Minor updates.

Author: tdas

streaming/src/main/scala/org/apache/spark/streaming/rdd/WriteAheadLogBackedBlockRDD.scala

@@ -37,8 +37,8 @@ private[streaming]
 class WriteAheadLogBackedBlockRDDPartition(
     val index: Int,
     val blockId: BlockId,
-    val segment: WriteAheadLogFileSegment
-  ) extends Partition
+    val segment: WriteAheadLogFileSegment)
+  extends Partition
 
 
 /**
@@ -59,11 +59,11 @@ private[streaming]
 class WriteAheadLogBackedBlockRDD[T: ClassTag](
     @transient sc: SparkContext,
     @transient hadoopConfig: Configuration,
-    @transient override val blockIds: Array[BlockId],
-    @transient val segments: Array[WriteAheadLogFileSegment],
-    val storeInBlockManager: Boolean,
-    val storageLevel: StorageLevel
-  ) extends BlockRDD[T](sc, blockIds) {
+    @transient blockIds: Array[BlockId],
+    @transient segments: Array[WriteAheadLogFileSegment],
+    storeInBlockManager: Boolean,
+    storageLevel: StorageLevel)
+  extends BlockRDD[T](sc, blockIds) {
 
   require(
     blockIds.length == segments.length,
@@ -76,7 +76,8 @@ class WriteAheadLogBackedBlockRDD[T: ClassTag](
   override def getPartitions: Array[Partition] = {
     assertValid()
     Array.tabulate(blockIds.size) { i =>
-      new WriteAheadLogBackedBlockRDDPartition(i, blockIds(i), segments(i)) }
+      new WriteAheadLogBackedBlockRDDPartition(i, blockIds(i), segments(i))
+    }
   }
 
   /**
@@ -116,8 +117,8 @@ class WriteAheadLogBackedBlockRDD[T: ClassTag](
    */
   override def getPreferredLocations(split: Partition): Seq[String] = {
     val partition = split.asInstanceOf[WriteAheadLogBackedBlockRDDPartition]
-    val blockLocations = getBlockIdLocations().get(partition.blockId)
-    lazy val segmentLocations = HdfsUtils.getFileSegmentLocations(
+    def blockLocations = getBlockIdLocations().get(partition.blockId)
+    def segmentLocations = HdfsUtils.getFileSegmentLocations(
       partition.segment.path, partition.segment.offset, partition.segment.length, hadoopConfig)
     blockLocations.orElse(segmentLocations).getOrElse(Seq.empty)
   }

streaming/src/test/scala/org/apache/spark/streaming/rdd/WriteAheadLogBackedBlockRDDSuite.scala

@@ -86,7 +86,7 @@ class WriteAheadLogBackedBlockRDDSuite extends FunSuite with BeforeAndAfterAll {
       testStoreInBM: Boolean = false
     ) {
     val numBlocks = numPartitionssInBM + numPartitionsInWAL
-    val data = Seq.tabulate(numBlocks) { _ => Seq.fill(10) { scala.util.Random.nextString(50) } }
+    val data = Seq.fill(numBlocks, 10)(scala.util.Random.nextString(50))
 
     // Put the necessary blocks in the block manager
     val blockIds = Array.fill(numBlocks)(StreamBlockId(Random.nextInt(), Random.nextInt()))