Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/16219#discussion_r91773409
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/streaming/StreamingQuerySuite.scala
---
@@ -369,7 +369,9 @@ class StreamingQuerySuite extends StreamTest with
BeforeAndAfter with Logging {
testQuietly("StreamExecution metadata garbage collection") {
val inputData = MemoryStream[Int]
val mapped = inputData.toDS().map(6 / _)
+ val prevMinBatchesToRetain =
spark.conf.get("spark.sql.streaming.minBatchesToRetain")
+ spark.conf.set("spark.sql.streaming.minBatchesToRetain", 1)
--- End diff --
nit: you can use
```
withSQLConf(SQLConf.MIN_BATCHES_TO_RETAIN.key -> "1") {
...
}
```
to simplify the codes. `withSQLConf` will recover the conf.
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