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

[Guillaume Rousseau (JIRA)]

    [ https://issues.jboss.org/browse/JASSIST-257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13504598#comment-13504598 ] 

Guillaume Rousseau commented on JASSIST-257:
--------------------------------------------

Hello,

I have the same problem, Tried to recompile with ant but I need to find a version of ant where 1.7 is supported.

C:\Java\javassist-rel_3_21_0_ga>ant7
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/apache/tools/ant/launch/Launcher : Unsupported major.minor version 52.0
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)

Could you please provide us an url where we can find directly a version of javassist that is compatible with previous JDK ?

I would help a lot.


> 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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