.net - IBM.Data.DB2.DB2Exception : ERROR [08001] [IBM] SQL30081N A communication error has been detected.

Question

我的应用程序通过 .net 提供程序 (FP5) 与 IBM DB2 配合使用。当我离开应用程序很长时间，然后尝试从数据库中获取任何内容时 - 我收到以下错误:

---> IBM.Data.DB2.DB2Exception: ERROR [08001] [IBM] SQL30081N A communication error has been detected. Communication protocol being used: "TCP/IP". Communication API being used: "SOCKETS". Location where the error was detected: "SERVER_IP". Communication function detecting the error: "recv". Protocol specific error code(s): "10054", "*", "0". SQLSTATE=08001

我使用 Entity Framework 与数据库通信，在崩溃操作之前我总是有以下代码:

using (EEntities db =  EntitiesFactory.CreateEEntity())
                {
                    // ..some operations
                }   

哪里:

public static EEntities CreateEEntity()
        {
            if (!string.IsNullOrEmpty(GlobalCommon.DBConnectionString))
                return CreateEEntity(GlobalCommon.DBConnectionString);
            return new EEntities();
        }

        public static EEntities CreateEEntity(string connectionString)
        {
            return new EEntities(connectionString);
        }

和:

public static string DBConnectionString
        {
            get
            {
                if (!string.IsNullOrWhiteSpace(_DBConnectionString))
                    return _DBConnectionString;

                string providerConnectionString = "Database=" +
                    Settings.Default.DBDatabase + ";User ID=" +
                    DBUserID + ";Password=" +
                    DBPassword + ";Server=" +
                    DBServer + ";Max Pool Size=150;Min Pool Size=15;Connection Lifetime=80;Pooling=true;";


                // Initialize the EntityConnectionStringBuilder.
                EntityConnectionStringBuilder entityBuilder =
                    new EntityConnectionStringBuilder();

                //Set the provider name.
                entityBuilder.Provider = "IBM.Data.DB2";

                // Set the provider-specific connection string.
                entityBuilder.ProviderConnectionString = providerConnectionString;

                // Set the Metadata location.
                entityBuilder.Metadata = @"res://*/DAL.DBModel.csdl|
                            res://*/DAL.DBModel.ssdl|
                            res://*/DAL.DBModel.msl";
                _DBConnectionString = entityBuilder.ToString();

                return _DBConnectionString;
            }
            set
            {
                _DBConnectionString = value;
            }
        }

所以我认为如果连接终止，我总是会重新连接以下几行。
池或连接生命周期会不会有问题？..

Answer 1

此错误通常意味着您的连接已被 DBA 终止，或者存在一个网络故障中断了与您的应用程序的连接。

如果出现此错误，只需重新连接到数据库即可。