使用JDBC连接到Azure SQL数据仓库时的SQLException

Question

com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host tcsqldatawh.database.windows.net, port 1433 has failed. Error: "null. Verify the connection properties. Make sure that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port. Make sure that TCP connections to the port are not blocked by a firewall.".
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:191)
at com.microsoft.sqlserver.jdbc.SQLServerException.ConvertConnectExceptionToSQLServerException(SQLServerException.java:242)
    at com.microsoft.sqlserver.jdbc.SocketFinder.findSocket(IOBuffer.java:2280)
    at com.microsoft.sqlserver.jdbc.TDSChannel.open(IOBuffer.java:493)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:1387)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:1068)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectInternal(SQLServerConnection.java:904)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:451)
    at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:1014)
    at java.sql.DriverManager.getConnection(DriverManager.java:664)
    at java.sql.DriverManager.getConnection(DriverManager.java:270)
    at testsqldw.SQLDatabaseConnection.main(SQLDatabaseConnection.java:30)

*

我在这里看到过关于连接到SQLServer DB的类似问题。

我将数据库配置为允许使用此处的过程访问我的IP。

package testsqldw;

import java.sql.*;  

    public class SQLDatabaseConnection {  

        // Connect to your database.  
        // Replace server name, username, and password with your credentials  
        public static void main(String[] args) {  


            String connectionString =  
                    "jdbc:sqlserver://databaseserver.database.windows.net:1433;"
                    +"database=databaseserver;"
                    +"user=username@databaseserver;"
                    + "password=password;"
                    + "encrypt=true;"
                    + "trustServerCertificate=false;"
                    + "hostNameInCertificate=*.database.windows.net;"
                    + "loginTimeout=30;";

            System.out.println("Total connection string is---\n"+connectionString);

            // Declare the JDBC objects.  
            Connection connection = null;  
            Statement statement = null;   
            ResultSet resultSet = null;  

            try {  
                connection = DriverManager.getConnection(connectionString);  

                // Create and execute a SELECT SQL statement.  
                String createSql = "create table employee(employee_id varchar(20));";  
                statement = connection.createStatement();  
                boolean status=statement.execute(createSql);

                System.out.println(status);

                // Print results from select statement  

            }  
            catch (Exception e) {  
                e.printStackTrace();  
            }  
            finally {  
                // Close the connections after the data has been handled.  

                if (statement != null) try { statement.close(); } catch(Exception e) {}  
                if (connection != null) try { connection.close(); } catch(Exception e) {}  
            }  
        }  
    }  

请帮助我解决这个问题。

Answer 1

根据我的经验，问题可能由以下原因引起：

1. 您创建的SQL Server可能无法正常工作。
2. 您可能使用了不正确的JDBC连接字符串。

出于第一个原因，您可以使用一些客户端工具连接到SQL Server。如果可以连接到服务器，则表示SQL server正常。如果没有，则可以创建新的SQL Server。之后，您可以根据以下URL https://azure.microsoft.com/en-us/documentation/articles/sql-data-warehouse-get-starting-provision/创建一个新的SQL数据仓库。URL还包括防火墙配置方法。