Retrotranslator - EJB class failing with Unsupported major.minor version 50.0 (Java 1.6 to Java 1.4)

[Santhosh Kalisamy]

Friends,

We are using Retrotranslator to translate an application developed with JDK 1.6 to run on Java 1.4 run time environment.

Translation working good with the frontend application (Struts2, JDom2...etc). But, it is failing for our EJB class with the following exception...

Development Java Environment : jdk1.6.0_31
Compilation Java Version : Java 1.6
Run Time JDK : jdk1.4.2_04
RetroTranslator : net.sf.retrotranslator.transformer.RetrotranslatorTask @ retrotranslator-transformer-1.2.9.jar

application.xml (on EAR file)
<application> <display-name>Bulk Fund Switching Service</display-name> <description>Bulk Fund Switching Service Application</description> <module> <ejb>BulkFundSwitching.jar</ejb> </module> <library-directory>lib</library-directory> </application>


ejb-jar.xml
<ejb-jar> <description>BulkFundSwitchingService</description> <display-name>BFSService</display-name> <enterprise-beans> <session> <description>SecurityFacade</description> <display-name>SecurityFacadeEJB</display-name> <ejb-name>SecurityFacadeEJB</ejb-name> <home>com.myc.bfs.interaction.manager.SecurityFacadeHome</home> <remote>com.myc.bfs.interaction.manager.SecurityFacade</remote> <ejb-class>com.myc.bfs.interaction.manager.SecurityFacadeEJB</ejb-class> <session-type>Stateless</session-type> <transaction-type>Container</transaction-type> <security-identity> <use-caller-identity></use-caller-identity> </security-identity> </session> <session> <description>ServiceFacade</description> <display-name>ServiceFacadeEJB</display-name> <ejb-name>ServiceFacadeEJB</ejb-name> <home>com.myc.bfs.interaction.manager.ServiceFacadeHome</home> <remote>com.myc.bfs.interaction.manager.ServiceFacade</remote> <ejb-class>com.myc.bfs.interaction.manager.ServiceFacadeEJB</ejb-class> <session-type>Stateless</session-type> <transaction-type>Container</transaction-type> <security-identity> <use-caller-identity></use-caller-identity> </security-identity> </session> </enterprise-beans> <assembly-descriptor> <container-transaction> <method> <ejb-name>SecurityFacadeEJB</ejb-name> <method-name>*</method-name> </method> <method> <ejb-name>ServiceFacadeEJB</ejb-name> <method-name>*</method-name> </method> <trans-attribute>Required</trans-attribute> </container-transaction> </assembly-descriptor> </ejb-jar>

ant build task for translation
<target name="translate"> <taskdef name="retrotranslator" classname="net.sf.retrotranslator.transformer.RetrotranslatorTask"> <classpath> <fileset dir="${retro.lib}"> <include name="*.jar" /> </fileset> </classpath> </taskdef> <retrotranslator target="1.4" destjar="${ear}/${jarfilename}" advanced="true" smart="true" verify="true" syncvolatile="true" failonwarning="false"> <jarfileset dir="${ear}" includes="${jarfilename}" /> <classpath> <fileset dir="${retro.lib}"> <include name="*.jar" /> </fileset> </classpath> </retrotranslator> </target>

Exception:

2012-08-15 14:24:57,882 INFO [org.jboss.deployment.EARDeployer] Init J2EE application: file:/usr/local/jbossbfs/server/default/deploy/BulkFundSwitching.ear 2012-08-15 14:24:58,941 WARN [org.jboss.ejb.EJBDeployer.verifier] EJB spec violation: Bean : SecurityFacadeEJB Section: 22.2 Warning: The Bean Provider must specify the fully-qualified name of the Java class that implements the enterprise bean's business methods in the <ejb-class> element. Info : Class not found on 'com.myc.bfs.interaction.manager.SecurityFacadeEJB': Unexpected error during load of: com.myc.bfs.interaction.manager.SecurityFacadeEJB, msg=com/myc/bfs/interaction/manager/SecurityFacadeEJB (Unsupported major.minor version 50.0) 2012-08-15 14:24:58,942 WARN [org.jboss.ejb.EJBDeployer.verifier] EJB spec violation: Bean : ServiceFacadeEJB Section: 22.2 Warning: The Bean Provider must specify the fully-qualified name of the Java class that implements the enterprise bean's business methods in the <ejb-class> element. Info : Class not found on 'com.myc.bfs.interaction.manager.ServiceFacadeEJB': Unexpected error during load of: com.myc.bfs.interaction.manager.ServiceFacadeEJB, msg=com/myc/bfs/interaction/manager/ServiceFacadeEJB (Unsupported major.minor version 50.0) 2012-08-15 14:24:58,943 ERROR [org.jboss.deployment.MainDeployer] could not create deployment: file:/usr/local/jbossbfs/server/default/tmp/deploy/tmp63312BulkFundSwitching.ear-contents/BulkFundSwitching.jar org.jboss.deployment.DeploymentException: Verification of Enterprise Beans failed, see above for error messages. at org.jboss.ejb.EJBDeployer.create(EJBDeployer.java:517) at org.jboss.deployment.MainDeployer.create(MainDeployer.java:783) at org.jboss.deployment.MainDeployer.create(MainDeployer.java:775) at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:640)

[Jeanne Boyarsky]

The error message tells you the jar files aren't using Java 1.4. There are a few reasons this could be. The most likely one is that you aren't using the "after" version of the jars. I notice that the documented example uses a different directory for the source jars and destination jars. Can you try that? And look at the generate file sizes to make sure they are in fact different.

[Santhosh Kalisamy]

Thanks Jeanne Boyarsky.

It worked. Strangly, it is working on Eclipse too now. Weird.