Github user witgo commented on a diff in the pull request:
https://github.com/apache/spark/pull/5548#discussion_r28581367
--- Diff: core/src/test/scala/org/apache/spark/ContextCleanerSuite.scala ---
@@ -245,7 +245,7 @@ class ContextCleanerSuite extends
ContextCleanerSuiteBase {
assert(fs.exists(RDDCheckpointData.rddCheckpointDataPath(sc,
rddId).get))
// Test that GC causes checkpoint data cleanup after dereferencing the
RDD
- postGCTester = new CleanerTester(sc, Seq(rddId), Nil, Nil)
+ postGCTester = new CleanerTester(sc, Seq(rddId), Nil, Nil, Seq(rddId))
--- End diff --
@srowen This is just a test code bug. `new CleanerTester(sc, Seq(rddId),
Nil, Nil)` This code is only to ensure that the RDD is cleaned, but
checkpoint. rdd and checkpoint almost simultaneously be cleaned, But there are
exceptions, depending on the GC. The `checkpointCleaned ` ensure the
checkpoint is cleaned.
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