The problem has been fixed. Zeppelin couldn't find some dependencies. I have followed the following link to fix it: https://community.hortonworks.com/articles/75562/jdbc-hive-interpreter-failing-to-run-with-error-ja.html
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2181 is the Zookeeper port, make sure your Zookeeper ensemble is running and accessible. You might want to create a new question and describe your setup a bit more, it is probably easier to solve this problem then 🙂
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