Problema na conexão do java com o oracle. Erro muito estranho!

<%
    try {
        Properties props = new Properties();
        props.put("user", "USUARIO");
        props.put("password", "SENHA");
        props.put("SetBigStringTryClob", "true");

        DriverManager.registerDriver(new OracleDriver());
        Connection oConnect = DriverManager.getConnection("jdbc:oracle:thin:@192.168.0.3:1521:sid", props);
        oConnect.setAutoCommit(true);
        
        PreparedStatement sConnect = oConnect.prepareStatement("SELECT MAX(C000_COD) + 1 AS C000_COD FROM C000");
        ResultSet rConnect         = sConnect.executeQuery();

        if (rConnect.next()) {
            out.println("QUANTIDADE: " + rConnect.getInt("c000_cod"));
        }

        rConnect.close();
        sConnect.close();

    } catch (SQLException e) {
        throw new RuntimeException(e);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }

%>

public class Conexao {
    
    public static final String ABD_SERVIDOR = "jdbc:oracle:thin:@192.168.0.3:1521:sid";
    public static final String ABD_USUARIO  = "USUARIO";
    public static final String ABD_SENHA    = "SENHA";
    
    private Connection objConexao = null;
    
    public Connection getInstance() {
        
        if (this.objConexao == null) {
            try {
                
                Properties props = new Properties();
                props.put("user", ABD_USUARIO);
                props.put("password", ABD_SENHA);
                props.put("SetBigStringTryClob", "true");
                
                DriverManager.registerDriver(new OracleDriver());
                Connection oConnect = DriverManager.getConnection(ABD_SERVIDOR, props);
                oConnect.setAutoCommit(true);
                
            } catch (SQLException e) {
                throw new RuntimeException(e);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
        
        return this.objConexao;
    }
}