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Posted to reviews@spark.apache.org by viirya <gi...@git.apache.org> on 2017/01/03 03:35:29 UTC
[GitHub] spark pull request #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession init...
GitHub user viirya opened a pull request:
https://github.com/apache/spark/pull/16454
[SPARK-19055][SQL][PySpark] Fix SparkSession initialization when SparkContext is stopped
## What changes were proposed in this pull request?
In SparkSession initialization, we store created the instance of SparkSession into a class variable _instantiatedContext. Next time we can use SparkSession.builder.getOrCreate() to retrieve the existing SparkSession instance.
However, when the active SparkContext is stopped and we create another new SparkContext to use, the existing SparkSession is still associated with the stopped SparkContext. So the operations with this existing SparkSession will be failed.
We need to detect such case in SparkSession and renew the class variable _instantiatedContext if needed.
## How was this patch tested?
New test added in PySpark.
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/viirya/spark-1 fix-pyspark-sparksession
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16454.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 #16454
----
commit 80bba5ead0601f3ef4b05fff5391d07a61e06341
Author: Liang-Chi Hsieh <vi...@gmail.com>
Date: 2017-01-03T03:06:21Z
Fix SparkSession initialization when previous SparkContext is stopped and new SparkContext is created.
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the issue:
https://github.com/apache/spark/pull/16454
**[Test build #70979 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/70979/testReport)** for PR 16454 at commit [`6078c7d`](https://github.com/apache/spark/commit/6078c7dd37152301859d31789ca571a6be92f4eb).
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by cloud-fan <gi...@git.apache.org>.
Github user cloud-fan commented on the issue:
https://github.com/apache/spark/pull/16454
retest this please
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the issue:
https://github.com/apache/spark/pull/16454
**[Test build #70962 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/70962/testReport)** for PR 16454 at commit [`a22a08f`](https://github.com/apache/spark/commit/a22a08fd8655862fbbadc7b376b1a0ad8acfaadb).
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[GitHub] spark pull request #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession init...
Posted by asfgit <gi...@git.apache.org>.
Github user asfgit closed the pull request at:
https://github.com/apache/spark/pull/16454
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the issue:
https://github.com/apache/spark/pull/16454
**[Test build #70962 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/70962/testReport)** for PR 16454 at commit [`a22a08f`](https://github.com/apache/spark/commit/a22a08fd8655862fbbadc7b376b1a0ad8acfaadb).
* This patch passes all tests.
* This patch merges cleanly.
* This patch adds no public classes.
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[GitHub] spark pull request #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession init...
Posted by vijoshi <gi...@git.apache.org>.
Github user vijoshi commented on a diff in the pull request:
https://github.com/apache/spark/pull/16454#discussion_r94903274
--- Diff: python/pyspark/sql/session.py ---
@@ -214,8 +214,14 @@ def __init__(self, sparkContext, jsparkSession=None):
self._wrapped = SQLContext(self._sc, self, self._jwrapped)
_monkey_patch_RDD(self)
install_exception_handler()
- if SparkSession._instantiatedContext is None:
- SparkSession._instantiatedContext = self
+ if SparkSession._instantiatedSession is None:
+ SparkSession._instantiatedSession = self
+ else:
+ # If we had an instantiated SparkSession attached with a SparkContext
+ # which is stopped now, we need to renew the instantiated SparkSession.
+ # Otherwise, we will use invalid SparkSession when we call Builder.getOrCreate.
+ if SparkSession._instantiatedSession._sc._jsc is None:
+ SparkSession._instantiatedSession = self
--- End diff --
Would this be simpler ?
```
if SparkSession._instantiatedSession is None \
or SparkSession._instantiatedSession._sc._jsc is None:
SparkSession._instantiatedContext = self
```
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[GitHub] spark pull request #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession init...
Posted by rdblue <gi...@git.apache.org>.
Github user rdblue commented on a diff in the pull request:
https://github.com/apache/spark/pull/16454#discussion_r95258453
--- Diff: python/pyspark/sql/session.py ---
@@ -161,8 +161,8 @@ def getOrCreate(self):
with self._lock:
from pyspark.context import SparkContext
from pyspark.conf import SparkConf
- session = SparkSession._instantiatedContext
- if session is None:
+ session = SparkSession._instantiatedSession
+ if session is None or session._sc._jsc is None:
--- End diff --
#16519 adds `isStopped`, which I think is a better way of checking whether the Spark context is valid than just checking whether `_jsc` is defined because `_jsc` could be stopped.
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the issue:
https://github.com/apache/spark/pull/16454
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by rdblue <gi...@git.apache.org>.
Github user rdblue commented on the issue:
https://github.com/apache/spark/pull/16454
I just posted a fix to this also. I'll close that one in favor of this and add comments here for what it did differently that we should consider.
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[GitHub] spark pull request #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession init...
Posted by viirya <gi...@git.apache.org>.
Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/16454#discussion_r95055690
--- Diff: python/pyspark/sql/tests.py ---
@@ -1886,6 +1887,28 @@ def test_hivecontext(self):
self.assertTrue(os.path.exists(metastore_path))
+class SQLTests2(ReusedPySparkTestCase):
--- End diff --
`ReusedPySparkTestCase` launches a class's spark context. So I use it as the default spark context.
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[GitHub] spark pull request #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession init...
Posted by viirya <gi...@git.apache.org>.
Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/16454#discussion_r94903491
--- Diff: python/pyspark/sql/session.py ---
@@ -214,8 +214,14 @@ def __init__(self, sparkContext, jsparkSession=None):
self._wrapped = SQLContext(self._sc, self, self._jwrapped)
_monkey_patch_RDD(self)
install_exception_handler()
- if SparkSession._instantiatedContext is None:
- SparkSession._instantiatedContext = self
+ if SparkSession._instantiatedSession is None:
+ SparkSession._instantiatedSession = self
+ else:
+ # If we had an instantiated SparkSession attached with a SparkContext
+ # which is stopped now, we need to renew the instantiated SparkSession.
+ # Otherwise, we will use invalid SparkSession when we call Builder.getOrCreate.
+ if SparkSession._instantiatedSession._sc._jsc is None:
+ SparkSession._instantiatedSession = self
--- End diff --
yeah. sure.
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the issue:
https://github.com/apache/spark/pull/16454
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the issue:
https://github.com/apache/spark/pull/16454
**[Test build #70793 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/70793/testReport)** for PR 16454 at commit [`80bba5e`](https://github.com/apache/spark/commit/80bba5ead0601f3ef4b05fff5391d07a61e06341).
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the issue:
https://github.com/apache/spark/pull/16454
**[Test build #70793 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/70793/testReport)** for PR 16454 at commit [`80bba5e`](https://github.com/apache/spark/commit/80bba5ead0601f3ef4b05fff5391d07a61e06341).
* This patch passes all tests.
* This patch merges cleanly.
* This patch adds no public classes.
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https://github.com/apache/spark/pull/16454
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[GitHub] spark pull request #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession init...
Posted by viirya <gi...@git.apache.org>.
Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/16454#discussion_r94905140
--- Diff: python/pyspark/sql/session.py ---
@@ -214,8 +214,14 @@ def __init__(self, sparkContext, jsparkSession=None):
self._wrapped = SQLContext(self._sc, self, self._jwrapped)
_monkey_patch_RDD(self)
install_exception_handler()
- if SparkSession._instantiatedContext is None:
- SparkSession._instantiatedContext = self
+ if SparkSession._instantiatedSession is None:
+ SparkSession._instantiatedSession = self
+ else:
+ # If we had an instantiated SparkSession attached with a SparkContext
+ # which is stopped now, we need to renew the instantiated SparkSession.
+ # Otherwise, we will use invalid SparkSession when we call Builder.getOrCreate.
+ if SparkSession._instantiatedSession._sc._jsc is None:
+ SparkSession._instantiatedSession = self
--- End diff --
`SparkSession._instantiatedSession._sc` is from the `sparkContext` passed into `__init__`. I think it should not be None.
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the issue:
https://github.com/apache/spark/pull/16454
**[Test build #71251 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/71251/testReport)** for PR 16454 at commit [`6078c7d`](https://github.com/apache/spark/commit/6078c7dd37152301859d31789ca571a6be92f4eb).
* This patch passes all tests.
* This patch merges cleanly.
* This patch adds no public classes.
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[GitHub] spark pull request #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession init...
Posted by rdblue <gi...@git.apache.org>.
Github user rdblue commented on a diff in the pull request:
https://github.com/apache/spark/pull/16454#discussion_r95846995
--- Diff: python/pyspark/sql/session.py ---
@@ -161,8 +161,8 @@ def getOrCreate(self):
with self._lock:
from pyspark.context import SparkContext
from pyspark.conf import SparkConf
- session = SparkSession._instantiatedContext
- if session is None:
+ session = SparkSession._instantiatedSession
+ if session is None or session._sc._jsc is None:
--- End diff --
Yeah, I had to change to just checking whether _jsc was defined in our branch for the same reason. I'd prefer to add isStopped to Java and Python eventually, but that doesn't need to block this commit.
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by cloud-fan <gi...@git.apache.org>.
Github user cloud-fan commented on the issue:
https://github.com/apache/spark/pull/16454
how about we set `_instantiatedSession` to None in `SparkContext.stop`?
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[GitHub] spark pull request #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession init...
Posted by viirya <gi...@git.apache.org>.
Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/16454#discussion_r95724161
--- Diff: python/pyspark/sql/session.py ---
@@ -161,8 +161,8 @@ def getOrCreate(self):
with self._lock:
from pyspark.context import SparkContext
from pyspark.conf import SparkConf
- session = SparkSession._instantiatedContext
- if session is None:
+ session = SparkSession._instantiatedSession
+ if session is None or session._sc._jsc is None:
--- End diff --
Actually `_jsc` is a `JavaSparkContext` instead of `SparkContext` and it doesn't have `isStopped`.
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by cloud-fan <gi...@git.apache.org>.
Github user cloud-fan commented on the issue:
https://github.com/apache/spark/pull/16454
LGTM
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the issue:
https://github.com/apache/spark/pull/16454
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by viirya <gi...@git.apache.org>.
Github user viirya commented on the issue:
https://github.com/apache/spark/pull/16454
@vanzin yup, I also think about it too. Maybe we should use `_instantiatedSession` to replace it.
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[GitHub] spark pull request #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession init...
Posted by viirya <gi...@git.apache.org>.
Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/16454#discussion_r95724228
--- Diff: python/pyspark/sql/session.py ---
@@ -161,8 +161,8 @@ def getOrCreate(self):
with self._lock:
from pyspark.context import SparkContext
from pyspark.conf import SparkConf
- session = SparkSession._instantiatedContext
- if session is None:
+ session = SparkSession._instantiatedSession
+ if session is None or session._sc._jsc is None:
--- End diff --
We can add `isStopped` to `JavaSparkContext`, but I will prefer to solve it in Python side if possible.
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[GitHub] spark pull request #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession init...
Posted by felixcheung <gi...@git.apache.org>.
Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/16454#discussion_r94904472
--- Diff: python/pyspark/sql/session.py ---
@@ -214,8 +214,14 @@ def __init__(self, sparkContext, jsparkSession=None):
self._wrapped = SQLContext(self._sc, self, self._jwrapped)
_monkey_patch_RDD(self)
install_exception_handler()
- if SparkSession._instantiatedContext is None:
- SparkSession._instantiatedContext = self
+ if SparkSession._instantiatedSession is None:
+ SparkSession._instantiatedSession = self
+ else:
+ # If we had an instantiated SparkSession attached with a SparkContext
+ # which is stopped now, we need to renew the instantiated SparkSession.
+ # Otherwise, we will use invalid SparkSession when we call Builder.getOrCreate.
+ if SparkSession._instantiatedSession._sc._jsc is None:
+ SparkSession._instantiatedSession = self
--- End diff --
Can SparkSession._instantiatedSession._sc is None?
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by viirya <gi...@git.apache.org>.
Github user viirya commented on the issue:
https://github.com/apache/spark/pull/16454
`SparkContext` is not associated with `SparkSession` because `SparkSession` is a SQL-only class. So I think it is not good to import sql's `SparkSession` to `SparkContext` and to modify its value.
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[GitHub] spark pull request #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession init...
Posted by rdblue <gi...@git.apache.org>.
Github user rdblue commented on a diff in the pull request:
https://github.com/apache/spark/pull/16454#discussion_r95846835
--- Diff: python/pyspark/sql/session.py ---
@@ -214,8 +214,12 @@ def __init__(self, sparkContext, jsparkSession=None):
self._wrapped = SQLContext(self._sc, self, self._jwrapped)
_monkey_patch_RDD(self)
install_exception_handler()
- if SparkSession._instantiatedContext is None:
- SparkSession._instantiatedContext = self
+ # If we had an instantiated SparkSession attached with a SparkContext
+ # which is stopped now, we need to renew the instantiated SparkSession.
+ # Otherwise, we will use invalid SparkSession when we call Builder.getOrCreate.
+ if SparkSession._instantiatedSession is None \
+ or SparkSession._instantiatedSession._sc._jsc is None:
--- End diff --
If this can't tell whether the java context is stopped, then it should be fine to use this logic. +1.
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[GitHub] spark pull request #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession init...
Posted by viirya <gi...@git.apache.org>.
Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/16454#discussion_r95729251
--- Diff: python/pyspark/sql/session.py ---
@@ -214,8 +214,12 @@ def __init__(self, sparkContext, jsparkSession=None):
self._wrapped = SQLContext(self._sc, self, self._jwrapped)
_monkey_patch_RDD(self)
install_exception_handler()
- if SparkSession._instantiatedContext is None:
- SparkSession._instantiatedContext = self
+ # If we had an instantiated SparkSession attached with a SparkContext
+ # which is stopped now, we need to renew the instantiated SparkSession.
+ # Otherwise, we will use invalid SparkSession when we call Builder.getOrCreate.
+ if SparkSession._instantiatedSession is None \
+ or SparkSession._instantiatedSession._sc._jsc is None:
--- End diff --
Well, as I tried, this would case test failed.
`__init__` and `getOrCreate` are both legal paths. Once one calls `__init__` to get a `SparkSession` and other calls `getOrCreate` later, the second one will be the different session than the first one, if the logic to update `_instantiatedSession` is different.
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the issue:
https://github.com/apache/spark/pull/16454
**[Test build #70979 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/70979/testReport)** for PR 16454 at commit [`6078c7d`](https://github.com/apache/spark/commit/6078c7dd37152301859d31789ca571a6be92f4eb).
* This patch passes all tests.
* This patch merges cleanly.
* This patch adds no public classes.
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the issue:
https://github.com/apache/spark/pull/16454
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[GitHub] spark pull request #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession init...
Posted by holdenk <gi...@git.apache.org>.
Github user holdenk commented on a diff in the pull request:
https://github.com/apache/spark/pull/16454#discussion_r95050517
--- Diff: python/pyspark/sql/tests.py ---
@@ -1886,6 +1887,28 @@ def test_hivecontext(self):
self.assertTrue(os.path.exists(metastore_path))
+class SQLTests2(ReusedPySparkTestCase):
--- End diff --
Is there any particular reason this is built on a `ReusedPySparkTestCase`?
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the issue:
https://github.com/apache/spark/pull/16454
**[Test build #71251 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/71251/testReport)** for PR 16454 at commit [`6078c7d`](https://github.com/apache/spark/commit/6078c7dd37152301859d31789ca571a6be92f4eb).
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by vanzin <gi...@git.apache.org>.
Github user vanzin commented on the issue:
https://github.com/apache/spark/pull/16454
Looks ok but I wonder why the variable is called `_instantiatedContext` and not `_instantiatedSession` or something that says it's a session.
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by viirya <gi...@git.apache.org>.
Github user viirya commented on the issue:
https://github.com/apache/spark/pull/16454
cc @cloud-fan @holdenk @srowen @davies
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by cloud-fan <gi...@git.apache.org>.
Github user cloud-fan commented on the issue:
https://github.com/apache/spark/pull/16454
thanks, merging to maser/2.1/2.0
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[GitHub] spark pull request #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession init...
Posted by viirya <gi...@git.apache.org>.
Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/16454#discussion_r95724518
--- Diff: python/pyspark/sql/session.py ---
@@ -161,8 +161,8 @@ def getOrCreate(self):
with self._lock:
from pyspark.context import SparkContext
from pyspark.conf import SparkConf
- session = SparkSession._instantiatedContext
- if session is None:
+ session = SparkSession._instantiatedSession
+ if session is None or session._sc._jsc is None:
--- End diff --
I can change it to `isStopped` way if others also prefer that.
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the issue:
https://github.com/apache/spark/pull/16454
Merged build finished. Test PASSed.
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the issue:
https://github.com/apache/spark/pull/16454
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[GitHub] spark pull request #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession init...
Posted by viirya <gi...@git.apache.org>.
Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/16454#discussion_r95725013
--- Diff: python/pyspark/sql/session.py ---
@@ -214,8 +214,12 @@ def __init__(self, sparkContext, jsparkSession=None):
self._wrapped = SQLContext(self._sc, self, self._jwrapped)
_monkey_patch_RDD(self)
install_exception_handler()
- if SparkSession._instantiatedContext is None:
- SparkSession._instantiatedContext = self
+ # If we had an instantiated SparkSession attached with a SparkContext
+ # which is stopped now, we need to renew the instantiated SparkSession.
+ # Otherwise, we will use invalid SparkSession when we call Builder.getOrCreate.
+ if SparkSession._instantiatedSession is None \
+ or SparkSession._instantiatedSession._sc._jsc is None:
--- End diff --
Sounds good. I will do the change, thanks.
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[GitHub] spark pull request #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession init...
Posted by rdblue <gi...@git.apache.org>.
Github user rdblue commented on a diff in the pull request:
https://github.com/apache/spark/pull/16454#discussion_r95259073
--- Diff: python/pyspark/sql/session.py ---
@@ -214,8 +214,12 @@ def __init__(self, sparkContext, jsparkSession=None):
self._wrapped = SQLContext(self._sc, self, self._jwrapped)
_monkey_patch_RDD(self)
install_exception_handler()
- if SparkSession._instantiatedContext is None:
- SparkSession._instantiatedContext = self
+ # If we had an instantiated SparkSession attached with a SparkContext
+ # which is stopped now, we need to renew the instantiated SparkSession.
+ # Otherwise, we will use invalid SparkSession when we call Builder.getOrCreate.
+ if SparkSession._instantiatedSession is None \
+ or SparkSession._instantiatedSession._sc._jsc is None:
--- End diff --
What about setting `SparkSession._instantiatedSession` to `None` in `getOrCreate` instead of duplicating the logic?
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[GitHub] spark issue #16454: [SPARK-19055][SQL][PySpark] Fix SparkSession initializat...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the issue:
https://github.com/apache/spark/pull/16454
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