Github user yywwd commented on the issue:
https://github.com/apache/zeppelin/pull/2231
@zjffdu I change the yarn mode into "yarn-cluster" as SivaKaviyappa
suggested, Zeppelin works well. However, when I use programmatic API, it will
throw such exception: ImportError: No module named cloudpickle.cloudpickle. If
I change the yarn mode into default mode, that is "yarn", programmatic API will
works well, but Zeppelin still cannot work. My cluster is EMR-5.14.0,
Application: Ganglia 3.7.2, Spark 2.3.0, Zeppelin 0.7.3, Livy 0.4.0
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