Crunch 0.8.0 does not work for me, while crunch 0.7.0 did.
To be more precise: when I compile crunch 0.8.0 from the git tag, it does work, but the jars downloaded from Maven Central don't.
I compared both jars (mine vs downloaded) and they are indeed different.
you can see (for instance in CrunchTaskContext):
invokevirtual #4; //Method org/apache/hadoop/mapreduce...
invokeinterface #4, 1; //InterfaceMethod org/apache/hadoop/mapreduce...
Which means that crunch 0.8.0 is compiled with an interface iso an abstract class.
the hadoop-1 profile shows a dependency to hadoop 1.1.2 which contains a class iso an interface.
What we think happened is this:
1) compile crunch with hadoop-2 profile:
2) on same machine also compile crunch with hadoop-1 profile, but without clean option.
because of the missing clean, maven won't recompile unchanged classes. which would explain how you end up with crunch 0.8.0 being compiled against hadoop-2 instead of hadoop-1