我的网站有很多用户(每天2万到6万),这是一个移动文件下载网站。我可以远程访问我的服务器(windows server 2008-R2)。我以前收到过“服务器不可用”错误,但我现在看到一个连接超时错误。 我不熟悉这个——为什么会发生这种情况,我该如何解决它?

完整的误差如下:

Server Error in '/' Application. Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. The statement has been terminated. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Data.SqlClient.SqlException: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. The statement has been terminated. Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace: [SqlException (0x80131904): Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. The statement has been terminated.] System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) +404 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning() +412 System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +1363 System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) +6387741 System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) +6389442 System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) +538 System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe) +689 System.Data.SqlClient.SqlCommand.ExecuteNonQuery() +327 NovinMedia.Data.DbObject.RunProcedure(String storedProcName, IDataParameter[] parameters, Int32& rowsAffected) +209 DataLayer.OnlineUsers.Update_SessionEnd_And_Online(Object Session_End, Boolean Online) +440 NiceFileExplorer.Global.Application_Start(Object sender, EventArgs e) +163 [HttpException (0x80004005): Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. The statement has been terminated.] System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +4052053 System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +191 System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +352 System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +407 System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +375 [HttpException (0x80004005): Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. The statement has been terminated.] System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +11686928 System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +141 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +4863749


回答后编辑: my Application_Start在全局。Asax是这样的:

protected void Application_Start(object sender, EventArgs e)
{
    Application["OnlineUsers"] = 0;

    OnlineUsers.Update_SessionEnd_And_Online(
        DateTime.Now,
        false);

    AddTask("DoStuff", 10);
}

被调用的存储过程是:

ALTER Procedure [dbo].[sp_OnlineUsers_Update_SessionEnd_And_Online]
    @Session_End datetime,
    @Online bit
As
Begin
    Update OnlineUsers
    SET
        [Session_End] = @Session_End,
        [Online] = @Online

End

我有两种获取在线用户的方法:

using Application["OnlineUsers"] = 0; 另一个使用数据库

因此,对于方法#2,我重置所有在线用户在Application_Start。该表中有超过482,751条记录。


当前回答

超时,因为sql查询花费的时间超过了您设置的时间 在sqlCommand。CommandTimeout财产。 显然,您可以增加CommandTimeout来解决这个问题,但是 在此之前,您必须通过添加索引来优化查询。如果你 运行您的查询在Sql server管理工作室,包括实际 执行计划,然后Sql server管理工作室将建议 你适当的索引。大多数情况下,您将摆脱超时问题 如果你能优化你的查询。

其他回答

还要确保没有待处理的事务。:)

我做了一些测试,开始了一个交易以确保安全,但从未关闭它。我希望错误会更明确,但哦,好吧!

我也有同样的问题,并通过在web中添加“连接时间”值来解决。配置文件。找到connectionStrings并添加连接超时=3600"

这是样本

  <connectionStrings>
    <add name="MyConn" providerName="System.Data.SqlClient" connectionString="Data Source=MySQLServer;Initial Catalog=MyDB;User ID=sa;Password=123;Connection Timeout=3600" />
  </connectionStrings>

我们最近升级到NuGet版本的SqlClient (Microsoft.Data.SqlClient),其中包含一个错误。此错误是在1的生命周期中引入的。X周期,已经固定。该修复将在2.0.0版本中可用,但在撰写本文时还不可用。可以预览一下。

你可以在这里查看详细信息: https://github.com/dotnet/SqlClient/issues/262

如果您正在使用ASP。使用Startup.cs约定,你可以像这样访问和设置查询命令超时选项:

public void ConfigureServices(IServiceCollection services)
{
    services.AddDbContextPool<MyDbContext>(_ =>
    {
        _.UseSqlServer(Configuration.GetConnectionString("MyConnectionString"), options => 
        {
            options.CommandTimeout(180); // 3 minutes
        });
    });
}

在我的例子中,我使用了EntityFrameworkCore。 由于我想处理的输入超过了查询限制,这个错误来找我。 我的案例的解决方案是将数据处理分割成块,通过这种方法,我能够适应限制。 是的,这需要时间,但至少它处理了所有的输入记录。