该配置是在zeppelin的Interpreter的后台配置文件：conf/Interpreter.json spark Interpreter的模块定义那里。特别感谢开发团队组长大神的提示，深入挖掘到zeppelin的Interpreter的shared、scoped和isolated的配置与调优。
[1]Each Interpreter Setting can choose one of 'shared', 'scoped', 'isolated' interpreter binding mode. In 'shared' mode, every notebook bound to the Interpreter Setting will share the single Interpreter instance. In 'scoped' mode, each notebook will create new Interpreter instance in the same interpreter process. In 'isolated' mode, each notebook will create new Interpreter process.
参考：
[1]zeppelin官网：https://zeppelin.apache.org/docs/0.6.2/manual/interpreters.html