switch ( op ) { case DataTransferProtocol.OP_READ_BLOCK: readBlock( in ); datanode.myMetrics.readBlockOp.inc(DataNode.now() - startTime); if (local)
switch ( op ) { case DataTransferProtocol.OP_READ_BLOCK: readBlock( in, versionAndOpcode ); datanode.myMetrics.readBlockOp.inc(DataNode.now() - startTime); if (local)