Web API 使用几天后总是无法连接到 MYSQL 数据库

Question

我有一个 Web API，在它工作了大约 20 天后无法连接到那个 MYSQL 服务器，它无法正常工作，因为它恢复正常我必须重新启动服务器，就是这样真的很奇怪，我尝试使用 navicat 之类的其他工具包连接到那个 MYSQL 服务器，但在它无法连接到该数据库的时候，它也不能正常工作，它只是无法连接到 MySQL显示状态代码的数据库，如 S1000 或 10055（我尝试 google 该代码，它不起作用，我不知道如何处理该问题）我的 Web API 在 VS 2015 上使用 EF 5.0、.NET 4.6 在 C# 中构建。我将其部署在 Windows 2008 R2 服务器上，此 Web 服务器上的 IIS 上有 3 个 Web api，还有其他服务器也是 Windows 2008 R2，它有MySQL服务器版本是5.5，由于我只是开发人员，我只是在web服务器级别记录异常，我试图在MySQL端找到日志文件，DBA没有'不记录该数据库上的任何文件，这真的很不幸。

这是我的控制器代码

  public DMLjfretModels uploadjfdetails(DMLjfparamsModels dmlparms)
    {
        DMLjfretModels dmlret = new Models.DMLjfretModels();
        dmlret.returncode = 0;
        dmlret.expmsg = "";



        if (dmlparms.clicardjftype != "1" && dmlparms.clicardjftype != "2" && dmlparms.clicardjftype != "4")
        {
            dmlret.returncode = -30;
            return dmlret;
        }

        if ((dmlparms.clicard??"").Trim().Length != 10)
        {
            dmlret.returncode = -60;
            dmlret.expmsg = "cardno is invald";
            return dmlret;
        }

        try
        {
            using (var context = new testEntities())
            {
                context.Database.CommandTimeout = 180;
                if (ModelState.IsValid)
                {
                    Globalvariable glv = new Globalvariable();
                    int result = glv.validate(dmlparms.username, dmlparms.password, dmlparms.curno);
                    if (result!=0)
                    {
                        dmlret.returncode = result;
                        return dmlret;
                    }

                    string clicardstring = dmlparms.clicard.Trim();
                    var memberresult = context.wp_client_card.Where(x => x.cli_card == clicardstring);
                    int therecordscount = memberresult.Count();

                    try
                    {
                        string filePath = @"d:\log\lognumber" + DateTime.Now.ToString("yyyy-MM-dd") + ".txt"; 

                        using (StreamWriter writer = new StreamWriter(filePath, true))
                        {
                            writer.WriteLine("cli_card:" + clicardstring ?? "" + ",listno:" + dmlparms.clicardjflistno ?? "" + ",countvalue:" + therecordscount.ToString());
                            writer.WriteLine(Environment.NewLine + "-----------------------------------------------------------------------------" + Environment.NewLine);
                        }

                    }
                    catch (Exception ex)
                    {
                        string filePath = @"d:\log\Error" + DateTime.Now.ToString("yyyy-MM-dd") + ".txt";

                        using (StreamWriter writer = new StreamWriter(filePath, true))
                        {
                            writer.WriteLine("Message :" + ex.Message + "<br/>" + Environment.NewLine + "StackTrace :" + ex.StackTrace +
                               "" + Environment.NewLine + "Date :" + DateTime.Now.ToString());
                            writer.WriteLine(Environment.NewLine + "-----------------------------------------------------------------------------" + Environment.NewLine);
                        }
                    }

                    if (therecordscount == 0)
                    {
                        dmlret.returncode = -25;
                        return dmlret;
                    }



                    if (dmlparms.clicardjftype== "1" || dmlparms.clicardjftype == "2")
                    {
                        foreach (DMLdetailModels dm in dmlparms.clidetails)
                        {
                            if (string.IsNullOrEmpty(dm.prodno) || string.IsNullOrEmpty(dm.batchno)
                                || string.IsNullOrEmpty(dm.prodadd) || dm.prodnum <= 0.0 || dm.sellprice <= 0.0
                                || dm.stdprice <= 0.0  || dm.clicardjfnum<=0.0)
                            {
                                dmlret.returncode = -33;
                                return dmlret;
                            }
                        }
            
                    }
                    else
                    {
                        decimal thesum = context.wp_cli_card_jf.Where(x => x.cli_card==dmlparms.clicard.Trim()) 
                         .Sum( 
                                        d =>
                                        ((d.cli_card_jf_type == "1") && (d.cli_card_jf_num != null))
                                         ? d.cli_card_jf_num
                                          : ((d.cli_card_jf_type == "2") && (d.cli_card_jf_num != null))
                                          ? ((Decimal?)((Decimal)0) - d.cli_card_jf_num)
                                          : ((d.cli_card_jf_type == "4") && (d.cli_card_jf_num != null))
                                          ? ((Decimal?)((Decimal)0) - d.cli_card_jf_num)
                                          : (Decimal?)((Decimal)0)
                                           )??0.0M;

                        

                        decimal thesumjf = 0.0M;
                        foreach(DMLdetailModels details in dmlparms.clidetails)
                        {
                            thesumjf = thesumjf + Convert.ToDecimal( details.clicardjfnum);
                        }

                        if (thesum< thesumjf)
                        {
                            dmlret.returncode = -50;
                            return dmlret;
                        }

                    }

                    foreach (DMLdetailModels detail in dmlparms.clidetails)
                    {
                        //write the data into my database
                        context.wp_cli_card_jf.Add(wjf);
                    }

                    context.SaveChanges();
                    return dmlret;

                }
                else
                {   
                    dmlret.returncode = -20;
                    return dmlret;
                }
            }
        }
        catch (Exception ex)
        {
           
           logfile(ex);
        }

    }

顺便说一句，我也在网络中记录了请求和响应api

      public class LogRequestAndResponseHandler : DelegatingHandler
{
    protected override async Task<HttpResponseMessage> SendAsync(
        HttpRequestMessage request, CancellationToken cancellationToken)
    {
        String UUID = Guid.NewGuid().ToString();
        // log request body
        string requestBody = await request.Content.ReadAsStringAsync();
        string requestmethod = request.RequestUri.ToString();
        string mymethod = requestmethod.ToLower();



        // let other handlers process the request
        var result = await base.SendAsync(request, cancellationToken);

        if (result.Content != null)
        {
            // once response body is ready, log it
            var responseBody = await result.Content.ReadAsStringAsync();
            logrequestnresponse(UUID, requestBody, responseBody.ToString(), mymethod);
        }

        return result;
    }


    private void logrequestnresponse(string uuid, string requestbody, string responsebody,string requestmethod)
    {
        try
        {
             using (var context = new testEntities())
              {
                  context.Database.CommandTimeout = 180;
                  wp_web_api_log wplog = context.wp_web_api_log.Create();
                  wplog.row_index = uuid;
                  wplog.request_detail = requestbody;
                  wplog.request_url = requestmethod;
                  wplog.response_detail = responsebody;
                  context.wp_web_api_log.Add(wplog);
                  context.SaveChanges();
              } 

            string filePath = @"d:\log\Logfile.txt";

      
        }
        catch (Exception ex)
        {
            
             logfile(ex);

         }
    }
}

我的日志文件记录了它在那段时间无法连接到 MYSQL 数据库

 Message :The underlying provider failed on Open<br/>
 StackTrace :   at System.Data.Entity.Core.EntityClient.EntityConnection.Open()
 at System.Data.Entity.Core.Objects.ObjectContext.EnsureConnection(Boolean shouldMonitorTransactions)
 at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess)
 at System.Data.Entity.Core.Objects.ObjectContext.SaveChangesToStore(SaveOptions options, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction)
 at System.Data.Entity.Core.Objects.ObjectContext.SaveChangesInternal(SaveOptions options, Boolean executeInExistingTransaction)
 at System.Data.Entity.Internal.InternalContext.SaveChanges()
 at dggyapi.LogRequestAndResponseHandler.Logrequestnresponse(String uuid, String requestbody, String responsebody, String requestmethod),"},method:querymember
 Overall Exception:System.Data.Entity.Core.EntityException: The underlying provider failed on           Open---> MySql.Data.MySqlClient.MySqlException: Unable to connect to any of the specified MySQL hosts. ---> System.Net.Sockets.SocketException: An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full.
 at System.Net.Sockets.Socket.DoBind(EndPoint endPointSnapshot, SocketAddress socketAddress)
 at System.Net.Sockets.Socket.InternalBind(EndPoint localEP)
 at System.Net.Sockets.Socket.BeginConnectEx(EndPoint remoteEP, Boolean flowContext, AsyncCallback callback, Object state)
 at System.Net.Sockets.Socket.BeginConnect(EndPoint remoteEP, AsyncCallback callback, Object state)
 at MySql.Data.Common.MyNetworkStream.CreateSocketStream(MySqlConnectionStringBuilder settings, IPAddress ip, Boolean unix)
 at MySql.Data.Common.MyNetworkStream.CreateStream(MySqlConnectionStringBuilder settings, Boolean unix)
 at MySql.Data.Common.StreamCreator.GetStream(MySqlConnectionStringBuilder settings)
 at MySql.Data.MySqlClient.NativeDriver.Open()
 ---  End of inner exception stack trace ---
 at MySql.Data.MySqlClient.NativeDriver.Open()
 at MySql.Data.MySqlClient.Driver.Open()
 at MySql.Data.MySqlClient.Driver.Create(MySqlConnectionStringBuilder settings)
 at MySql.Data.MySqlClient.MySqlPool.GetPooledConnection()
 at MySql.Data.MySqlClient.MySqlPool.TryToGetDriver()
 at MySql.Data.MySqlClient.MySqlPool.GetConnection()
 at MySql.Data.MySqlClient.MySqlConnection.Open()
 at System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch[TTarget,TInterceptionContext](TTarget target, Action`2 operation, TInterceptionContext interceptionContext, Action`3 executing, Action`3 executed)
 at System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.Open(DbConnection connection, DbInterceptionContext interceptionContext)
 at System.Data.Entity.Core.EntityClient.EntityConnection.Open()
 ---  End of inner exception stack trace ---
 at System.Data.Entity.Core.EntityClient.EntityConnection.Open()
 at System.Data.Entity.Core.Objects.ObjectContext.EnsureConnection(Boolean shouldMonitorTransactions)
 at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess)
 at System.Data.Entity.Core.Objects.ObjectContext.SaveChangesToStore(SaveOptions options, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction)
 at System.Data.Entity.Core.Objects.ObjectContext.SaveChangesInternal(SaveOptions options, Boolean executeInExistingTransaction)
 at System.Data.Entity.Internal.InternalContext.SaveChanges()
 at dggyapi.LogRequestAndResponseHandler.Logrequestnresponse(String uuid, String requestbody, String responsebody, String requestmethod)
 Innerexception:System.Net.Sockets.SocketException (0x80004005): An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full.
 at System.Net.Sockets.Socket.DoBind(EndPoint endPointSnapshot, SocketAddress socketAddress)
 at System.Net.Sockets.Socket.InternalBind(EndPoint localEP)
 at System.Net.Sockets.Socket.BeginConnectEx(EndPoint remoteEP, Boolean flowContext, AsyncCallback callback, Object state)
 at System.Net.Sockets.Socket.BeginConnect(EndPoint remoteEP, AsyncCallback callback, Object state)
 at MySql.Data.Common.MyNetworkStream.CreateSocketStream(MySqlConnectionStringBuilder settings, IPAddress ip, Boolean unix)
 at MySql.Data.Common.MyNetworkStream.CreateStream(MySqlConnectionStringBuilder settings, Boolean unix)
 at MySql.Data.Common.StreamCreator.GetStream(MySqlConnectionStringBuilder settings)
 at MySql.Data.MySqlClient.NativeDriver.Open()

我刚刚重新启动了我的网络服务器，并尝试跟踪持久性，我发现了

  mysql> show status where variable_name like 'thread%';
  +-------------------+-------+
  | Variable_name     | Value |
  +-------------------+-------+
  | Threads_cached    | 4     |
  | Threads_connected | 41    |
  | Threads_created   | 53302 |
  | Threads_running   | 2     |
  +-------------------+-------+
  4 rows in set

  mysql> show processlist;
    +----------+---------+--------------------+--------+---------+------+-------+------------------+
  | Id       | User    | Host               | db     | Command | Time | State | Info             |
        +----------+---------+--------------------+--------+---------+------+-------+------------------+
  |  3540670 | myuser  | localhost:56924    | NULL   | Sleep   |  111 |       | NULL             |
  |  3540671 | myuser  | localhost:56925    | NULL   | Sleep   |  111 |       | NULL             |
  |  3540692 | myuser  | localhost:56928    | NULL   | Sleep   |    2 |       | NULL             |
  | 11278418 | myuser  | 192.168.0.200:1038 | mydb   | Sleep   |   44 |       | NULL             |
  | 11278428 | myuser  | 192.168.0.200:1043 | mydb   | Sleep   |   38 |       | NULL             |
  | 11278439 | myuser  | 192.168.0.200:1044 | mydb   | Sleep   |   33 |       | NULL             |
  | 11278441 | myuser  | 192.168.0.200:1045 | mydb   | Sleep   |   15 |       | NULL             |
  | 11278597 | myuser  | 192.168.0.200:1077 | mydb   | Sleep   |   18 |       | NULL             |
  | 11278602 | myuser  | 192.168.0.200:1078 | mydb   | Sleep   |    6 |       | NULL             |
  | 11278627 | myuser  | 192.168.0.200:1080 | mydb   | Sleep   |  102 |       | NULL             |
  | 11278654 | myuser  | 192.168.0.200:1082 | mydb   | Sleep   |  102 |       | NULL             |
  | 11278668 | myuser  | 192.168.0.200:1087 | mydb   | Sleep   |   97 |       | NULL             |
  | 11278710 | myuser  | 192.168.0.200:1088 | mydb   | Sleep   |   89 |       | NULL             |
  | 11278768 | myuser  | 192.168.0.200:1089 | mydb   | Sleep   |   89 |       | NULL             |
  | 11278780 | myuser  | 192.168.0.200:1090 | mydb   | Sleep   |   88 |       | NULL             |
  | 11278781 | myuser  | 192.168.0.200:1091 | mydb   | Sleep   |   85 |       | NULL             |
  | 11278805 | myuser  | 192.168.0.200:1092 | mydb   | Sleep   |   76 |       | NULL             |
  | 11278860 | myuser  | 192.168.0.200:1093 | mydb   | Sleep   |   73 |       | NULL             |
  | 11278877 | myuser  | 192.168.0.200:1094 | mydb   | Sleep   |   66 |       | NULL             |
  | 11278898 | myuser  | 192.168.0.200:1099 | mydb   | Sleep   |   54 |       | NULL             |
  | 11278913 | myuser  | 192.168.0.200:1100 | mydb   | Sleep   |   46 |       | NULL             |
  | 11278935 | myuser  | 192.168.0.200:1101 | mydb   | Sleep   |   42 |       | NULL             |
  | 11303229 | myuser  | 192.168.0.200:1833 | mydb   | Sleep   |    3 |       | NULL             |
  | 11307621 | myuser  | 192.168.0.200:2006 | mydb   | Sleep   |  161 |       | NULL             |
  | 11307953 | myuser  | 192.168.0.200:2028 | mydb   | Sleep   |   93 |       | NULL             |
  | 11307998 | myuser  | 192.168.0.200:2029 | mydb   | Sleep   |   76 |       | NULL             |
  | 11308004 | myuser  | 192.168.0.200:2030 | mydb   | Sleep   |   74 |       | NULL             |
  | 11308244 | myuser  | 192.168.0.200:2038 | mydb   | Sleep   |  147 |       | NULL             |
  | 11308349 | myuser  | 192.168.0.200:2044 | mydb   | Sleep   |  132 |       | NULL             |
  | 11308350 | myuser  | 192.168.0.200:2045 | mydb   | Sleep   |  127 |       | NULL             |
  | 11308387 | myuser  | 192.168.0.200:2051 | mydb   | Sleep   |  126 |       | NULL             |
  | 11308416 | myuser  | 192.168.0.200:2052 | mydb   | Sleep   |  119 |       | NULL             |
  | 11308454 | myuser  | 192.168.0.200:2053 | mydb   | Sleep   |   71 |       | NULL             |
  | 11308460 | myuser  | 192.168.0.200:2054 | mydb   | Sleep   |   98 |       | NULL             |
  | 11308487 | myuser  | 192.168.0.200:2055 | mydb   | Sleep   |   44 |       | NULL             |
  | 11308498 | myuser  | 192.168.0.200:2056 | mydb   | Sleep   |   23 |       | NULL             |
  | 11308542 | myuser  | 192.168.0.200:2057 | mydb   | Sleep   |   13 |       | NULL             |
  | 11308560 | myuser  | 192.168.0.200:2058 | mydb   | Sleep   |   10 |       | NULL             |
  | 11308682 | myuser  | server5:5190       | NULL   | Sleep   |  117 |       | NULL             |
  | 11308722 | myuser  | server5:51903      | mydb   | Query   |    0 | NULL  |       show processlist |
        +----------+---------+--------------------+--------+---------+------+-------+------------------+
  40 rows in set

这正常吗？

Answer 1

问题好像说清楚了，报错说：

System.Net.Sockets.SocketException: An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full.

造成这种情况的原因可能有多种（您可以 google 它）但通常是因为缺少硬件、缺少服务器更新、过时的更新，或者您没有在连接上释放对象，或者不要关闭连接，内存不足，资源不足，但定义：您正在使用很多端口。

你可以试试这个：

在 Windows 服务器 2008 R2 上打开命令提示符

键入以下内容 netsh int ipv4 set dynamicport tcp start=10000 num=50000 按 Enter

键入以下内容 netsh int ipv4 set dynamicport udp start=10000 num=50000 按 Enter

键入以下内容 netsh int ipv6 set dynamicport tcp start=10000 num=50000 按 Enter

键入以下内容 netsh int ipv6 set dynamicport udp start=10000 num=50000 按 Enter

更多信息请访问： http://web.archive.org/web/20160118151510/http://blogs.technet.com/b/askds/archive/2008/10/29/port-exhaustion-and-you-or-why-the-netstat-tool-is-your-friend.aspx

https://blog.whitesites.com/blog.aspx?key=635140180116307813

Web API 使用几天后总是无法连接到 MYSQL 数据库

Web API always can't connect to MYSQL db after using some days later

c#

mysql

asp.net-web-api