"provided" vs "compile" in Maven

Sometimes you may encounter below error, when run a simple Spark App built by Maven in IntelliJ IDEA.

Error: ClassNotFoundException: org.apache.spark.SparkConf

Please check the dependency scope of Spark in pom.xml.
Change the scope from "provided" to "compile". Then the problem is solved.

"provided" vs "compile" in Maven

• compile scope is the default scope, and available in all classpaths.
• provided scope is only available on the compilation and test classpath, and dependencies are not transitive. 
• provided dependencies are not packaged

Reference:

http://stackoverflow.com/questions/6646959/difference-between-maven-scope-compile-and-provided-for-jar-packaging