Github user frreiss commented on a diff in the pull request:
https://github.com/apache/spark/pull/15166#discussion_r79722643
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/streaming/StreamingQuerySuite.scala
---
@@ -125,6 +125,30 @@ class StreamingQuerySuite extends StreamTest with
BeforeAndAfter {
)
}
+ testQuietly("StreamExecution metadata garbage collection") {
+ val inputData = MemoryStream[Int]
+ val mapped = inputData.toDS().map(6 / _)
+
+ // Run 3 batches, and then assert that only 1 metadata file is left at
the end
+ // since the first 2 should have been purged.
+ testStream(mapped)(
+ AddData(inputData, 1, 2),
+ CheckAnswer(6, 3),
+ AddData(inputData, 1, 2),
+ CheckAnswer(6, 3, 6, 3),
+ AddData(inputData, 4, 6),
+ CheckAnswer(6, 3, 6, 3, 1, 1),
+
+ AssertOnQuery("metadata log should contain only one file") { q =>
+ val metadataLogDir = new
java.io.File(q.offsetLog.metadataPath.toString)
+ val logFileNames =
metadataLogDir.listFiles().toSeq.map(_.getName())
+ val toTest = logFileNames.filter(! _.endsWith(".crc")) //
Workaround for SPARK-17475
+ assert(toTest.size == 1 && toTest.head == "2")
+ true
--- End diff --
This line ("true") shouldn't be here. It makes the Assert always pass, even
when the condition on the previous line isn't satisfied.
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