Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/19805#discussion_r157361491 --- Diff: sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala --- @@ -1156,67 +1156,83 @@ class DatasetSuite extends QueryTest with SharedSQLContext { } Seq(true, false).foreach { eager => - def testCheckpointing(testName: String)(f: => Unit): Unit = { - test(s"Dataset.checkpoint() - $testName (eager = $eager)") { - withTempDir { dir => - val originalCheckpointDir = spark.sparkContext.checkpointDir - - try { - spark.sparkContext.setCheckpointDir(dir.getCanonicalPath) + Seq(true, false).foreach { reliable => + def testCheckpointing(testName: String)(f: => Unit): Unit = { + test(s"Dataset.checkpoint() - $testName (eager = $eager, reliable = $reliable)") { + if (reliable) { + withTempDir { dir => + val originalCheckpointDir = spark.sparkContext.checkpointDir + + try { + spark.sparkContext.setCheckpointDir(dir.getCanonicalPath) + f + } finally { + // Since the original checkpointDir can be None, we need + // to set the variable directly. + spark.sparkContext.checkpointDir = originalCheckpointDir + } + } + } + else { --- End diff -- -> `} else {`
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