[SPARK-14914][CORE] Fix Resource not closed after using, mostly for unit tests

core/src/main/scala/org/apache/spark/rdd/ReliableCheckpointRDD.scala

@@ -239,7 +239,14 @@ private[spark] object ReliableCheckpointRDD extends Logging {
       val fs = partitionerFilePath.getFileSystem(sc.hadoopConfiguration)
       val fileInputStream = fs.open(partitionerFilePath, bufferSize)
       val serializer = SparkEnv.get.serializer.newInstance()
-      val deserializeStream = serializer.deserializeStream(fileInputStream)
+      val deserializeStream = try {
+        serializer.deserializeStream(fileInputStream)
+      } catch {
+        case e : Throwable =>
+          fileInputStream.close()
+          throw e
+      }
+
       val partitioner = Utils.tryWithSafeFinally[Partitioner] {
         deserializeStream.readObject[Partitioner]
       } {

core/src/test/scala/org/apache/spark/FileSuite.scala

@@ -58,10 +58,15 @@ class FileSuite extends SparkFunSuite with LocalSparkContext {
     nums.saveAsTextFile(outputDir)
     // Read the plain text file and check it's OK
     val outputFile = new File(outputDir, "part-00000")
-    val content = Source.fromFile(outputFile).mkString
-    assert(content === "1\n2\n3\n4\n")
-    // Also try reading it in as a text file RDD
-    assert(sc.textFile(outputDir).collect().toList === List("1", "2", "3", "4"))
+    val bufferSrc = Source.fromFile(outputFile)
+    try {
+      val content = bufferSrc.mkString
+      assert(content === "1\n2\n3\n4\n")
+      // Also try reading it in as a text file RDD
+      assert(sc.textFile(outputDir).collect().toList === List("1", "2", "3", "4"))
+    } finally {
+      bufferSrc.close()
+    }
   }
 
   test("text files (compressed)") {

core/src/test/scala/org/apache/spark/deploy/RPackageUtilsSuite.scala

@@ -77,6 +77,7 @@ class RPackageUtilsSuite
       assert(RPackageUtils.checkManifestForR(jars(0)), "should have R code")
       assert(!RPackageUtils.checkManifestForR(jars(1)), "should not have R code")
       assert(!RPackageUtils.checkManifestForR(jars(2)), "should not have R code")
+      jars.foreach(_.close())
     }
   }
 
@@ -144,13 +145,15 @@ class RPackageUtilsSuite
       IvyTestUtils.writeFile(fakePackageDir, "DESCRIPTION", "abc")
       val finalZip = RPackageUtils.zipRLibraries(tempDir, "sparkr.zip")
       assert(finalZip.exists())
-      val entries = new ZipFile(finalZip).entries().asScala.map(_.getName).toSeq
+      val zipFile = new ZipFile(finalZip)
+      val entries = zipFile.entries().asScala.map(_.getName).toSeq
       assert(entries.contains("/test.R"))
       assert(entries.contains("/SparkR/abc.R"))
       assert(entries.contains("/SparkR/DESCRIPTION"))
       assert(!entries.contains("/package.zip"))
       assert(entries.contains("/packageTest/def.R"))
       assert(entries.contains("/packageTest/DESCRIPTION"))
+      zipFile.close()
     } finally {
       FileUtils.deleteDirectory(tempDir)
     }

core/src/test/scala/org/apache/spark/deploy/history/FsHistoryProviderSuite.scala

@@ -449,8 +449,14 @@ class FsHistoryProviderSuite extends SparkFunSuite with BeforeAndAfter with Matc
     val cstream = codec.map(_.compressedOutputStream(fstream)).getOrElse(fstream)
     val bstream = new BufferedOutputStream(cstream)
     if (isNewFormat) {
-      EventLoggingListener.initEventLog(new FileOutputStream(file))
+      val newFormatStream = new FileOutputStream(file)
+      Utils.tryWithSafeFinally {
+        EventLoggingListener.initEventLog(newFormatStream)
+      } {
+        newFormatStream.close()
+      }
     }
+
     val writer = new OutputStreamWriter(bstream, StandardCharsets.UTF_8)
     Utils.tryWithSafeFinally {
       events.foreach(e => writer.write(compact(render(JsonProtocol.sparkEventToJson(e))) + "\n"))

core/src/test/scala/org/apache/spark/scheduler/EventLoggingListenerSuite.scala

@@ -202,8 +202,6 @@ class EventLoggingListenerSuite extends SparkFunSuite with LocalSparkContext wit
 
     // Make sure expected events exist in the log file.
     val logData = EventLoggingListener.openEventLog(new Path(eventLogger.logPath), fileSystem)
-    val logStart = SparkListenerLogStart(SPARK_VERSION)
-    val lines = readLines(logData)
     val eventSet = mutable.Set(
       SparkListenerApplicationStart,
       SparkListenerBlockManagerAdded,
@@ -216,19 +214,25 @@ class EventLoggingListenerSuite extends SparkFunSuite with LocalSparkContext wit
       SparkListenerTaskStart,
       SparkListenerTaskEnd,
       SparkListenerApplicationEnd).map(Utils.getFormattedClassName)
-    lines.foreach { line =>
-      eventSet.foreach { event =>
-        if (line.contains(event)) {
-          val parsedEvent = JsonProtocol.sparkEventFromJson(parse(line))
-          val eventType = Utils.getFormattedClassName(parsedEvent)
-          if (eventType == event) {
-            eventSet.remove(event)
+    try {
+      val logStart = SparkListenerLogStart(SPARK_VERSION)
+      val lines = readLines(logData)
+      lines.foreach { line =>
+        eventSet.foreach { event =>
+          if (line.contains(event)) {
+            val parsedEvent = JsonProtocol.sparkEventFromJson(parse(line))
+            val eventType = Utils.getFormattedClassName(parsedEvent)
+            if (eventType == event) {
+              eventSet.remove(event)
+            }
           }
         }
       }
+      assert(JsonProtocol.sparkEventFromJson(parse(lines(0))) === logStart)
+      assert(eventSet.isEmpty, "The following events are missing: " + eventSet.toSeq)
+    } finally {
+      logData.close()
     }
-    assert(JsonProtocol.sparkEventFromJson(parse(lines(0))) === logStart)
-    assert(eventSet.isEmpty, "The following events are missing: " + eventSet.toSeq)
   }
 
   private def readLines(in: InputStream): Seq[String] = {

core/src/test/scala/org/apache/spark/scheduler/TaskResultGetterSuite.scala

@@ -183,9 +183,9 @@ class TaskResultGetterSuite extends SparkFunSuite with BeforeAndAfter with Local
 
     // ensure we reset the classloader after the test completes
     val originalClassLoader = Thread.currentThread.getContextClassLoader
+    val loader = new MutableURLClassLoader(new Array[URL](0), originalClassLoader)
     try {
       // load the exception from the jar
-      val loader = new MutableURLClassLoader(new Array[URL](0), originalClassLoader)
       loader.addURL(jarFile.toURI.toURL)
       Thread.currentThread().setContextClassLoader(loader)
       val excClass: Class[_] = Utils.classForName("repro.MyException")
@@ -210,6 +210,7 @@ class TaskResultGetterSuite extends SparkFunSuite with BeforeAndAfter with Local
       assert(expectedFailure.findFirstMatchIn(exceptionMessage).isDefined)
       assert(unknownFailure.findFirstMatchIn(exceptionMessage).isEmpty)
     } finally {
+      loader.close()
       Thread.currentThread.setContextClassLoader(originalClassLoader)
     }
   }

mllib/src/test/scala/org/apache/spark/mllib/util/MLUtilsSuite.scala

@@ -155,12 +155,14 @@ class MLUtilsSuite extends SparkFunSuite with MLlibTestSparkContext {
     val tempDir = Utils.createTempDir()
     val outputDir = new File(tempDir, "output")
     MLUtils.saveAsLibSVMFile(examples, outputDir.toURI.toString)
-    val lines = outputDir.listFiles()
+    val sources = outputDir.listFiles()
       .filter(_.getName.startsWith("part-"))
-      .flatMap(Source.fromFile(_).getLines())
-      .toSet
+      .map(Source.fromFile)
+
+    val lines = sources.flatMap(_.getLines()).toSet
     val expected = Set("1.1 1:1.23 3:4.56", "0.0 1:1.01 2:2.02 3:3.03")
     assert(lines === expected)
+    sources.foreach(_.close())
     Utils.deleteRecursively(tempDir)
   }
 

streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala

@@ -194,10 +194,13 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
       // Finally, stop the endpoint
       ssc.env.rpcEnv.stop(endpoint)
       endpoint = null
-      receivedBlockTracker.stop()
       logInfo("ReceiverTracker stopped")
       trackerState = Stopped
     }
+
+    // note that the output writer is created at construction time, we have to close
+    // them even if it hasn't been started.
+    receivedBlockTracker.stop()
   }
 
   /** Allocate all unallocated blocks to the given batch. */

streaming/src/test/java/org/apache/spark/streaming/JavaAPISuite.java

@@ -1805,6 +1805,7 @@ public Integer call(String s) {
     // will be re-processed after recovery
     List<List<Integer>> finalResult = JavaCheckpointTestUtils.runStreams(ssc, 2, 3);
     assertOrderInvariantEquals(expectedFinal, finalResult.subList(1, 3));
+    ssc.stop();
     Utils.deleteRecursively(tempDir);
   }
 

streaming/src/test/scala/org/apache/spark/streaming/CheckpointSuite.scala

@@ -642,16 +642,18 @@ class CheckpointSuite extends TestSuiteBase with DStreamCheckpointTester
         val fileStream = ssc.textFileStream(testDir.toString)
         // Make value 3 take a large time to process, to ensure that the driver
         // shuts down in the middle of processing the 3rd batch
-        CheckpointSuite.batchThreeShouldBlockIndefinitely = true
-        val mappedStream = fileStream.map(s => {
+        CheckpointSuite.batchThreeShouldBlockALongTime = true
+        val mappedStream = fileStream.map{ s =>
           val i = s.toInt
           if (i == 3) {
-            while (CheckpointSuite.batchThreeShouldBlockIndefinitely) {
-              Thread.sleep(Long.MaxValue)
+            if (CheckpointSuite.batchThreeShouldBlockALongTime) {
+              // It's not a good idea to let the thread run forever
+              // as resource won't be correctly released
+              Thread.sleep(6000)
             }
           }
           i
-        })
+        }
 
         // Reducing over a large window to ensure that recovery from driver failure
         // requires reprocessing of all the files seen before the failure
@@ -691,7 +693,7 @@ class CheckpointSuite extends TestSuiteBase with DStreamCheckpointTester
       }
 
       // The original StreamingContext has now been stopped.
-      CheckpointSuite.batchThreeShouldBlockIndefinitely = false
+      CheckpointSuite.batchThreeShouldBlockALongTime = false
 
       // Create files while the streaming driver is down
       for (i <- Seq(4, 5, 6)) {
@@ -928,5 +930,5 @@ class CheckpointSuite extends TestSuiteBase with DStreamCheckpointTester
 }
 
 private object CheckpointSuite extends Serializable {
-  var batchThreeShouldBlockIndefinitely: Boolean = true
+  var batchThreeShouldBlockALongTime: Boolean = true
 }

streaming/src/test/scala/org/apache/spark/streaming/MapWithStateSuite.scala

@@ -38,19 +38,16 @@ class MapWithStateSuite extends SparkFunSuite
   protected val batchDuration = Seconds(1)
 
   before {
-    StreamingContext.getActive().foreach { _.stop(stopSparkContext = false) }
-    checkpointDir = Utils.createTempDir("checkpoint")
+    StreamingContext.getActive().foreach(_.stop(stopSparkContext = false))
   }
 
   after {
-    StreamingContext.getActive().foreach { _.stop(stopSparkContext = false) }
-    if (checkpointDir != null) {
-      Utils.deleteRecursively(checkpointDir)
-    }
+    StreamingContext.getActive().foreach(_.stop(stopSparkContext = false))
   }
 
   override def beforeAll(): Unit = {
     super.beforeAll()
+    checkpointDir = Utils.createTempDir("checkpoint")
     val conf = new SparkConf().setMaster("local").setAppName("MapWithStateSuite")
     conf.set("spark.streaming.clock", classOf[ManualClock].getName())
     sc = new SparkContext(conf)
@@ -63,6 +60,7 @@ class MapWithStateSuite extends SparkFunSuite
       }
     } finally {
       super.afterAll()
+      Utils.deleteRecursively(checkpointDir)
     }
   }
 

streaming/src/test/scala/org/apache/spark/streaming/MasterFailureTest.scala

@@ -164,6 +164,7 @@ object MasterFailureTest extends Logging {
     val mergedOutput = runStreams(ssc, lastExpectedOutput, maxTimeToRun)
 
     fileGeneratingThread.join()
+    ssc.stop()
     fs.delete(checkpointDir, true)
     fs.delete(testDir, true)
     logInfo("Finished test after " + killCount + " failures")

streaming/src/test/scala/org/apache/spark/streaming/ReceivedBlockTrackerSuite.scala

@@ -134,13 +134,15 @@ class ReceivedBlockTrackerSuite
     val expectedWrittenData1 = blockInfos1.map(BlockAdditionEvent)
     getWrittenLogData() shouldEqual expectedWrittenData1
     getWriteAheadLogFiles() should have size 1
+    tracker1.stop()
 
     incrementTime()
 
     // Recovery without recovery from WAL and verify list of unallocated blocks is empty
     val tracker1_ = createTracker(clock = manualClock, recoverFromWriteAheadLog = false)
     tracker1_.getUnallocatedBlocks(streamId) shouldBe empty
     tracker1_.hasUnallocatedReceivedBlocks should be (false)
+    tracker1_.stop()
 
     // Restart tracker and verify recovered list of unallocated blocks
     val tracker2 = createTracker(clock = manualClock, recoverFromWriteAheadLog = true)
@@ -163,6 +165,7 @@ class ReceivedBlockTrackerSuite
     val blockInfos2 = addBlockInfos(tracker2)
     tracker2.allocateBlocksToBatch(batchTime2)
     tracker2.getBlocksOfBatchAndStream(batchTime2, streamId) shouldEqual blockInfos2
+    tracker2.stop()
 
     // Verify whether log has correct contents
     val expectedWrittenData2 = expectedWrittenData1 ++
@@ -192,6 +195,7 @@ class ReceivedBlockTrackerSuite
       getWriteAheadLogFiles() should not contain oldestLogFile
     }
     printLogFiles("After clean")
+    tracker3.stop()
 
     // Restart tracker and verify recovered state, specifically whether info about the first
     // batch has been removed, but not the second batch
@@ -200,6 +204,7 @@ class ReceivedBlockTrackerSuite
     tracker4.getUnallocatedBlocks(streamId) shouldBe empty
     tracker4.getBlocksOfBatchAndStream(batchTime1, streamId) shouldBe empty  // should be cleaned
     tracker4.getBlocksOfBatchAndStream(batchTime2, streamId) shouldEqual blockInfos2
+    tracker4.stop()
   }
 
   test("disable write ahead log when checkpoint directory is not set") {

streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala

@@ -139,6 +139,7 @@ abstract class CommonWriteAheadLogTests(
         assert(getLogFilesInDirectory(testDir).size < logFiles.size)
       }
     }
+    writeAheadLog.close()
   }
 
   test(testPrefix + "handling file errors while reading rotating logs") {