Getting error while running SSRS report in SharePoint 2010

Question

Hi,
I am getting below error while running a SSRS reports in SharePoint. Your help will be appreciated
Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET4.0C; .NET4.0E)
Timestamp: Wed, 5 Nov 2014 11:58:42 UTC
Message: Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server. The status code returned from the server was: 503
Line: 5
Char: 62123
Code: 0
Thanks,
Manjunath

Answer 1

Hi,
According to your post, my understanding is that you get error while running SSRS reports.
Basically, If the Request Management service is enabled, it manages all incoming requests by evaluating logic rules against the user requests in order to determine what\which action to take and which machine or machines (targets) in the farm should handle
the request.
By default the Request time out value for Request Management service are as follows,
RequestTimeout                    : 00:01:40
RequestExecutionTimeout       : 01:00:00
So the error throws from RM service for those reports who take more than 1 minute to generate the report.
To solve this issue, we can stop the Request Management service.
Or increase the time out
value by making use of following PowerShell  script.
$waUrl = "URLofWEbApp"
$wa = Get-SPWebApplication $waUrl
$rmSettings = $wa | Get-SPRequestManagementSettings
$req=$wa.RequestManagementSettings
$timeout2= New-TimeSpan -minutes 5
Sreq.Requesttimeout=$timeout2
$req.update()
For more information：
http://blogs.technet.com/b/sajiths/archive/2014/08/19/ssrs-reports-timed-out-with-39-503-39-error-sharepoint-2013.aspx
Thanks & Regards,
Jason
Jason Guo
TechNet Community Support