GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/22056
[SPARK-25076][SQL] SQLConf should not be retrieved from a stopped
SparkSession
## What changes were proposed in this pull request?
When a `SparkSession` is stopped, `SQLConf.get` should use the fallback
conf to avoid weird issues like
```
sbt.ForkMain$ForkError: java.lang.IllegalStateException: LiveListenerBus is
stopped.
at
org.apache.spark.scheduler.LiveListenerBus.addToQueue(LiveListenerBus.scala:97)
at
org.apache.spark.scheduler.LiveListenerBus.addToStatusQueue(LiveListenerBus.scala:80)
at
org.apache.spark.sql.internal.SharedState.<init>(SharedState.scala:93)
at
org.apache.spark.sql.SparkSession$$anonfun$sharedState$1.apply(SparkSession.scala:120)
at
org.apache.spark.sql.SparkSession$$anonfun$sharedState$1.apply(SparkSession.scala:120)
at scala.Option.getOrElse(Option.scala:121)
...
```
## How was this patch tested?
a new test suite
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark session
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/22056.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 #22056
----
commit 4b58645f98db544ddbda5e0019fcb21c36b0ca2d
Author: Wenchen Fan <wenchen@...>
Date: 2018-08-09T14:21:47Z
SQLConf should not be retrieved from a stopped SparkSession
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