Session variable scope in a Load Balanced environment

[Vidyadhar Joshi]

I have the following scenario in a true load balanced environment (without
sticky sessions):

There are 2 ASPX pages. I want to pass an object from the first page to the
second page. On the btnContinue_Cli ck event of Page1.aspx, I create the
object and store it in a session variable. The next statement would be
Response.Redire ct("Page2.aspx" ). The code appears like this:
private void btnContinue_Cli ck(object sender, EventArgs e)
{
OrderInfo orderInfo = new OrderInfo();
orderInfo.Prope rty1 = "Property1" ;
orderInfo.Prope rty2 = "Property2" Session["orderInfo"] =
orderInfo;
Response.Redire ct("Page2.aspx" );
}On Page2.aspx, on the Page_Load event, I retrieve the object from the
Session variable and put it in a OrderInfo object and then remove the
session variable. The code looks similar to below:
void Page_Load(objec t sender, EventArgs e)
{
OrderInfo orderInfo = new OrderInfo();
orderInfo = (OrderInfo)Sess ion["orderInfo"];
Session.Remove( "orderInfo" );
}My understanding is - creating the object, putting it in a Session
variable, redirecting to another page and retrieval of the object in the
second page - all these happens in one server call. I don't care if the
Session variable is lost after this call. That is the reason I remove the
variable from session state.

My question is - are there any chances that the Session variable will lose
its value in the above scenario because of load balancing?

Any help will be appriciated.

Thanks!

[intrader]

On Wed, 28 Dec 2005 11:57:17 +0530, Vidyadhar Joshi wrote:

I have the following scenario in a true load balanced environment (without
sticky sessions):

There are 2 ASPX pages. I want to pass an object from the first page to the
second page. On the btnContinue_Cli ck event of Page1.aspx, I create the
object and store it in a session variable. The next statement would be
Response.Redire ct("Page2.aspx" ). The code appears like this:
private void btnContinue_Cli ck(object sender, EventArgs e)
{
OrderInfo orderInfo = new OrderInfo();
orderInfo.Prope rty1 = "Property1" ;
orderInfo.Prope rty2 = "Property2" Session["orderInfo"] =
orderInfo;
Response.Redire ct("Page2.aspx" );
}On Page2.aspx, on the Page_Load event, I retrieve the object from the
Session variable and put it in a OrderInfo object and then remove the
session variable. The code looks similar to below:
void Page_Load(objec t sender, EventArgs e)
{
OrderInfo orderInfo = new OrderInfo();
orderInfo = (OrderInfo)Sess ion["orderInfo"];
Session.Remove( "orderInfo" );
}My understanding is - creating the object, putting it in a Session
variable, redirecting to another page and retrieval of the object in the
second page - all these happens in one server call. I don't care if the
Session variable is lost after this call. That is the reason I remove the
variable from session state.

My question is - are there any chances that the Session variable will lose
its value in the above scenario because of load balancing?

Any help will be appriciated.

Thanks!

In my experience, load balancing (without sticky), will create problems
for you.
You will also have problems with the Session being dumped due to timeout,
restarts of the server, etc.