Jeff Zhang created ZEPPELIN-1403:
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             Summary: Should maintain the using port list
                 Key: ZEPPELIN-1403
                 URL: https://issues.apache.org/jira/browse/ZEPPELIN-1403
             Project: Zeppelin
          Issue Type: Improvement
    Affects Versions: 0.6.1
            Reporter: Jeff Zhang
            Assignee: Jeff Zhang
            Priority: Minor
             Fix For: 0.7.0


For now, in RemoteInterpreterManagedProcess we will first find one available 
port and then use this port in the interpreter process. But it is possible that 
2 interpreters use the same port.  Here's the scenarios.

1. Thread1 (Interpreter A) find available port 3000 
2. Thread2 (Interpreter B) find available port 3000 
3. Process for Interpreter A starts
4. Process for Interpreter B starts



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