c# - 连接尝试失败，因为连接方在一段时间后没有正确响应。从 C# 调用存储过程时

Question

我正在尝试从我的 mysql 数据库中调用一个存储过程，下面是我的 C# 程序中的代码，但我一直遇到同样的错误

SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.

在数据库中查看存储过程是否正常工作，所以有没有一种方法可以检查该过程何时完成 (第一次问关于堆栈溢出的问题我希望我提供了足够的信息，如果还有什么让我知道)

这是我的 C# 代码

 public void BasicCveInfoFill()
        {
            MySqlTransaction transaction = null;
            try
            {
                using(MySqlConnection conn = GetConnection())
                {
                    conn.Open();
                    using(MySqlCommand cmd = new MySqlCommand())
                    {
                        cmd.Connection= conn;
                        cmd.Transaction = transaction;                     
                        cmd.CommandType = CommandType.StoredProcedure;
                        cmd.CommandText = @"cveTableFill";                        
                        var rows = cmd.ExecuteNonQuery();                        
                    }
                }
            }
            catch(Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }

GetConnection方法(切换到随机数据库)

public MySqlConnection GetConnection()
        {
            string connString = @"server=localhost;user=root;database=test;password=";
            MySqlConnection conn = new MySqlConnection(connString);
            return conn;
        }

这是存储过程的代码

DROP PROCEDURE IF EXISTS cveTableFill;
DELIMITER ;;
CREATE PROCEDURE cveTableFill()
BEGIN
DECLARE n INT DEFAULT 0;
DECLARE i INT DEFAULT 0;
SELECT COUNT(*) FROM cpe INTO n;
SET i=0;
WHILE i<n DO 
  INSERT IGNORE INTO cve(cve_name, cpeMatchCount) SELECT c.cveMatch, COUNT(c.cveMatch) FROM cpe c GROUP BY c.cveMatch HAVING COUNT(c.cveMatch);
  SET i = i + 1;
END WHILE;

End;;
DELIMITER ;

这是完整的异常

MySql.Data.MySqlClient.MySqlException (0x80004005): Fatal error encountered during command execution. ---> MySql.Data.MySqlClient.MySqlException (0x80004005): Fatal error encountered attempting to read the resultset. ---> MySql.Data.MySqlClient.MySqlException (0x80004005): Reading from the stream has failed. ---> System.IO.IOException: Unable to read data from the transport connection: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.. ---> System.Net.Sockets.SocketException (10060): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 count) --- End of inner exception stack trace --- at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 count) at MySql.Data.MySqlClient.TimedStream.Read(Byte[] buffer, Int32 offset, Int32 count) at MySql.Data.MySqlClient.MySqlStream.ReadFully(Stream stream, Byte[] buffer, Int32 offset, Int32 count) at MySql.Data.MySqlClient.MySqlStream.LoadPacket() at MySql.Data.MySqlClient.MySqlStream.LoadPacket() at MySql.Data.MySqlClient.MySqlStream.ReadPacket() at MySql.Data.MySqlClient.NativeDriver.GetResult(Int32& affectedRow, Int64& insertedId) at MySql.Data.MySqlClient.Driver.GetResult(Int32 statementId, Int32& affectedRows, Int64& insertedId) at MySql.Data.MySqlClient.Driver.NextResult(Int32 statementId, Boolean force) at MySql.Data.MySqlClient.MySqlDataReader.NextResult() at MySql.Data.MySqlClient.MySqlDataReader.NextResult() at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior) at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior) at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader()
at MySql.Data.MySqlClient.MySqlCommand.ExecuteNonQuery() at VulnerabilityDB.SighburDatabaseConnect.BasicCveInfoFill() in C:\Dev\pcs\PcsProjects\SbomArenaC\VulnerabilityDB\SighburDatabaseConnect.cs:line 65

Answer 1

尝试从你的命令中删除超时

cmd.CommandTimeout = 0;

该命令的默认超时时间为 30 秒

https://learn.microsoft.com/en-us/dotnet/api/system.data.sqlclient.sqlcommand.commandtimeout

The time in seconds to wait for the command to execute. The default is 30 seconds.