GitHub user vijoshi opened a pull request:
https://github.com/apache/spark/pull/16119
reuse SparkSession if sparkContext specified same as active one
## What changes were proposed in this pull request?
Change is for SQLContext to reuse the active SparkSession during
construction if the sparkContext supplied is the same as the currently active
SparkContext. Without this change, a new SparkSession is instantiated that
results in a Derby error when attempting to create a dataframe using a new
SQLContext object even though the SparkContext supplied to the new is same as
the currently active one. Refer
https://issues.apache.org/jira/browse/SPARK-18687 for details on the error and
a repro.
## How was this patch tested?
Existing unit tests are successful:
/python/run-tests --python-executables=python --modules=pyspark-sql
Please review http://spark.apache.org/contributing.html before opening a
pull request.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/vijoshi/spark SPARK-18687_master
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16119.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #16119
----
commit d0585d82acc2fcf180b9f694f092fede6201a4db
Author: Vinayak <vijos...@in.ibm.com>
Date: 2016-12-02T09:48:25Z
reuse SparkSession if sparkContext specified same as active one
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