Change Variable Type	blocks : BlockInfoContiguousUnderConstruction[] to blocks : BlockInfoUnderConstruction[] in method public handleHeartbeat(nodeReg DatanodeRegistration, reports StorageReport[], blockPoolId String, cacheCapacity long, cacheUsed long, xceiverCount int, maxTransfers int, failedVolumes int, volumeFailureSummary VolumeFailureSummary) : DatanodeCommand[] in class org.apache.hadoop.hdfs.server.blockmanagement.DatanodeManager