Ryan Blue created SPARK-19138:
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Summary: Python: new HiveContext will use a stopped SparkContext
Key: SPARK-19138
URL: https://issues.apache.org/jira/browse/SPARK-19138
Project: Spark
Issue Type: Bug
Components: PySpark
Reporter: Ryan Blue
We have users that run a notebook cell that creates a new SparkContext to
overwrite some of the default initial parameters:
{code:lang=python}
if 'sc' in globals():
#Stop the running SparkContext if there is one running.
sc.stop()
conf = SparkConf().setAppName("app")
#conf.set('spark.sql.shuffle.partitions', '2000')
sc = SparkContext(conf=conf)
sqlContext = HiveContext(sc)
{code}
In Spark 2.0, this creates an invalid SQLContext that uses the original
SparkContext because the [HiveContext
contstructor|https://github.com/apache/spark/blob/master/python/pyspark/sql/context.py#L514]
uses SparkSession.getOrCreate that has the old SparkContext. A SparkSession
should be invalidated and no longer returned by getOrCreate if its SparkContext
has been stopped.
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