[SPARK-2924] Required by scala 2.11, only one fun/ctor amongst overriden...

[SPARK-2924] Required by scala 2.11, only one fun/ctor amongst overriden alternatives, can have default argument(s).

...riden alternatives, can have default argument.

Author: Prashant Sharma <prashant.s@imaginea.com>

Closes #2750 from ScrapCodes/SPARK-2924/default-args-removed and squashes the following commits:

d9785c3 [Prashant Sharma] [SPARK-2924] Required by scala 2.11, only one function/ctor amongst overriden alternatives, can have default argument.

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

@@ -51,12 +51,27 @@ private[spark] class FileLogger(
   def this(
       logDir: String,
       sparkConf: SparkConf,
-      compress: Boolean = false,
-      overwrite: Boolean = true) = {
+      compress: Boolean,
+      overwrite: Boolean) = {
     this(logDir, sparkConf, SparkHadoopUtil.get.newConfiguration(sparkConf), compress = compress,
       overwrite = overwrite)
   }
 
+  def this(
+      logDir: String,
+      sparkConf: SparkConf,
+      compress: Boolean) = {
+    this(logDir, sparkConf, SparkHadoopUtil.get.newConfiguration(sparkConf), compress = compress,
+      overwrite = true)
+  }
+
+  def this(
+      logDir: String,
+      sparkConf: SparkConf) = {
+    this(logDir, sparkConf, SparkHadoopUtil.get.newConfiguration(sparkConf), compress = false,
+      overwrite = true)
+  }
+
   private val dateFormat = new ThreadLocal[SimpleDateFormat]() {
     override def initialValue(): SimpleDateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss")
   }

core/src/test/scala/org/apache/spark/util/FileLoggerSuite.scala

@@ -74,13 +74,13 @@ class FileLoggerSuite extends FunSuite with BeforeAndAfter {
 
   test("Logging when directory already exists") {
     // Create the logging directory multiple times
-    new FileLogger(logDirPathString, new SparkConf, overwrite = true).start()
-    new FileLogger(logDirPathString, new SparkConf, overwrite = true).start()
-    new FileLogger(logDirPathString, new SparkConf, overwrite = true).start()
+    new FileLogger(logDirPathString, new SparkConf, compress = false, overwrite = true).start()
+    new FileLogger(logDirPathString, new SparkConf, compress = false, overwrite = true).start()
+    new FileLogger(logDirPathString, new SparkConf, compress = false, overwrite = true).start()
 
     // If overwrite is not enabled, an exception should be thrown
     intercept[IOException] {
-      new FileLogger(logDirPathString, new SparkConf, overwrite = false).start()
+      new FileLogger(logDirPathString, new SparkConf, compress = false, overwrite = false).start()
     }
   }