After compiling the Spark 1.2.0 codebase in Intellj Idea, and run the LocalPi example，I got the following slf4j related issue. Does anyone know how to fix this? Thanks
Error:scalac: bad symbolic reference. A signature in Logging.class refers to type Logger in package org.slf4j which is not available. It may be completely missing from the current classpath, or the version on the classpath might be incompatible with the version used when compiling Logging.class.
