1. Background
Compile command
lcc@lcc flink$ mvn clean install -Dmaven.test.skip=true -Dhadoop.version=2.7.6 -Dmaven.javadoc.skip=true -Dcheckstyle.skip=true
An error
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 43.758 s