Herman van Hövell created SPARK-32991:
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Summary: RESET can clear StaticSQLConfs
Key: SPARK-32991
URL: https://issues.apache.org/jira/browse/SPARK-32991
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.0.1
Reporter: Herman van Hövell
The RESET command can clear a sessions' static SQL configurations, when that
static SQL configuration was set on a SparkSession that uses a pre-existing
SparkContext. Here is repro:
{code:java}
// Blow away any pre-existing session thread locals
org.apache.spark.sql.SparkSession.clearDefaultSession()
org.apache.spark.sql.SparkSession.clearActiveSession()
// Create new session and explicitly set a spark context
val newSession = org.apache.spark.sql.SparkSession.builder
.sparkContext(sc)
.config("spark.sql.globalTempDatabase", "bob")
.getOrCreate()
assert(newSession.conf.get("spark.sql.globalTempDatabase") == "bob")
newSession.sql("reset")
assert(newSession.conf.get("spark.sql.globalTempDatabase") == "bob") // Boom!
{code}
The problem is that RESET assumes it can use the SparkContext's configurations
as its default.
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