Extract Method	private scan(totalBlocks long, diffsize int, missingMetaFile long, missingBlockFile long, missingMemoryBlocks long, mismatchBlocks long, duplicateBlocks long) : void extracted from private scan(totalBlocks long, diffsize int, missingMetaFile long, missingBlockFile long, missingMemoryBlocks long, mismatchBlocks long) : void in class org.apache.hadoop.hdfs.server.datanode.TestDirectoryScanner