GitHub user jerryshao opened a pull request:
https://github.com/apache/spark/pull/20404
[SPARK-23228][PYSPARK] Add Python Created jsparkSession to JVM's
defaultSession
## What changes were proposed in this pull request?
In the current PySpark code, Python created `jsparkSession` doesn't add to
JVM's defaultSession, this `SparkSession` object cannot be fetched from Java
side, so the below scala code will be failed when loaded in PySpark application.
```scala
class TestSparkSession extends SparkListener with Logging {
override def onOtherEvent(event: SparkListenerEvent): Unit = {
event match {
case CreateTableEvent(db, table) =>
val session =
SparkSession.getActiveSession.orElse(SparkSession.getDefaultSession)
assert(session.isDefined)
val tableInfo =
session.get.sharedState.externalCatalog.getTable(db, table)
logInfo(s"Table info ${tableInfo}")
case e =>
logInfo(s"event $e")
}
}
}
```
So here propose to add fresh create `jsparkSession` to `defaultSession`.
## How was this patch tested?
Manual verification.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/jerryshao/apache-spark SPARK-23228
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/20404.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 #20404
----
commit d9189ad1763d4ef867027f4ade2a332d589fe698
Author: jerryshao <sshao@...>
Date: 2018-01-26T09:41:28Z
Add Python Create jsparkSession to JVM's defaultSession
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