipse.jst.component.dependency" value="/WEB-INF/lib"/>
        </attributes>
      </classpathentry>
      <classpathentry kind="output" path="target/classes"/>
     </classpath>
     

  2. for the .project file:

     <buildCommand>
        <name>org.eclipse.m2e.core.maven2Builder</name>
        <arguments>
        </arguments>
     </buildCommand>
     .
     .
     <natures>
       <nature>org.eclipse.m2e.core.maven2Nature</nature>
       .
       .
     </natures>
     

I forgot my OC4J administrator password.  How can I manually reset the password?

ANSWER:

• Open ${ORACLE_HOME}/j2ee/home/config/system-jazn-data.xml with a text editor.
  Find the <user> tag block for oc4jadmin. Change the oc4jadmin's <credentials> property to (substituting your password for myNewPassowd): <credentials>!myNewPassword</credentials>
  Be sure to preface the password with an ! to inidcate that this is a plain text value.
  When completed, the oc4jadmin <user> should look something like:

  <user>
      <name>oc4jadmin</name>
      <display-name>OC4J Administrator</display-name>
      <guid>E33D5A508AA511DF8F573778FB23EDF8</guid>
      <description>OC4J Administrator</description>
      <credentials>!myNewPassword</credentials>
  </user>
  

  Save the changes and restart the OC4J server.

I'm getting an oracle.xml.parser.schema.XSDException when I try to deploy my web application.

QUESTION:

• My laptop was formatted recently, so I installed MyEclipse 10.7.  When I tried to deploy my web application to my local OC4J server, I get the following error.:

  Deploy error: Deploy error: Operation failed with error:
  Line 10 in XML document from URL [code-source:/C:/oc4j_101350/j2ee/home/applications/dfp/dfp/WEB-INF/lib/csf-webservices-1.0.17-20130103.040738-23.jar!/applicationContext-csf-webservices.xml] is invalid; 
  nested exception is oracle.xml.parser.schema.XSDException: Duplicated definition for: 'identifiedType'
  

  I think it’s related to some XML parsers.  I don't think its MyEclipse that is causing the problem.

ANSWER:

• verify your OC4J configuration, particularly the swapping out of the Oracle XML parser.  Instructions on how to configure an new XML parser is described in Configure the OC4J stand alone server, section 4.