yaooqinn commented on a change in pull request #30045:
URL: https://github.com/apache/spark/pull/30045#discussion_r506343027
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/command/SetCommand.scala
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@@ -172,7 +172,7 @@ object SetCommand {
case class ResetCommand(config: Option[String]) extends RunnableCommand with
IgnoreCachedData {
override def run(sparkSession: SparkSession): Seq[Row] = {
- val defaults = sparkSession.sparkContext.conf
+ val defaults = sparkSession.sharedState.conf
Review comment:
No. The `sharedState.conf` is a cloned `sparkContext.conf` with other
initial options including the warehouse dir and other static/dynamic configs
set by the 1st SparkSession instance which creates the one and only
`sharedState`.
If there is existing sc when we create the 1st SparkSession (e.g. see the PR
description), the initial configs will go to the `sharedState.conf`, and we use
this version of conf as defaults. Also, later created SparkSession with other
options will not affect the `sharedState.conf`
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