.net - InProc Session Usage In Server Farms?
Jan 31, 2011
I'm reading ASP.NET 4 Unleashed and I came to this sentence. "When Session state is stored in-process, it is stored on a particular web server. In other words, you can't use in-process Session state with a web farm."I'm building a web app that uses and depends on storing dictionaries in the session. Now I know that there's some problem with serialization of dictionaries when using sessions but with InProc sessions, there's no serialization so I thought I'd be ok. But now I'm wondering: will I have any nasty surprise when I go to host my application?
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Nov 12, 2010
There are reams of info out there about things causing InProc session to drop session objects, but that's not what's happening here. We're missing individual variables within stable InProc session objects, and are not sure whether they're not being written or being lost after a successful write. I've confirmed with WinDBG that the sessions are live and contain some, but not all, of the data written to them.
Guid g = System.Guid.NewGuid();
this.Context.Session.Add(g.ToString(), result.ImageData);
output.Write("<img src="display.aspx?id=" + g.ToString() + "">");
This code is pretty straightforward, and it works flawlessly in Test. In Production, under heavy load, though, it fails ~1% of the time. If Mr Smith visits the site and attempts to display 4 pieces of image data, 2 of them might be saved in his session and two of them be lost. The InProc session object for Mr. Smith exists. The traffic logs show he clicked 4 times, each with a different id param. But there are only 2 guids in his InProc session object, instead of 4. The 2 session objects we did capture do correspond to 2 of the id's shown in the traffic log (his 1st and 3rd clicks.) The traffic logs for his 2nd and 4th clicks, though, show a guid id that's not in his InProc session object.
Lines 1&3 of the above code obviously worked for those 2nd and 4th clicks, or he'd not have had the id in the URI for him to click. Line 2, however seems to have failed silently in some way. If any exception had been thrown, I'd expect we'd not ever have arrived at line 3. I can't see any way for the user to receive the guid id, but the session to fail to have it. The other possibility is line 2 worked successfully, but the variable later disappeared, how I cannot even imagine.
Details:
ASP.NET v3.5
IIS 6
No Web Gardening
We're running a web farm, but users constantly return to the same server. I'm researching now whether there's any way users might be slipping off to the other server.
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Oct 7, 2010
I'm considering moving our web app session storage from In Proc to State Server. Can anybody give any figures as to the performance difference?
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Oct 21, 2010
I've recently been tasked with fixing a rather nasty bug resulting from the misuse of session state. We have an asp.net web application that runs on a single sever using inproc session state. The basic design is that a typed dataset is loaded from the database and stored in session state using a common session variable name like Session["dataset"] = dataset. After the data is stored in the session the user edits the data, dataset is retrieved from the session updated and sent to the database for updating. This type of data editingstoring is used across multiple webforms that basically do the same thing. All is good until a user tries to launch a second instance of the application and data stored within the session variable can get mixed up. Here are the possible fixes that I've been able to find
Set sessionState cookieless="false" (every new instance gets a unique session id) PROS - easiest solution, almost no code changes needed CONS - guid in url, user can edit guid, guid can be copied Use a custom session key for every instance (pass a session key around and combine it the "dataset" + session key name so that each instance has a unique session variable) PROS - no guid in url CONS - most amount of code changes, possibly fragile Remove the session variable (Load the dataset from the database a second time for editing) PROS- frees up server resources, no longer dependent upon session state CONS - performance hit, high amount of code changes
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Nov 30, 2010
how to made session timeout in INPROC mode
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Mar 4, 2011
Is it possible to build a fully customized Session State Mode instead of using Inproc or SQLServer?
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May 25, 2010
like the title shows I want to know what is the difference between "InProc" & "stateServer" mode in SessionState on ASP.NET.
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Dec 22, 2010
usage of asp.net server controls in asp.net mvc. The question is like can we use asp.net server controls in the asp.net mvc? If asp.net server controls cannot be used in asp.net mvc is it a limitation of asp.net mvc model? If it is a limitation then how to use more number of controls(like asp.net server controls)
I have a question in the controller like, controller defines controllerActions. If the controller action method is non-action method, then how to call that nonaction method?I have one more question like, usage of HTTPPost in mivc?can we have a button click action without a HTTPPost attribute to my controlleraction method?
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May 25, 2010
I have the dataset. in this i am having total 20 tables with huge amount of data..I want use this data over all the page..so where i can keep this data..
before i used viewstate but the viewstate data is render to page every postback ..so this time the page size is increasing(interanlly viewstate is rendered to page)..so performence wise it was very slow..
Now i change my logic insted of viewstate to i used Globel Dataset on Page Level.. now the performence wise better than viewstate..
i used Like shared dsControls as Dataset at top of the page..so every time i use this dataset..
my quesation is session is better or Globel variable is better way use in my situavation..
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Dec 20, 2010
I am using ASP.Net 4.0 and MVC 2.0 for an web application. As my project requiremrnt I have to use the server side control in my application which is not possibl in noraml case. Ideally I want to use AdRotator control and DataList control.I saw few samples and references in CodePleax MVC ControlLib howwver I found it is very less useful. Can someone tell how to utilize theese controls in ASP.Net application along with MVC. Note: Please provide functionalities related to the AdRotator and DataList controls not the equivalent functionalities
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Mar 22, 2011
Why Session_End event occurs only in "InProc" mode not in "State Server" and "Sql Server"?
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Feb 11, 2010
Is there a way to get load information on Application Server? How much memory or CPU is being used at a given point? I want to either 1. Limit users to use specific functionality of ASP.NET 3.5 application or 2. Deny users from accessing the application saying "Server is busy at the moment"
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Jul 31, 2010
Environment.WorkingSet incorrectly reports the memory usage for a web site that runs on Windows 2003 Server.(OS Vers: Microsoft Windows NT 5.2.3790 Service Pack 2, .NET Vers: 2.0.50727.3607)
It reports memory as Working Set(Physical Mem.): 1952 MB (2047468061).
Same web site runs locally on Windows Vista with a Working Set(Physical Mem.): 49 MB (51924992).
I have limited access to the server and support is so limited.
so i have computed the total memory by traversing with VirtualQuery.
Total of pages with state: MEM_FREE is 1300 MB.
(I guess server have 4 GBs of RAM and PAE is not enabled, max user mode virtual address is 0x7fff0000.)
So, i know working set is not only about virtual memory. But, is it normal to have such a high working set while its very low on another machine?
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Dec 2, 2010
I am tinkering with Web Gardens in ASP.NET with IIS 6.0. Multiple sources (Source1 Source2) explain how InProc Session does not fly well with Web Gardens. I built a program to prove it, but the results are difficult to explain. I set the Maximum # of worker processes to 1000 in IIS.I create a web app that stores a string in Session and retrieves the value with a button click. Run web app in IE, FF, and Blackberry browsers.
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Jan 18, 2011
I have an asp.net site that's basically a giant form for users to submit weekly turkey information for their starter and finisher houses. I use session variables so the information is viewable to a "Review" page. There have been 3 instances where the users would try to submit their information but kept losing their information. As far as I know, they are not letting the page sit idle for more than 20 minutes. I tested it out myself and lost session variables after less than 10 minutes. My sessionState mode is InProc. Should I look into switching to StateServer? If so, how would I do this?
[Code]....
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Oct 11, 2010
Microsoft Visual Studio 2010 was being used along with SQL Express for website development on the Operating System, Windows Server 2008 R2 Enterprise Edition of Intel Xeon CPU @ 2.13 GHz (2 Processors) containing 12 GB RAM with 64-bit Operating System. Website was developed along with the databases of SQL Express with the help of Visual Studio. Whether the developed website along with the databases may be used on the Operating System, Windows 7 of 64-bit? The website will used within Intranet. Which Operating System and configuration to be used for the Intranet Website?
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Oct 11, 2010
I use some session variables to get the job done(shopping cart, etc) but it is not stable..manytimes I get no items in session object and other times(refreshing the page) I get missing data...I downloaded the entire site code to my local pc and debugged it and run it succesfully without any session data missing...When I run it in the server, I get bad session again: no products in shopping cart or products with missing quantities...
The same website runs smoothly in our production server too....The problem is with our development server...
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Oct 7, 2010
I have problem is that when i force to clear session so it remove all session on to server. i mean i open website at 2 systems and one system logout website so 2nd automatically logout.i dont know when is the problem. i m using Session.Abundent for current session.but it clear all.
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Dec 7, 2010
Have not run the ASP.NET Development Server for a while. Today I copied a production website to my workstation and ran it with VS 2008. The following error message popped up. What is the problem with the ASP.NET development Server on my workstation? The website on the Production server still ran okay.Unable to make the session state request to the session state server. Please ensure that the ASP.NET State service is started and that the client and server ports are the same. If the server is on a remote machine, please ensure that it accepts remote requests by checking the value of KEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesaspnet_stateParametersAllowRemoteConnection.
If the server is on the local machine, and if the before mentioned registry value does not exist or is set to 0, then the state server connection string must use either 'localhost' or '127.0.0.1' as the server name.
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Nov 3, 2010
We recently migrated a web app from one Prod server (Prod 1) to another server (Prod 2). There is a session varialbe checked inside the page load event of the default master page. I have enabled session state both in web.config as well inside the pagedirective. The compilation went through without any issue. The web app is also running just fine on the server but the log file keeps logging a warning message. There is no run time error.
"System.Web.HttpException: Session state can only be used when enableSessionState is set to true, either in a configuration file or in the Page directive. Please also make sure that System.Web.SessionStateModule or a custom session state module is included in the <configuration><system.web><httpModules> section in the application configuration."Any idea why this is happening on one server vs other?
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Aug 17, 2010
I always have problem with the conception of flush who knows exactly what it means eg:
[Code]....
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Dec 6, 2010
i want to make some questions about asp.net MVC,actually,i am not familiar with web developing.
But,i am assigned for web part.we are using like this.first,we create get set
properties for person data
public class Person
{
public int personID {get;set;}
public string personName {get;set;}
public string nric {get;set;}
}
and then after login,we put data in that class and we use RedirectToAction method like this,
return RedirectToAction("profile","person",new { personID = Person.personID});
it's working normally,but,parameter are shown at URL,how i hide them and also can i hide action name?
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Oct 19, 2010
how we write this code of C# in vb.net .i want to right this code in vb.net
[Code]....
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Feb 9, 2010
We have developed one Web Application which is running in only one server. Now client needs our application be in two servers. So if one of the servers down then another server should be working. We are using sessions in our application. Now the problem is how to transfer the session data from one server to another??
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Nov 27, 2010
We have a web application based on asp.net 1.1. We deployed it on a web server but there is a problem about it. In the webserver sometimes cpu usage is increasing to 100% and outofmemory exception is occuring.
I think there are some wrong code inside the project but i don't know where it's.
Now, i want hear your advices about how to find problem and what kind of codes make cpu usage increased.
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