railo express not start on a mac

[Itcoder]

this is the message:

Last login: Sat Sep 6 17:52:13 on ttys000
MacBook-Air-di-marc:~ marcplati$ /Applications/railo-express-4.2.1.000-macosx/start ; exit;
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/eclipse/jetty/start/Main : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
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)
logout

Thanks for any help !

[Michael Offner]

This indicates that you execute java code (...jetty...Main, a class from the jetty web server ) that was compiled for a newer jre than you have installed. Execute 

java -version 

on command prompt to get you version and post it here please.

Micha

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/micha

Michael Offner CTO Railo Technologies GmbH

[Michael Offner]

I did some more digging, version 51.0 is java 7, so jetty is compiled for java 7. This means you have to update your java version to 7. Mac osx should suggested that already a long time ago. At least it did on my macs.

Micha