[jira] [Created] (ZEPPELIN-1676) Livy-interpreter: convert livy scala magic line execution into block execution

["Praveen Kanamarlapudi (JIRA)" <ji...@apache.org>]

Praveen Kanamarlapudi created ZEPPELIN-1676:
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             Summary: Livy-interpreter: convert livy scala magic line execution into block execution
                 Key: ZEPPELIN-1676
                 URL: https://issues.apache.org/jira/browse/ZEPPELIN-1676
             Project: Zeppelin
          Issue Type: Bug
          Components: livy-interpreter
    Affects Versions: 0.7.0
         Environment: OS: Linux
            Reporter: Praveen Kanamarlapudi


Livy interpreter is not starting a session when I directly call "%livy.sql" magic. Everytime I have to start a session using scala magic and then I need to run sql using sql magic.

It would be better, if livy.sql magic automatically starts a session for me, even if there is no active livy session.

Steps to reproduce the issue:

1. Restart the livy interpreter.
2. Run a sql as follows
{code}
%livy.sql
show tables
{code}


In the log we can see an error message as below.
{code}
 INFO [2016-11-16 13:05:51,665] ({pool-1-thread-2} RemoteInterpreterServer.java[createInterpreter]:181) - Instantiate interpreter org.apache.zeppelin.livy.LivySparkSQLInterpreter
ERROR [2016-11-16 13:05:51,676] ({pool-1-thread-4} TThreadPoolServer.java[run]:296) - Error occurred during processing of message.
java.lang.NullPointerException
        at org.apache.zeppelin.interpreter.remote.RemoteInterpreterServer.getStatus(RemoteInterpreterServer.java:550)
        at org.apache.zeppelin.interpreter.thrift.RemoteInterpreterService$Processor$getStatus.getResult(RemoteInterpreterService.java:1782)
        at org.apache.zeppelin.interpreter.thrift.RemoteInterpreterService$Processor$getStatus.getResult(RemoteInterpreterService.java:1767)
        at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
        at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
        at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:285)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
 INFO [2016-11-16 13:05:51,694] ({pool-1-thread-2} RemoteInterpreterServer.java[createInterpreter]:181) - Instantiate interpreter org.apache.zeppelin.livy.LivySparkInterpreter
{code}



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