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BuildManager.GetType returns null until application pool recycles

Posted By:      Posted Date: August 29, 2010    Points: 0   Category :ASP.Net
Our application uses the Enterprise Library's PropertyProxyValidator class to validate user input (v4.1 - Oct 2008).  On occassion, the code will raise an exception saying the source type cannot be found.  This error persists until the application pools recycle at night, at which point everything works again.  It tends to only affect one of the web front ends at a time (there are two). I tracked down where the exception was being raised, and this is the section of code:Type IValidationIntegrationProxy.ValidatedType { get { if (string.IsNullOrEmpty(this.sourceTypeName)) { throw new InvalidOperationException(Resources.ExceptionNullSourceTypeName); } Type validatedType = BuildManager.GetType(this.SourceTypeName, false, false); if (validatedType == null) { throw new InvalidOperationException( string.Format(CultureInfo.CurrentUICulture, Resources.ExceptionInvalidSourceTypeName, this.sourceTypeName)); } return validatedType; } } (As you can see, the value for this.SourceTypeName is shown in the exception and I've checked that it matches exactly.) We have never been able to reproduce this exception and at this point don't have any ideas left as far as causes.  For a while, my suspicion was that it was related to the Temporary ASP.NET Files folder.  The last

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Type myType = a.GetType("Class1"); returns NULL

I created a class Class1 and generated a strong named assembly. Following is my simple class. But when i try to load this assembly using 
Assembly.Load() - > Type.GetType() returns null. Cannot figure out why? Below is the code for Assembly.Load
namespace LoadAssemblyTest
    public class Class1
        public void GetDriveInfo()
            Console.WriteLine("Drives: ");
            foreach (DriveInfo di in DriveInfo.GetDrives())
                Console.WriteLine(" {0} ({1}) ", di.Name, di.IsReady);

            Console.WriteLine("Press the drive letter to view the folder: ");
            ConsoleKeyInfo drive = Console.ReadKey(true);
            DirectoryInfo dir = new DirectoryInfo(drive.Key.ToString() + @":\");
            foreach (DirectoryInfo dirInfo in dir.GetDirectories())
                Console.WriteLine("\n " + dirInfo.FullName);

            Console.WriteLine("Press \'q\' to quit the sample.");
            while (Console.Read() != 'q') ;



Linq to SQL returns null for DateTime fields.


I have a linq to sql entity class in which I declared some DateTime fileds like this:

[Column(DbType = "smalldatetime")]
public DateTime? StartDate { get; set; }

And this is how I fetch data form repository:

return repository.Logs.OrderByDescending(l => l.LogID).FirstOrDefault();

All non DateTime fields are filled properly but all datetimes are null.

[Column(DbType = "smalldatetime")]

        public DateTime? StartDate { get; set; }

How to Keep conntion pool and application pool for certain time?


In my current system MOSS and windows 2003, I do not know where to see connection pool live time ? and Application pool live time?

How to keep live these for certain number of hours? Where can I change? Is it possible to keep minimum number of connection pool live always?


Thanks for help in advance.


Resume SharePoint Services Web Application and returns code 1387 error


Hello everyone! Newbie here. I would like to ask how to start the SharePoint Services Web Application on (WSS3.0,internal database, stanalone users) without getting error 1387 ?

I would love to provide more information regarding this issue but what I got is error 1387 displayed in the browser.

I look forward to seeing you guys feedback from your expertise angle.



Registry OpenSubKey returns null

Hi,It seemed to be the right place to post to.My problem is that when I try to read registry key, I get null value, even if it exists (regedit shows it exists).Application is windows service with Log On As Local System and registry key im trying to read is in HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSIDOn my development machine (x64 win7) it works fine. But in live server (x64 windows server 2008 r2) I get NULL. These operating systems should have similar policies or does Local System on server 2008 have any restrictions i should know about?RegardsMax

How do use an existing application pool when creating a new web application on Moss-2007 SP2

I have been asked to try and reduce how much memory is being used on our Moss 2007 SP2 farm by reusing existing web application pools. My problem is that when you go through creating a new webapplication and choose the option labled "Use existing application pool" under the section labled "Application Pool - Choose the application pool to use for the new web application" I can only select from a list of three application pools "(Default App Pool (network services), Shared Services, and OfficeServerApplicationPool (NetworkService)" The drop down list does not mention any of the other app pools I have created for previous web applications. My question is this, how do I pick an existing web application pool that I have created previously, rather than keep on creating new application pools for every new web application I create? The farm consists of 3 FE servers 1 search, 1 Query and a Clustered 64bit SQL backend running SQL 2005 all running 64bit W2003 server R2 Thanks for any help you can provide on this. Mr T.    MR T

PowerPivot - New Application Pool vs. Existing Application Pool

When creating a PowerPivot Service Application I am giving two options: "Use existing application pool" or "Create new application pool" and if I join an existing pool which one should it be "SharePoint Web Services Default" or "SharePoint Web Services System"? Now I understand isolation and other technical reasons but what I want to understand is what you guys in the field that run SharePoint Farm would want me to configure and if that does not cause me any scale or performance issue we are good.  If I want to run outside most SharePoint standards I better have a good reason. One note I just missed was: "While this may be a good security best practice, you may still want to use an application pool and/or managed account that is tied to your SharePoint Farm account. As will be noted in Chapter 9, for the PowerPivot data refresh feature to work, the PowerPivot Service Application and PowerPivot System Service requires Farm account rights to access the Secure Store Service database." -- PowerPivot for Excel and SharePoint, page 217 So folks what you would suggest or better yet, how would you like it configured within your farm. Thanks. Denver, CO

FindControl returns null

I am trying to fetch two Labels within a Repeater element to attach data to; which Label is assigned which Data Field depends on the result of a Radio Button List, hence why I need to fetch them in the code behind. This is the ASP.NET code: <asp:View ID="vwSportType" runat="server"> <table> <tr> <td rowspan="2"> <span class="boldtext">Select type of sport:</span><br /><br /> <asp:ListBox ID="lbType" runat="server" AutoPostBack="true" OnSelectedIndexChanged="lbType_OnSelectedIndexChanged" Height="300px" Width="12em"> </asp:ListBox> </td> <td width="70%"> <span class="boldtext">Show by: <asp:RadioButtonList ID="rbSportType" runat="server" RepeatDirection="Horizontal"> <asp:ListItem Text="Date, Sport" Selected="True" Value="0"></asp:ListItem> <asp:ListItem Text="Sport,

Enabling Windows Authentication to SQL Server using Application Pool Credentials

I have created a WCF Service (VS2008), an application pool account which has the access to the SQL Server(in remote machine). Configured the App Pool account to the Virtual Directory in IIS (Version 6.0). Once I browse through the SVC file, I can see the WSDL file. I have the "Windows Authentication" and the 'Anonymous authentication" Checked in the Properties for the Virtual Directory. But when I access service through Client, I get "The HTTP request is unauthorized with client authentication scheme 'Anonymous'. The authentication header received from the server was 'Negotiate,NTLM'.". Binding that is being used is HTTPBinding. I have set the Identity Impersonate to True as well. Bottom line is - I need to use the App Pool account to connect to the SQL Server. Could some one please help me in this?  

Custom UsernamePasswordValidator causes IIS Application Pool to hang.

I have a WCF service hosted in IIS (IIS 7 with .NET 3.5 SP1) that uses a custom UsernamePasswordValidator to validate message credentials against a database. The problem is that it works for a while, but over a period of time IIS stops responding to all client requests until the application pool is recycled. The IIS worker process has some requests that get stuck in the "AuthenticateRequest" pipeline state of the "ServiceModel" module. In my testing, I can consistantly reproduce the problem by forcing a client to create a new service proxy with a different username and password and calling the WCF service every few seconds. To troubleshoot I created a new project and removed all of the authentication code in the Validate function so that the UsernamePasswordValidator will accept any username and password combination without throwing an exception, but IIS still hangs: namespace WcfTestService { public class CustomValidator : UserNamePasswordValidator { public override void Validate(string userName, string password){//code removed for testing} } } If I remove the ServiceCredentials node from the Service Behavior, IIS doesn't hang anymore, but there is no user validation that takes place either, which is a problem. Here is the service binding configuration: <services> <service name=&

IIS Application Pool Recyle

Currently I have Sharepoint 2010 installed and it's taking about 30 seconds or so to open it up initially in the morning.  I'm assuming it's application pools are being recycled sometime during the night time.  What will be the easiest way to configure the server, so that I can minimize the slowness in the morning? Thanks,

Cache settings on shared application pool

I have several web applications on a server using the same application pool. The worker process usually takes a lot of ram but usually only from one application. I can successfully limit the cache usage by setting "PrivateBytesLimit" in web.config file when the application uses it own dedicated application pool. Does anyone know how this setting will be applied when using shared application pool? Is it per application, per worker process or per application pool? Also if it is not per application which setting from which application will be applied?

Why this returns null

hi friends, i have a table AppUser.UsersUserRole that has the following structure: idx auto ur_id int -- user role id id int    -- user id that has the following data:  From Drop Box  when i ran query to returns a csv: declare @csv nvarchar(max) select @csv = @csv + coalesce( convert(nvarchar(max), ur_id) + ',','' ) from AppUser.UsersUserRoles where id = 28 select @csv it returns:  From Drop Box  but there are three records for 28, why it displays null, how do i fix this? thanks

SCOPE_IDENTITY() returns null after paramerized INSERT


I have a very simple database, without any triggers at this point. One of my tbales has a auto increment key (IDENTITY field). As the record has a string attribute, which valeu is received from the user, I insert a new records with a parametized INSERT statement. After insertion I try to fetch the new record's ID with the sttament SELECT SCOPE_IDENTITY(), but ti return null - while SELECT @IDENTITY and SELECT IDENT_CURRENT returns the valid values.

Moreover, if - for testing purposes - I execute the same insert without parameters, (i.e. providing the string value directly in the INSERT statement), then even SCOPE_IDENTITY() returns the correct value.

I didn't find any reference in the documentation regarding such restriction. Is is a known bug or the result of some misunderstading?

Application pool shutdown sometimes


I don't know if this is the right place to post, anyway:

Once in a while the application pool of my website has stopped. After taking a look into the Windows logs, In can see in the System log the following: first I see 5 warnings, and then an error. The warning is:
"A process serving application pool 'domain.com' suffered a fatal communication error with the Windows Process Activation Service. The process id was '1568'. The data field contains the error number."

The process id is different for all 5 warnings. Then the error message is:
Application pool 'domain.com' is being automatically disabled due to a series of failures in the process(es) serving that application pool.


The warning:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <Provider Name="Microsoft-Windows-WAS" Guid="{524B5D04-133C-4A62-8362-64E8EDB9CE40}" EventSourceName="WAS" />
  <EventID Qualifiers="32768">5011</EventID>

ContextUser null on classic pool with IIS7


I set impersonation and windows on my IIS7.

But when I log on and I get an error my user context is null. I'd rather keep it on a classic pool to keep the users working on the site until I can make a full move to integration.

Anyone know what I need to do to get the HttpContext.Current.User equal to the autenticated user?

Here's a snipper from the event viewer

User host address: ::1
    Is authenticated: False
    Authentication Type:  
    Thread account name: NT AUTHORITY\NETWORK SERVICE
Thread information:
    Thread ID: 8
    Thread account name: NT AUTHORITY\NETWORK SERVICE
    Is impersonating: False

Shows it's not impersonating event through I set the value.

Any help appreciated


Downloading a document from a sharepoint site to local file system, copy web service returns null

Hi Guys,
               I am trying to get this done for the last 2 days and I am still banging my head to the wall.
All I need to do is to download files from my sharepoint site library that uses integrated windows authentication. I was using copy webservice : getItem method to accomplish this.

CopyService.GetItem(copySource, out myFieldInfoArray, out myByteArray);

Problem : myByteArray is always returned as NULL

Note: I have tried the same with another site that uses forms authentication but the result was the same (NULL !!)

This is my code:


Copy copy = new CopyService.Copy();


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