Github user H4ml3t commented on the pull request: https://github.com/apache/incubator-zeppelin/pull/605 Hi all, I can confirm, using release 0.5.6 and external Spark 1.5.1 cdh 5.5, I must add to zeppelin-env.sh ```ZEPPELIN_INTP_JAVA_OPTS="-Dspark.yarn.isPython=true"``` with master `yarn-client` Maybe it's better to add it in the documentation? Cheers, Luca
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