[jboss-jira] [JBoss JIRA] (JASSIST-257) java.lang.UnsupportedClassVersionError: javassist/ClassPool : Unsupported major.minor version 52.0

[Mike Du (JIRA)]

    [ https://issues.jboss.org/browse/JASSIST-257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13178389#comment-13178389 ] 

Mike Du commented on JASSIST-257:
---------------------------------

The latest version of the precomipled javassist.jar in master branch (from 21.02.2016) still has this issue. 
https://github.com/jboss-javassist/javassist/blob/master/javassist.jar
CtClass,CtMember,CtField,.. all have a class version of 52 (0x34 hex = java 1.8) while other classes (like ClassPool) have 50 (0x32  hex = java 1.6)
Manual recompile with ant helps.

(The taged 3.20 ga release in github appears to be correct. At least for the couple of classes i checked)

> java.lang.UnsupportedClassVersionError: javassist/ClassPool : Unsupported major.minor version 52.0
> --------------------------------------------------------------------------------------------------
>
>                 Key: JASSIST-257
>                 URL: https://issues.jboss.org/browse/JASSIST-257
>             Project: Javassist
>          Issue Type: Release
>         Environment: Linux Tomcat 7 / JDK 1.6.0.41 / RHEL 5
> Javassist version 3.20.0-GA
>            Reporter: Simon Franquet
>            Assignee: Shigeru Chiba
>
> Sorry, not sure it's the right place to post this, but anyway : during instrumentation, class  transformation fails with the this :
>  Redefinition class failed !
> java.lang.UnsupportedClassVersionError: javassist/ClassPool : Unsupported major.minor version 52.0
>         at java.lang.ClassLoader.defineClass1(Native Method)
>         at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
>         at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
>         at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
>         at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
>         at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
>         at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
>         at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
>         at com.meilleuregestion.instrumentation.Transformer.transform(Transformer.java:33)
>         at sun.instrument.TransformerManager.transform(TransformerManager.java:169)
>         at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:365)
>         at java.lang.ClassLoader.defineClass1(Native Method)
>         at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
>         at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
>         at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
>         at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2895)
>         at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1173)
>         at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1681)
>         at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
>         at org.apache.catalina.util.Introspection.loadClass(Introspection.java:143)
>         at org.apache.catalina.startup.WebAnnotationSet.loadApplicationServletAnnotations(WebAnnotationSet.java:135)



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