[jira] [Created] (ZEPPELIN-3126) More than 2 notebooks in R failing with error sparkr intrepreter not responding

["Meethu Mathew (JIRA)" <ji...@apache.org>]

Meethu Mathew created ZEPPELIN-3126:
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             Summary: More than 2 notebooks in R failing with error sparkr intrepreter not responding
                 Key: ZEPPELIN-3126
                 URL: https://issues.apache.org/jira/browse/ZEPPELIN-3126
             Project: Zeppelin
          Issue Type: Bug
          Components: r-interpreter
    Affects Versions: 0.7.2
         Environment: spark version 1.6.2


            Reporter: Meethu Mathew
            Priority: Critical


Spark interpreter is in per note Scoped mode.
Please find the steps below to reproduce the issue:
1. Create a notebook (Note1) and run any r code in a paragraph. I ran the following code.
%r
rdf <- data.frame(c(1,2,3,4))
colnames(rdf) <- c("myCol")
sdf <- createDataFrame(sqlContext, rdf)  
withColumn(sdf, "newCol", sdf$myCol * 2.0)

2.  Create another notebook (Note2) and run any r code in a paragraph. I ran the same code as above.

Till now everything works fine.

3. Create third notebook (Note3) and run any r code in a paragraph. I ran the same code. This notebook fails with the error 
org.apache.zeppelin.interpreter.InterpreterException: sparkr is not responding 

The problem will be solved on restarting the sparkr interpreter and another 2 models could be executed successfully. But again, for the third model run using the sparkr interpreter, the error is thrown. 
Once a notebook throws the error, all further notebooks will throw the same error and each time we run those failed notebooks, a new R shell process will be started and these processes are not getting killed even if we we delete the failed notebook.i.e it does not reuse original R shell after failure



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