Rad Chart in Rad Grid View

[Arvind]

Hello Telerik Team,
We have an issue with Rad Chart in the Rad Grid View, we have added the following settings in the Web.Config 
 <httpHandlers>
<add path="ChartImage.axd" type="Telerik.Web.UI.ChartHttpHandler" verb="*" validate="false" />
  </httpHandlers>
<handlers>
<add name="ChartImage.axd_*" path="ChartImage.axd" verb="*" type="Telerik.Web.UI.ChartHttpHandler, Telerik.Web.UI, Culture=neutral, PublicKeyToken=121fae78165ba3d4" preCondition="integratedMode" />
  </handlers>

When we check in the debug mode and host in the Local IIS, we do not get any rad Chart Error and when we host in the Windows Azure with one Instance we do not get Rad Chart Error, but when we deploy in the Windows Azure with two instances, we are getting the rad chart error that is there in the attachment, Please find the attachment.

Please tell us a fix that will solve this Issue.

Thanks,
Arvind.

[Ves]

Hi,

Here is a possible problem in web-farm scenario. It would be an issue if the page is served  and therefore the chart image is generated by one machine and the next request for the image itself is served by another machine. Then this second machine will not be able to find the image in the session. The solution would be to implement State server or SQL server session state mode or sticky session, ensuring that all the request from one user will be handled by the same machine.

Best regards,
Ves
the Telerik team