merge master

Author: mengxr

bin/spark-class

@@ -105,7 +105,7 @@ else
     exit 1
   fi
 fi
-JAVA_VERSION=$("$RUNNER" -version 2>&1 | sed 's/.* version "\(.*\)\.\(.*\)\..*"/\1\2/; 1q')
+JAVA_VERSION=$("$RUNNER" -version 2>&1 | grep 'version' | sed 's/.* version "\(.*\)\.\(.*\)\..*"/\1\2/; 1q')
 
 # Set JAVA_OPTS to be able to load native libraries and to set heap size
 if [ "$JAVA_VERSION" -ge 18 ]; then

core/src/main/scala/org/apache/spark/deploy/worker/ExecutorRunner.scala

@@ -111,13 +111,14 @@ private[spark] class ExecutorRunner(
     case "{{EXECUTOR_ID}}" => execId.toString
     case "{{HOSTNAME}}" => host
     case "{{CORES}}" => cores.toString
+    case "{{APP_ID}}" => appId
     case other => other
   }
 
   def getCommandSeq = {
     val command = Command(
       appDesc.command.mainClass,
-      appDesc.command.arguments.map(substituteVariables) ++ Seq(appId),
+      appDesc.command.arguments.map(substituteVariables),
       appDesc.command.environment,
       appDesc.command.classPathEntries,
       appDesc.command.libraryPathEntries,

core/src/main/scala/org/apache/spark/deploy/worker/WorkerArguments.scala

@@ -41,8 +41,8 @@ private[spark] class WorkerArguments(args: Array[String], conf: SparkConf) {
   if (System.getenv("SPARK_WORKER_CORES") != null) {
     cores = System.getenv("SPARK_WORKER_CORES").toInt
   }
-  if (System.getenv("SPARK_WORKER_MEMORY") != null) {
-    memory = Utils.memoryStringToMb(System.getenv("SPARK_WORKER_MEMORY"))
+  if (conf.getenv("SPARK_WORKER_MEMORY") != null) {
+    memory = Utils.memoryStringToMb(conf.getenv("SPARK_WORKER_MEMORY"))
   }
   if (System.getenv("SPARK_WORKER_WEBUI_PORT") != null) {
     webUiPort = System.getenv("SPARK_WORKER_WEBUI_PORT").toInt
@@ -56,6 +56,8 @@ private[spark] class WorkerArguments(args: Array[String], conf: SparkConf) {
 
   parse(args.toList)
 
+  checkWorkerMemory()
+
   def parse(args: List[String]): Unit = args match {
     case ("--ip" | "-i") :: value :: tail =>
       Utils.checkHost(value, "ip no longer supported, please use hostname " + value)
@@ -153,4 +155,11 @@ private[spark] class WorkerArguments(args: Array[String], conf: SparkConf) {
     // Leave out 1 GB for the operating system, but don't return a negative memory size
     math.max(totalMb - 1024, 512)
   }
+
+  def checkWorkerMemory(): Unit = {
+    if (memory <= 0) {
+      val message = "Memory can't be 0, missing a M or G on the end of the memory specification?"
+      throw new IllegalStateException(message)
+    }
+  }
 }

core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala

@@ -152,6 +152,9 @@ private[spark] object CoarseGrainedExecutorBackend extends Logging {
           "Usage: CoarseGrainedExecutorBackend <driverUrl> <executorId> <hostname> " +
           "<cores> <appid> [<workerUrl>] ")
         System.exit(1)
+
+      // NB: These arguments are provided by SparkDeploySchedulerBackend (for standalone mode)
+      // and CoarseMesosSchedulerBackend (for mesos mode).
       case 5 =>
         run(args(0), args(1), args(2), args(3).toInt, args(4), None)
       case x if x > 5 =>

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

@@ -78,16 +78,18 @@ class AsyncRDDActions[T: ClassTag](self: RDD[T]) extends Serializable with Loggi
         // greater than totalParts because we actually cap it at totalParts in runJob.
         var numPartsToTry = 1
         if (partsScanned > 0) {
-          // If we didn't find any rows after the first iteration, just try all partitions next.
+          // If we didn't find any rows after the previous iteration, quadruple and retry.
           // Otherwise, interpolate the number of partitions we need to try, but overestimate it
-          // by 50%.
+          // by 50%. We also cap the estimation in the end.
           if (results.size == 0) {
-            numPartsToTry = totalParts - 1
+            numPartsToTry = partsScanned * 4
           } else {
-            numPartsToTry = (1.5 * num * partsScanned / results.size).toInt
+            // the left side of max is >=1 whenever partsScanned >= 2
+            numPartsToTry = Math.max(1, 
+              (1.5 * num * partsScanned / results.size).toInt - partsScanned)
+            numPartsToTry = Math.min(numPartsToTry, partsScanned * 4) 
           }
         }
-        numPartsToTry = math.max(0, numPartsToTry)  // guard against negative num of partitions
 
         val left = num - results.size
         val p = partsScanned until math.min(partsScanned + numPartsToTry, totalParts)

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

@@ -1079,15 +1079,17 @@ abstract class RDD[T: ClassTag](
       // greater than totalParts because we actually cap it at totalParts in runJob.
       var numPartsToTry = 1
       if (partsScanned > 0) {
-        // If we didn't find any rows after the previous iteration, quadruple and retry.  Otherwise,
+        // If we didn't find any rows after the previous iteration, quadruple and retry. Otherwise,
         // interpolate the number of partitions we need to try, but overestimate it by 50%.
+        // We also cap the estimation in the end.
         if (buf.size == 0) {
           numPartsToTry = partsScanned * 4
         } else {
-          numPartsToTry = (1.5 * num * partsScanned / buf.size).toInt
+          // the left side of max is >=1 whenever partsScanned >= 2
+          numPartsToTry = Math.max((1.5 * num * partsScanned / buf.size).toInt - partsScanned, 1)
+          numPartsToTry = Math.min(numPartsToTry, partsScanned * 4) 
         }
       }
-      numPartsToTry = math.max(0, numPartsToTry)  // guard against negative num of partitions
 
       val left = num - buf.size
       val p = partsScanned until math.min(partsScanned + numPartsToTry, totalParts)

core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala

@@ -51,7 +51,8 @@ private[spark] class SparkDeploySchedulerBackend(
       conf.get("spark.driver.host"),
       conf.get("spark.driver.port"),
       CoarseGrainedSchedulerBackend.ACTOR_NAME)
-    val args = Seq(driverUrl, "{{EXECUTOR_ID}}", "{{HOSTNAME}}", "{{CORES}}", "{{WORKER_URL}}")
+    val args = Seq(driverUrl, "{{EXECUTOR_ID}}", "{{HOSTNAME}}", "{{CORES}}", "{{APP_ID}}",
+      "{{WORKER_URL}}")
     val extraJavaOpts = sc.conf.getOption("spark.executor.extraJavaOptions")
       .map(Utils.splitCommandString).getOrElse(Seq.empty)
     val classPathEntries = sc.conf.getOption("spark.executor.extraClassPath").toSeq.flatMap { cp =>

core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/CoarseMesosSchedulerBackend.scala

@@ -150,17 +150,17 @@ private[spark] class CoarseMesosSchedulerBackend(
     if (uri == null) {
       val runScript = new File(executorSparkHome, "./bin/spark-class").getCanonicalPath
       command.setValue(
-        "\"%s\" org.apache.spark.executor.CoarseGrainedExecutorBackend %s %s %s %d".format(
-          runScript, driverUrl, offer.getSlaveId.getValue, offer.getHostname, numCores))
+        "\"%s\" org.apache.spark.executor.CoarseGrainedExecutorBackend %s %s %s %d %s".format(
+          runScript, driverUrl, offer.getSlaveId.getValue, offer.getHostname, numCores, appId))
     } else {
       // Grab everything to the first '.'. We'll use that and '*' to
       // glob the directory "correctly".
       val basename = uri.split('/').last.split('.').head
       command.setValue(
         ("cd %s*; " +
-          "./bin/spark-class org.apache.spark.executor.CoarseGrainedExecutorBackend %s %s %s %d")
+          "./bin/spark-class org.apache.spark.executor.CoarseGrainedExecutorBackend %s %s %s %d %s")
           .format(basename, driverUrl, offer.getSlaveId.getValue,
-            offer.getHostname, numCores))
+            offer.getHostname, numCores, appId))
       command.addUris(CommandInfo.URI.newBuilder().setValue(uri))
     }
     command.build()

core/src/main/scala/org/apache/spark/util/Utils.scala

@@ -340,8 +340,8 @@ private[spark] object Utils extends Logging {
     val targetFile = new File(targetDir, filename)
     val uri = new URI(url)
     val fileOverwrite = conf.getBoolean("spark.files.overwrite", defaultValue = false)
-    uri.getScheme match {
-      case "http" | "https" | "ftp" =>
+    Option(uri.getScheme) match {
+      case Some("http") | Some("https") | Some("ftp") =>
         logInfo("Fetching " + url + " to " + tempFile)
 
         var uc: URLConnection = null
@@ -374,7 +374,7 @@ private[spark] object Utils extends Logging {
           }
         }
         Files.move(tempFile, targetFile)
-      case "file" | null =>
+      case Some("file") | None =>
         // In the case of a local file, copy the local file to the target directory.
         // Note the difference between uri vs url.
         val sourceFile = if (uri.isAbsolute) new File(uri) else new File(url)
@@ -403,7 +403,7 @@ private[spark] object Utils extends Logging {
           logInfo("Copying " + sourceFile.getAbsolutePath + " to " + targetFile.getAbsolutePath)
           Files.copy(sourceFile, targetFile)
         }
-      case _ =>
+      case Some(other) =>
         // Use the Hadoop filesystem library, which supports file://, hdfs://, s3://, and others
         val fs = getHadoopFileSystem(uri, hadoopConf)
         val in = fs.open(new Path(uri))
@@ -1368,16 +1368,17 @@ private[spark] object Utils extends Logging {
     if (uri.getPath == null) {
       throw new IllegalArgumentException(s"Given path is malformed: $uri")
     }
-    uri.getScheme match {
-      case windowsDrive(d) if windows =>
+
+    Option(uri.getScheme) match {
+      case Some(windowsDrive(d)) if windows =>
         new URI("file:/" + uri.toString.stripPrefix("/"))
-      case null =>
+      case None =>
         // Preserve fragments for HDFS file name substitution (denoted by "#")
         // For instance, in "abc.py#xyz.py", "xyz.py" is the name observed by the application
         val fragment = uri.getFragment
         val part = new File(uri.getPath).toURI
         new URI(part.getScheme, part.getPath, fragment)
-      case _ =>
+      case Some(other) =>
         uri
     }
   }
@@ -1399,10 +1400,11 @@ private[spark] object Utils extends Logging {
     } else {
       paths.split(",").filter { p =>
         val formattedPath = if (windows) formatWindowsPath(p) else p
-        new URI(formattedPath).getScheme match {
-          case windowsDrive(d) if windows => false
-          case "local" | "file" | null => false
-          case _ => true
+        val uri = new URI(formattedPath)
+        Option(uri.getScheme) match {
+          case Some(windowsDrive(d)) if windows => false
+          case Some("local") | Some("file") | None => false
+          case Some(other) => true
         }
       }
     }

core/src/test/scala/org/apache/spark/deploy/worker/ExecutorRunnerTest.scala

@@ -26,14 +26,12 @@ import org.apache.spark.SparkConf
 
 class ExecutorRunnerTest extends FunSuite {
   test("command includes appId") {
-    def f(s:String) = new File(s)
+    val appId = "12345-worker321-9876"
     val sparkHome = sys.props.getOrElse("spark.test.home", fail("spark.test.home is not set!"))
     val appDesc = new ApplicationDescription("app name", Some(8), 500,
-      Command("foo", Seq(), Map(), Seq(), Seq(), Seq()), "appUiUrl")
-    val appId = "12345-worker321-9876"
-    val er = new ExecutorRunner(appId, 1, appDesc, 8, 500, null, "blah", "worker321", f(sparkHome),
-      f("ooga"), "blah", new SparkConf, ExecutorState.RUNNING)
-
+      Command("foo", Seq(appId), Map(), Seq(), Seq(), Seq()), "appUiUrl")
+    val er = new ExecutorRunner(appId, 1, appDesc, 8, 500, null, "blah", "worker321",
+      new File(sparkHome), new File("ooga"), "blah", new SparkConf, ExecutorState.RUNNING)
     assert(er.getCommandSeq.last === appId)
   }
 }