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

[Simon Franquet (JIRA)]

    [ https://issues.jboss.org/browse/JASSIST-257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13147507#comment-13147507 ] 

Simon Franquet commented on JASSIST-257:
----------------------------------------

Thanks for your comment, we use a legacy code that run on Java 1.6, and this version claims to be 1.6 compatible, hope that next releases of javassist will fix this, in order to benefit from various improvements.

> 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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