[SPARK-27404][CORE][SQL][STREAMING][YARN] Fix build warnings for 3.0: postfixOps edition

## What changes were proposed in this pull request?

Fix build warnings -- see some details below.

But mostly, remove use of postfix syntax where it causes warnings without the `scala.language.postfixOps` import. This is mostly in expressions like "120000 milliseconds". Which, I'd like to simplify to things like "2.minutes" anyway.

## How was this patch tested?

Existing tests.

Closes apache#24314 from srowen/SPARK-27404.

Authored-by: Sean Owen <[email protected]>
Signed-off-by: Sean Owen <[email protected]>

Author: srowen

common/network-shuffle/src/test/java/org/apache/spark/network/shuffle/RetryingBlockFetcherSuite.java

@@ -46,9 +46,9 @@
  */
 public class RetryingBlockFetcherSuite {
 
-  ManagedBuffer block0 = new NioManagedBuffer(ByteBuffer.wrap(new byte[13]));
-  ManagedBuffer block1 = new NioManagedBuffer(ByteBuffer.wrap(new byte[7]));
-  ManagedBuffer block2 = new NioManagedBuffer(ByteBuffer.wrap(new byte[19]));
+  private final ManagedBuffer block0 = new NioManagedBuffer(ByteBuffer.wrap(new byte[13]));
+  private final ManagedBuffer block1 = new NioManagedBuffer(ByteBuffer.wrap(new byte[7]));
+  private final ManagedBuffer block2 = new NioManagedBuffer(ByteBuffer.wrap(new byte[19]));
 
   @Test
   public void testNoFailures() throws IOException, InterruptedException {
@@ -291,7 +291,7 @@ private static void performInteractions(List<? extends Map<String, Object>> inte
     }
 
     assertNotNull(stub);
-    stub.when(fetchStarter).createAndStart(any(), anyObject());
+    stub.when(fetchStarter).createAndStart(any(), any());
     String[] blockIdArray = blockIds.toArray(new String[blockIds.size()]);
     new RetryingBlockFetcher(conf, fetchStarter, blockIdArray, listener).start();
   }

core/src/main/scala/org/apache/spark/BarrierTaskContext.scala

@@ -20,7 +20,6 @@ package org.apache.spark
 import java.util.{Properties, Timer, TimerTask}
 
 import scala.concurrent.duration._
-import scala.language.postfixOps
 
 import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.executor.TaskMetrics
@@ -122,7 +121,7 @@ class BarrierTaskContext private[spark] (
           barrierEpoch),
         // Set a fixed timeout for RPC here, so users shall get a SparkException thrown by
         // BarrierCoordinator on timeout, instead of RPCTimeoutException from the RPC framework.
-        timeout = new RpcTimeout(31536000 /* = 3600 * 24 * 365 */ seconds, "barrierTimeout"))
+        timeout = new RpcTimeout(365.days, "barrierTimeout"))
       barrierEpoch += 1
       logInfo(s"Task $taskAttemptId from Stage $stageId(Attempt $stageAttemptNumber) finished " +
         "global sync successfully, waited for " +

core/src/main/scala/org/apache/spark/deploy/FaultToleranceTest.scala

@@ -26,7 +26,6 @@ import scala.collection.mutable.ListBuffer
 import scala.concurrent.{Future, Promise}
 import scala.concurrent.ExecutionContext.Implicits.global
 import scala.concurrent.duration._
-import scala.language.postfixOps
 import scala.sys.process._
 
 import org.json4s._
@@ -112,7 +111,7 @@ private object FaultToleranceTest extends App with Logging {
     assertValidClusterState()
 
     killLeader()
-    delay(30 seconds)
+    delay(30.seconds)
     assertValidClusterState()
     createClient()
     assertValidClusterState()
@@ -126,12 +125,12 @@ private object FaultToleranceTest extends App with Logging {
 
     killLeader()
     addMasters(1)
-    delay(30 seconds)
+    delay(30.seconds)
     assertValidClusterState()
 
     killLeader()
     addMasters(1)
-    delay(30 seconds)
+    delay(30.seconds)
     assertValidClusterState()
   }
 
@@ -156,7 +155,7 @@ private object FaultToleranceTest extends App with Logging {
     killLeader()
     workers.foreach(_.kill())
     workers.clear()
-    delay(30 seconds)
+    delay(30.seconds)
     addWorkers(2)
     assertValidClusterState()
   }
@@ -174,7 +173,7 @@ private object FaultToleranceTest extends App with Logging {
 
     (1 to 3).foreach { _ =>
       killLeader()
-      delay(30 seconds)
+      delay(30.seconds)
       assertValidClusterState()
       assertTrue(getLeader == masters.head)
       addMasters(1)
@@ -264,7 +263,7 @@ private object FaultToleranceTest extends App with Logging {
     }
 
     // Avoid waiting indefinitely (e.g., we could register but get no executors).
-    assertTrue(ThreadUtils.awaitResult(f, 120 seconds))
+    assertTrue(ThreadUtils.awaitResult(f, 2.minutes))
   }
 
   /**
@@ -317,7 +316,7 @@ private object FaultToleranceTest extends App with Logging {
     }
 
     try {
-      assertTrue(ThreadUtils.awaitResult(f, 120 seconds))
+      assertTrue(ThreadUtils.awaitResult(f, 2.minutes))
     } catch {
       case e: TimeoutException =>
         logError("Master states: " + masters.map(_.state))
@@ -421,7 +420,7 @@ private object SparkDocker {
     }
 
     dockerCmd.run(ProcessLogger(findIpAndLog _))
-    val ip = ThreadUtils.awaitResult(ipPromise.future, 30 seconds)
+    val ip = ThreadUtils.awaitResult(ipPromise.future, 30.seconds)
     val dockerId = Docker.getLastProcessId
     (ip, dockerId, outFile)
   }

core/src/main/scala/org/apache/spark/rpc/RpcTimeout.scala

@@ -52,7 +52,7 @@ private[spark] class RpcTimeout(val duration: FiniteDuration, val timeoutProp: S
    *
    * @note This can be used in the recover callback of a Future to add to a TimeoutException
    * Example:
-   *    val timeout = new RpcTimeout(5 millis, "short timeout")
+   *    val timeout = new RpcTimeout(5.milliseconds, "short timeout")
    *    Future(throw new TimeoutException).recover(timeout.addMessageIfTimeout)
    */
   def addMessageIfTimeout[T]: PartialFunction[Throwable, T] = {

core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala

@@ -27,7 +27,6 @@ import scala.collection.Map
 import scala.collection.mutable.{ArrayStack, HashMap, HashSet}
 import scala.concurrent.duration._
 import scala.language.existentials
-import scala.language.postfixOps
 import scala.util.control.NonFatal
 
 import org.apache.commons.lang3.SerializationUtils
@@ -270,7 +269,7 @@ private[spark] class DAGScheduler(
     listenerBus.post(SparkListenerExecutorMetricsUpdate(execId, accumUpdates,
       Some(executorUpdates)))
     blockManagerMaster.driverEndpoint.askSync[Boolean](
-      BlockManagerHeartbeat(blockManagerId), new RpcTimeout(600 seconds, "BlockManagerHeartbeat"))
+      BlockManagerHeartbeat(blockManagerId), new RpcTimeout(10.minutes, "BlockManagerHeartbeat"))
   }
 
   /**

core/src/main/scala/org/apache/spark/ui/UIUtils.scala

@@ -109,12 +109,12 @@ private[spark] object UIUtils extends Logging {
         }
       }
       // if time is more than a year
-      return s"$yearString $weekString $dayString"
+      s"$yearString $weekString $dayString"
     } catch {
       case e: Exception =>
         logError("Error converting time to string", e)
         // if there is some error, return blank string
-        return ""
+        ""
     }
   }
 
@@ -336,7 +336,7 @@ private[spark] object UIUtils extends Logging {
     def getHeaderContent(header: String): Seq[Node] = {
       if (newlinesInHeader) {
         <ul class="unstyled">
-          { header.split("\n").map { case t => <li> {t} </li> } }
+          { header.split("\n").map(t => <li> {t} </li>) }
         </ul>
       } else {
         Text(header)
@@ -446,7 +446,7 @@ private[spark] object UIUtils extends Logging {
    * the whole string will rendered as a simple escaped text.
    *
    * Note: In terms of security, only anchor tags with root relative links are supported. So any
-   * attempts to embed links outside Spark UI, or other tags like {@code <script>} will cause in
+   * attempts to embed links outside Spark UI, or other tags like &lt;script&gt; will cause in
    * the whole description to be treated as plain text.
    *
    * @param desc        the original job or stage description string, which may contain html tags.
@@ -458,7 +458,6 @@ private[spark] object UIUtils extends Logging {
    *         is true, and an Elem otherwise.
    */
   def makeDescription(desc: String, basePathUri: String, plainText: Boolean = false): NodeSeq = {
-    import scala.language.postfixOps
 
     // If the description can be parsed as HTML and has only relative links, then render
     // as HTML, otherwise render as escaped string
@@ -468,9 +467,7 @@ private[spark] object UIUtils extends Logging {
 
       // Verify that this has only anchors and span (we are wrapping in span)
       val allowedNodeLabels = Set("a", "span", "br")
-      val illegalNodes = xml \\ "_"  filterNot { case node: Node =>
-        allowedNodeLabels.contains(node.label)
-      }
+      val illegalNodes = (xml \\ "_").filterNot(node => allowedNodeLabels.contains(node.label))
       if (illegalNodes.nonEmpty) {
         throw new IllegalArgumentException(
           "Only HTML anchors allowed in job descriptions\n" +
@@ -491,8 +488,8 @@ private[spark] object UIUtils extends Logging {
           new RewriteRule() {
             override def transform(n: Node): Seq[Node] = {
               n match {
-                case e: Elem if e.child isEmpty => Text(e.text)
-                case e: Elem if e.child nonEmpty => Text(e.child.flatMap(transform).text)
+                case e: Elem if e.child.isEmpty => Text(e.text)
+                case e: Elem => Text(e.child.flatMap(transform).text)
                 case _ => n
               }
             }
@@ -503,7 +500,7 @@ private[spark] object UIUtils extends Logging {
           new RewriteRule() {
             override def transform(n: Node): Seq[Node] = {
               n match {
-                case e: Elem if e \ "@href" nonEmpty =>
+                case e: Elem if (e \ "@href").nonEmpty =>
                   val relativePath = e.attribute("href").get.toString
                   val fullUri = s"${basePathUri.stripSuffix("/")}/${relativePath.stripPrefix("/")}"
                   e % Attribute(null, "href", fullUri, Null)

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

@@ -18,7 +18,6 @@
 package org.apache.spark
 
 import scala.concurrent.duration._
-import scala.language.postfixOps
 
 import org.apache.spark.internal.config._
 import org.apache.spark.rdd.{PartitionPruningRDD, RDD}
@@ -52,7 +51,7 @@ class BarrierStageOnSubmittedSuite extends SparkFunSuite with LocalSparkContext
     )
 
     val error = intercept[SparkException] {
-      ThreadUtils.awaitResult(futureAction, 5 seconds)
+      ThreadUtils.awaitResult(futureAction, 5.seconds)
     }.getCause.getMessage
     assert(error.contains(message))
   }

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

@@ -43,7 +43,7 @@ import org.apache.spark.storage._
 abstract class ContextCleanerSuiteBase(val shuffleManager: Class[_] = classOf[SortShuffleManager])
   extends SparkFunSuite with BeforeAndAfter with LocalSparkContext
 {
-  implicit val defaultTimeout = timeout(10000 millis)
+  implicit val defaultTimeout = timeout(10.seconds)
   val conf = new SparkConf()
     .setMaster("local[2]")
     .setAppName("ContextCleanerSuite")
@@ -159,7 +159,7 @@ class ContextCleanerSuite extends ContextCleanerSuiteBase {
     val preGCTester = new CleanerTester(sc, rddIds = Seq(rdd.id))
     runGC()
     intercept[Exception] {
-      preGCTester.assertCleanup()(timeout(1000 millis))
+      preGCTester.assertCleanup()(timeout(1.second))
     }
 
     // Test that GC causes RDD cleanup after dereferencing the RDD
@@ -178,7 +178,7 @@ class ContextCleanerSuite extends ContextCleanerSuiteBase {
     val preGCTester = new CleanerTester(sc, shuffleIds = Seq(0))
     runGC()
     intercept[Exception] {
-      preGCTester.assertCleanup()(timeout(1000 millis))
+      preGCTester.assertCleanup()(timeout(1.second))
     }
     rdd.count()  // Defeat early collection by the JVM
 
@@ -196,7 +196,7 @@ class ContextCleanerSuite extends ContextCleanerSuiteBase {
     val preGCTester = new CleanerTester(sc, broadcastIds = Seq(broadcast.id))
     runGC()
     intercept[Exception] {
-      preGCTester.assertCleanup()(timeout(1000 millis))
+      preGCTester.assertCleanup()(timeout(1.second))
     }
 
     // Test that GC causes broadcast cleanup after dereferencing the broadcast variable
@@ -272,7 +272,7 @@ class ContextCleanerSuite extends ContextCleanerSuiteBase {
     val preGCTester = new CleanerTester(sc, rddIds = Seq(rdd.id))
     runGC()
     intercept[Exception] {
-      preGCTester.assertCleanup()(timeout(1000 millis))
+      preGCTester.assertCleanup()(timeout(1.second))
     }
 
     // Test that RDD going out of scope does cause the checkpoint blocks to be cleaned up
@@ -294,7 +294,7 @@ class ContextCleanerSuite extends ContextCleanerSuiteBase {
     val preGCTester = new CleanerTester(sc, rddIds, shuffleIds, broadcastIds)
     runGC()
     intercept[Exception] {
-      preGCTester.assertCleanup()(timeout(1000 millis))
+      preGCTester.assertCleanup()(timeout(1.second))
     }
 
     // Test that GC triggers the cleanup of all variables after the dereferencing them
@@ -334,7 +334,7 @@ class ContextCleanerSuite extends ContextCleanerSuiteBase {
     val preGCTester = new CleanerTester(sc, rddIds, shuffleIds, broadcastIds)
     runGC()
     intercept[Exception] {
-      preGCTester.assertCleanup()(timeout(1000 millis))
+      preGCTester.assertCleanup()(timeout(1.second))
     }
 
     // Test that GC triggers the cleanup of all variables after the dereferencing them
@@ -408,7 +408,7 @@ class CleanerTester(
   /** Assert that all the stuff has been cleaned up */
   def assertCleanup()(implicit waitTimeout: PatienceConfiguration.Timeout) {
     try {
-      eventually(waitTimeout, interval(100 millis)) {
+      eventually(waitTimeout, interval(100.milliseconds)) {
         assert(isAllCleanedUp,
           "The following resources were not cleaned up:\n" + uncleanedResourcesToString)
       }

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

@@ -33,12 +33,12 @@ class DriverSuite extends SparkFunSuite with TimeLimits {
   ignore("driver should exit after finishing without cleanup (SPARK-530)") {
     val sparkHome = sys.props.getOrElse("spark.test.home", fail("spark.test.home is not set!"))
     val masters = Table("master", "local", "local-cluster[2,1,1024]")
-    forAll(masters) { (master: String) =>
+    forAll(masters) { master =>
       val process = Utils.executeCommand(
         Seq(s"$sparkHome/bin/spark-class", "org.apache.spark.DriverWithoutCleanup", master),
         new File(sparkHome),
         Map("SPARK_TESTING" -> "1", "SPARK_HOME" -> sparkHome))
-      failAfter(60 seconds) { process.waitFor() }
+      failAfter(1.minute) { process.waitFor() }
       // Ensure we still kill the process in case it timed out
       process.destroy()
     }

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

@@ -250,7 +250,7 @@ class JobCancellationSuite extends SparkFunSuite with Matchers with BeforeAndAft
     assert(e.getMessage contains "cancel")
 
     // Once A is cancelled, job B should finish fairly quickly.
-    assert(ThreadUtils.awaitResult(jobB, 60.seconds) === 100)
+    assert(ThreadUtils.awaitResult(jobB, 1.minute) === 100)
   }
 
   test("task reaper will not kill JVM if spark.task.killTimeout == -1") {
@@ -290,7 +290,7 @@ class JobCancellationSuite extends SparkFunSuite with Matchers with BeforeAndAft
     assert(e.getMessage contains "cancel")
 
     // Once A is cancelled, job B should finish fairly quickly.
-    assert(ThreadUtils.awaitResult(jobB, 60.seconds) === 100)
+    assert(ThreadUtils.awaitResult(jobB, 1.minute) === 100)
   }
 
   test("two jobs sharing the same stage") {