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java.lang.reflect.InvocationTargetException

 
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I use the Jforum 2.1.6, but there is an error after I reboot my server.

  • An error has occurred.

    For detailed error information, please see the HTML source code, and contact the forum Administrator.

    net/jforum/util/SafeHtml (Unsupported major.minor version 49.0)


  • When I view the source of the web page:

  • java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:324)
    at net.jforum.Command.process(Command.java:116)
    at net.jforum.JForum.service(JForum.java:182)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
    at net.jforum.util.legacy.clickstream.ClickstreamFilter.doFilter(ClickstreamFilter.java:59)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
    at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
    at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
    at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
    at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
    at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
    at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
    at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
    at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
    at java.lang.Thread.run(Thread.java:534)
    Caused by: java.lang.UnsupportedClassVersionError: net/jforum/util/SafeHtml (Unsupported major.minor version 49.0)
    at java.lang.ClassLoader.defineClass0(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:539)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
    at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1634)
    at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:860)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1307)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1189)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
    at net.jforum.view.forum.common.PostCommon.preparePostForDisplay(PostCommon.java:114)
    at net.jforum.view.forum.common.PostCommon.topicPosts(PostCommon.java:287)
    at net.jforum.view.forum.PostAction.list(PostAction.java:152)
    ... 34 more

    END ERROR STACK TRACE-->


  • My configuration is as follow:
    Solaris 9, JDK1.4.2_05 + Tomcat 5.0.28

    How can I deal with this? Thanks.

    [originally posted on jforum.net by DBlue]
     
    Migrated From Jforum.net
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    It seems the same error when I access our forum(the communities of www.jforum.net) yesterday afternoon. Just a coincidence? 8)
    [originally posted on jforum.net by DBlue]
     
    Migrated From Jforum.net
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    No.

    Your error is Caused by: java.lang.UnsupportedClassVersionError: net/jforum/util/SafeHtml (Unsupported major.minor version 49.0) , which means you're using an older version of the Java Virtual Machine than the one used to compile JForum.

    The problem we had here was some issues with the server we're hosted on.

    Rafael
    [originally posted on jforum.net by Rafael Steil]
     
    Migrated From Jforum.net
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    Thanks, I'll try it.
    [originally posted on jforum.net by DBlue]
     
    It is sorta covered in the JavaRanch Style Guide.
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