[jbossseam-issues] [JBoss JIRA] Commented: (JBSEAM-2690) Websphere on Windows JPA reference guide example throws a ClassCastException

[Eric Jung (JIRA)]

    [ https://jira.jboss.org/jira/browse/JBSEAM-2690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12427832#action_12427832 ] 

Eric Jung commented on JBSEAM-2690:
-----------------------------------

Posting the solution directly as requested by Peter.

Here is the solution to get rid of java.lang.ClassCastException: org.jboss.seam.persistence.EntityManagerFactory incompatible with javax.persistence.EntityManagerFactory

1. Ensure <ear-project>/META-INF/ibmconfig/cells/defaultCell/applications/defaultApp/deployments/defaultApp/deployment.xml has *three* modules entries (your war, your jar with ejbs, and jboss-seam.jar). By default, you'll only have two. The file should look like this, with the filenames for the jar and ear appropriate for your project.


<?xml version="1.0" encoding="UTF-8"?>
<appdeployment:Deployment xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:appdeployment="http://www.ibm.com/websphere/appserver/schemas/5.0/appdeployment.xmi" xmi:id="Deployment_1219936444526">
  <deployedObject xmi:type="appdeployment:ApplicationDeployment" xmi:id="ApplicationDeployment_1219936444526" startingWeight="10" warClassLoaderPolicy="SINGLE">
    <modules xmi:type="appdeployment:WebModuleDeployment" xmi:id="WebModuleDeployment_1219936444526" startingWeight="10000" uri="my-war.war"/>
    <modules xmi:type="appdeployment:EJBModuleDeployment" xmi:id="EJBModuleDeployment_1219936444526" startingWeight="5000" uri="jboss-seam.jar"/>
    <modules xmi:type="appdeployment:EJBModuleDeployment" xmi:id="EJBModuleDeployment_1219937434401" startingWeight="5000" uri="my-jar.jar" />
    <classloader xmi:id="Classloader_1219936444526" mode="PARENT_FIRST"/>
  </deployedObject>
</appdeployment:Deployment>


A few things to note about this file:

a. warClassLoaderPolicy="SINGLE" - I am not sure this is necessary

b. The numbers after WebModuleDeployment_, EJBModuleDeployment_, and Classloader_ come from the complete deployment.xml file. That file can be found at <WAS-install-dir>\sdp70\runtimes\base_v61\profiles\<app-server>\config\cells\cell-name\applications\<ear-name.ear>\deployments\<ear-project-name>\deployment.xml. This is the same file where you can ensure PARENT_LAST is set both of the WAR and the EAR since the admin console doesn't always work when setting these.

2. Create default ibm-application-ext.xmi and ibm-application-ext-pme.xmi files in the <ear>/META-INF folder (siblings to application.xml). If you're using RAD, this can be done by:

a. Open application.xml in RAD so you get the wizard.

b. On the Overview tab of the wizard, check "Shared session context". Click the save button on the toolbar. You should now have a ibm-application-ext.xmi file. Uncheck "Shared session context" and click save again. You'll now have a default ibm-application-ext.xmi.

c. On the Extended Services tab, check "Last participant support". Click the save button on the toolbar. You should now have a ibm-application-ext-pme.xmi file. Uncheck "Last participant support" and click save again. You'll now have a default ibm-application-ext-pme.xmi.

Rebuild and and restart twice. No more java.lang.ClassCastException: org.jboss.seam.persistence.EntityManagerFactory incompatible with javax.persistence.EntityManagerFactory error.

Eric

> Websphere on Windows JPA reference guide example throws a ClassCastException
> ----------------------------------------------------------------------------
>
>                 Key: JBSEAM-2690
>                 URL: https://jira.jboss.org/jira/browse/JBSEAM-2690
>             Project: Seam
>          Issue Type: Bug
>          Components: Documentation Issues, Platform interoperability
>    Affects Versions: 2.0.1.GA, 2.1.0.A1
>         Environment: Webspher 6.1 on Windows
>            Reporter: Jay Balunas
>            Assignee: Jay Balunas
>            Priority: Minor
>             Fix For: The future
>
>
> Several users have reported that on windows following the reference guide JPA example results in a ClassCastException.
> The issue you are seeing "java.lang.ClassCastException:  org.jboss.seam.persistence.EntityManagerFactory incompatible with  javax.persistence.EntityManagerFactory:" 
> Following the forum link a user suggests a solution to the issue on windows.
> Need to verify websphere windows error, and test user fix.  Then update document as needed.

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