Common Exceptions and possible reasons

java.lang.NoClassDefFoundError

This is probably when you have a problem with the binary version of a dependency.

java.lang.AbstractMethodError

This probably is also a jar version problem.

java.lang.NoSuchMethodError

This probably is also a jar version problem.

java.util.zip.ZipException

: invalid CEN header (bad signature)

This is the jar file exceeding 64k problem. The solution is to use --bundle option of scald.rb.

cascading.flow.planner.PlannerException

Cascading requires all sources to have final sinks on disk. This exception happens when you miss an output for an input. It also could signify an attempt to write an unserializable datatype.

com.twitter.scalding.InvalidSourceException

This happens when data is missing from the path you provied.