When I was doing a migration / upgrade to Spring 3.1, I faced a really weird Error.
My App was using Jetty to run deploy my WAR file.
Short story / Long Story
Although I was not using MX4J library in my project, I remembered that:
"Jetty defaults to overriding the normal J2SE class loader delegation model (which calls for delegating to the parent)."
Therefore, this could be fixed by using this System Property:
This is how you should do it in your pom:
And that error will go away.
My App was using Jetty to run deploy my WAR file.
Short story / Long Story
Although I was not using MX4J library in my project, I remembered that:
"Jetty defaults to overriding the normal J2SE class loader delegation model (which calls for delegating to the parent)."
Therefore, this could be fixed by using this System Property:
-Dorg.mortbay.jetty.webapp.parentLoaderPriority=true
This is how you should do it in your pom:
And that error will go away.
