Unsupported major.minor version 49.0

Question

I am getting the following exception whenever I login to my application ...

javax.servlet.ServletException: com/sun/org/apache/xalan/internal/xsltc/

Answer 1

You have some code compiled with Java 5 features that you're trying to run on a 1.4 or earlier JVM. Check your JAVA_HOME variable is pointing at a 1.5 or later JDK.

Update: In your comment you say you are using WAS 5.1. WAS 5.1 doesn't support Java 5, from memory you need to be on WAS 6.1 to use Java 5 (looking for reference...)