[jira] [Created] (TOREE-398) Toree - R : Error in getSparkSession(): SparkSession not initialized when using 'spark'

["Mario Briggs (JIRA)" <ji...@apache.org>]

Mario Briggs created TOREE-398:
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             Summary: Toree - R : Error in getSparkSession(): SparkSession not initialized when using 'spark'
                 Key: TOREE-398
                 URL: https://issues.apache.org/jira/browse/TOREE-398
             Project: TOREE
          Issue Type: Bug
    Affects Versions: 0.2.0
            Reporter: Mario Briggs


Using Toree R interpreter with Spark 2.0.

After kernel is initialized, 'spark' var is available 
>>
spark
Out[19]:
Java ref type org.apache.spark.sql.SparkSession id 33
<<

However trying to use it , ends up with this
>>
localDF <- data.frame(name=c("a", "b", "c"), age=c(19, 23, 18))
df <- createDataFrame(spark, localDF)
Out[20]:
Message: Error in getSparkSession(): SparkSession not initialized
<<

Trying to do sparkR.session(), leads to eror that only one SparkContext can be created

Seem zepellin hit same issue and fixed - https://issues.apache.org/jira/browse/ZEPPELIN-1260

I see 2.0 fixes are around this line - https://github.com/apache/incubator-toree/blob/master/sparkr-interpreter/src/main/resources/kernelR/sparkr_runner.R#L122



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