UnsupportedClassVersionError in jmx-console

[greydeath]

Hi

I get the following error all of a sudden when I try to open the jmx-console.

java.lang.UnsupportedClassVersionError: org/apache/jsp/index_jsp (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 java.net.URLClassLoader.defineClass(URLClassLoader.java:251)
at java.net.URLClassLoader.access$100(URLClassLoader.java:55)
at java.net.URLClassLoader$1.run(URLClassLoader.java:194)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:156)
at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:69)
at org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:548)
at org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:136)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:307)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)


Can anybody tell me please how this can happen? It worked before and I didn't change anything. I even binary compared the installation with to original download. nothing changed.

Does anybody know which jar file this is anyway? and what I could do to solve it?

Please help
Mike

[pjrichter]

I was getting the same error running JBoss 3.2.5. I had upgrade my jdk to 1.5 but had forgotten to change my JAVA_HOME to point to the new jdk. When I corrected that, it started working.