Geek asks and answers

Request frequency

I encounter the following problem from time to time, and I do not know how to fix it.

I often get the following errors, and I had to restart the IISor republishfix the problem temporarily:

Error Message:Request timed out.
Error Message:ERROR [08S01] [Informix .NET provider]Communication link failure.
Error Message:Thread was being aborted.

I am trying to do:

<httpRuntime executionTimeout="600" />

but all the same problems !!

Stack Trace:
   at System.Web.HttpContext.InvokeCancellableCallback(WaitCallback callback, Object state)
   at System.Web.UI.Page.AsyncPageBeginProcessRequest(HttpContext context, AsyncCallback callback, Object extraData)
   at ASP.appmaster_aspx.BeginProcessRequest(HttpContext context, AsyncCallback cb, Object data)
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

My page:

 protected void Page_Load(object sender, EventArgs e)
        {


            if (Session["emp_num"] != null && !string.IsNullOrEmpty(Session["emp_num"].ToString()))
            {
                try
                {

                    string user_setting = Personalization_DAL.CheckWidgetSettings(int.Parse(Session["emp_num"].ToString()));

                    if (!string.IsNullOrEmpty(user_setting))
                    {
                        user_flag = int.Parse(user_setting);
                    }

                    GetLinkedApp = DB_Connection_s.DB_Connection.GetLinkedAppUser(int.Parse(Session["emp_num"].ToString()));
                    if (!Page.IsPostBack)
                    {
                        //Profile
                        GetProfile();

                        if (Session["emp_app"] != null && !string.IsNullOrEmpty(Session["emp_app"].ToString()))
                        {
                            BindAvailableSystems(Session["emp_app"].ToString());
                        }

                        BindMainSystems();

                        if (GetLinkedApp > 0)
                        {
                            rlv_available_sys.Visible = true;
                            h5_app.Visible = true;
                            lbtn_addApp.Visible = false;
                            h4_app.Visible = false;
                            intro.Visible = true;

                        }
                        else
                        {
                            rlv_available_sys.Visible = false;
                            h5_app.Visible = false;
                            lbtn_addApp.Visible = true;
                            h4_app.Visible = true;
                            intro.Visible = false;
                        }
                        //Applications
                        if (rlv_available_sys.Visible == true)
                        {
                            Session["emp_app"] = GetLinkedApp;
                            BindAvailableSystems(Session["emp_app"].ToString());
                            if (user_flag > 0)
                            {
                                Get_UserApplicationSystems(1, 1, GetLinkedApp.ToString());
                            }
                            else
                            {
                                Get_UserApplicationSystems(user_flag, 1, GetLinkedApp.ToString());
                            }

                        }
                        //services
                        Get_MainSystems(user_flag);
                        if (GetLinkedApp > 0)
                        {
                            GetServiceInformation();
                        }
                        string[] statistics = TrackUser();
                        base.TraceActivity("Enter the portal", "https://" + Request.Url.Authority + "/AppMaster.aspx", statistics[0], statistics[1], statistics[2]);
                    }

                    TraceSystemsMode();
                }
                catch (Exception ee)
                {
                    string message = ee.Message;
                }

            }
            else
            {
                Response.Redirect("LoginPage.aspx", false);
            }
        }

My general handler:

public void ProcessRequest(HttpContext context)
        {
            try
            {
                using(Stream photo_stream = Photo_DAL.RetrievePhoto(int.Parse(context.Session["emp_num"].ToString())))
               {
                byte[] photo_bytes = Photo_DAL.StreamToByteArray(photo_stream);
                if (photo_bytes == null)
                {
                    photo_bytes = File.ReadAllBytes(Path.Combine(context.Server.MapPath("~/images/PortalImages/"), "user.png"));
                }
                //context.Response.ContentType = "image/png";
                context.Response.BinaryWrite(photo_bytes);
                }
            }
            catch (Exception ee)
            {
            }

        }
+5
source share
4 answers

This is an assumption, since there is a lot of reference code that we cannot see from this fragment published in the question.

I assume that you are not processing database connections correctly ( DB_Connection_s) for several reasons.

A) Fixed via reset

    I get the following errors frequently , and i had to restart the IIS or 
    republish to fix the problem temporary`

, , , , .

B)

DB_Connection_s, , , , , ( , ).

, . , .Dispose(), . , , , IDisposable, using. using Dispose. IDisposable, ( ) , , .Dispose() .

:

@just_name - , , , . ~DBConnection(), , .Close(), .

i)

, , . " - undefined". - MSDN Object.Finalize. , , , , , .

ii) Dispose

.Close() , . , , , , , .

iii) Dispose

a)

, , . using(){} DBConnection. , :

DBConnection IDisposable,

public class DBConnection : IDisposable
{
  //other methods already in here
  public void Dispose()
  {
   //Close_Connection(); Call this if you want, but you MUST call 
   //.Dispose on your connections
   connection.Dispose();
  }
}

DBConnection :

using( var DB_Connection_s = new DBConnection() )
{
 //todo: interact with database connection
}

.Dispose(), }, . , , , - .

, , , .Close() .Dispose() , , , , .Dispose() not .

b) .Dispose()

.Dispose() . , using(){}. , , .

:

IfxDataReader ifxDataReaders = DB_Connection.DBCmd.ExecuteReader(); 
if (ifxDataReaders.Read()) { 
 item = (int)ifxDataReaders["emp_num"]; 
} 
ifxDataReaders.Close();

. -, .Close(), . -, try, , ifxDataReaders , . .

, , .Dispose . ( .Dispose()).

using(IfxDataReader ifxDataReaders = DB_Connection.DBCmd.ExecuteReader())
{
 if (ifxDataReaders.Read()) { 
  item = (int)ifxDataReaders["emp_num"]; 
 } 
}
+9

, Error Message:Request timed out, Error Message:Thread was being aborted.. , , , , Response.Redirect("aPage.aspx"), Try-Catch.

, "False" EndResponse Response.Redirect, :

try {
    // [... SOME CODE ...]
    Response.Redirect("aPage.aspx", False)
} catch (Exception e) {
    // [... YOUR CATCH ...]
}
+2

: ? 30 ? ?

, , 30 .

? , .

+2

More articles:


All Articles