Can you show the exact classpath you're using?
To debug this, I usually add this statement at the beginning of my code:
This will show what jars are on
via hadoop-general by Owen O'Malley, 11 months ago
Could not initialize class
> >> inject/internal/collect/Lists
> >> at com.google.inject.multibindings.Multibinder
> >> $RealMultibinder.initialize(Multibinder.java:254)
> >> at org.opt4j.start.Opt4JModule.multi(Opt4JModule.java:128)
> >> This was after I fixed
The owner protected this stack trace.
You have a different solution? A short tip here would help you and many other users who saw this issue last week.