Github user carsonwang commented on a diff in the pull request:
https://github.com/apache/spark/pull/9991#discussion_r45952482
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/execution/ui/SQLListenerSuite.scala
---
@@ -343,6 +343,8 @@ class SQLListenerMemoryLeakSuite extends SparkFunSuite {
.set("spark.sql.ui.retainedExecutions", "50") // Set it to 50 to run
this test quickly
val sc = new SparkContext(conf)
try {
+ // Clear the sql listener created by a previous test suite.
+ SQLContext.clearSqlListener()
--- End diff --
I see. Is it enough to make `SQLContext.clearSqlListner` public here? So we
provide a way to clear the reference for users who want the object to be GCed.
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