Intermittent Html5 Report Errors

[Pat]

I'm having an intermittent issue where calls to the reporting REST API service are failing with a 500 error (below).

The steps that are occurring are:

1. Report run is initiated.
2. Can see successful POST to the instances URL: ~/api/reports/clients/113946-7092/instances.  Responds with: {"instanceId":"105138-bc13"}.
3. Can see successful POST to the documents URL: ~/api/reports/clients/113946-7092/instances/105138-bc13/documents. Responds with: {"documentId":"114313-ce58114313-a5ac"}
4. Can see unsuccessful GET to the info URL: ~/api/reports/clients/113946-7092/instances/105138-bc13/documents/114313-ce58114313-a5ac/info.  Responds with the below 500 error.

If I keep clicking the Preview button (with the same parameters set), eventually, one of the requests will complete successfully and the report runs.  Otherwise, the above happens.

Has anyone run into this before?

500 error being returned:

{
    "message": "",
    "exceptionMessage": "Invalid report typeException has been thrown by the target of an invocation.",
    "exceptionType": "Telerik.Reporting.Services.Engine.DocumentRenderException",
    "stackTrace": "   at Telerik.Reporting.Services.Engine.Document.GetDocumentInfo() in c:\\temp\\reporting\\RBuild-28809\\Reporting_Build\\Source\\Code\\Telerik.Reporting.Services.Engine\\Document.cs:line 181\r\n   at Telerik.Reporting.Services.Engine.ReportEngine.GetDocumentInfo(String clientID, String instanceID, String documentID) in c:\\temp\\reporting\\RBuild-28809\\Reporting_Build\\Source\\Code\\Telerik.Reporting.Services.Engine\\ReportEngine.cs:line 391\r\n   at Telerik.Reporting.Services.WebApi.ReportsControllerBase.GetDocumentInfo(String clientID, String instanceID, String documentID) in c:\\temp\\reporting\\RBuild-28809\\Reporting_Build\\Source\\Code\\Telerik.Reporting.Services.WebApi\\ReportsControllerBase.cs:line 291\r\n   at lambda_method(Closure , Object , Object[] )\r\n   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters)\r\n   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute(Object instance, Object[] arguments)\r\n   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Controllers.ExceptionFilterResult.<ExecuteAsync>d__0.MoveNext()"
}

[Stef]

Hello Pat,

The INFO requests is sent by the viewer to check the status of the report that is processed and rendered on the server machine - cache management.
The response contains an error pointing a problem with resolving types - the reporting engine uses reflection to create instances of types specified by assembly qualified name (TypeReportSource, Object/EntityDataSource), or rendering the report in the selected format.

As a first step, test running the Report Designer's design-time preview of the report to verify it can be rendered successfully. Then, check the settings of all TypeReportSource, Object/EntityDatasource components and if the assembly qualified names you pass ae correct (names are case sensitive and in a format like <namespace>.<class>, <assembly>.


In order to provide you more accurate suggestions, please open a support ticket and send us a demo project that reproduces the problem.

Regards,
Stef
Telerik by Progress

[Travis]

I am also getting this issue randomly.. Any update on this. Below is my error.

{"message":"","exceptionMessage":"Invalid report typeException has been thrown by the target of an invocation.","exceptionType":"Telerik.Reporting.Services.Engine.DocumentRenderException","stackTrace":"   at Telerik.Reporting.Services.Engine.Document.GetDocumentInfo() in c:\\temp\\reporting\\RBuild-28199\\Reporting_Build\\Source\\Code\\Telerik.Reporting.Services.Engine\\Document.cs:line 181\r\n   at Telerik.Reporting.Services.WebApi.ReportsControllerBase.GetDocumentInfo(String clientID, String instanceID, String documentID) in c:\\temp\\reporting\\RBuild-28199\\Reporting_Build\\Source\\Code\\Telerik.Reporting.Services.WebApi\\ReportsControllerBase.cs:line 291\r\n   at lambda_method(Closure , Object , Object[] )\r\n   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters)\r\n   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Controllers.ExceptionFilterResult.<ExecuteAsync>d__0.MoveNext()"}

[Travis]

Whats really weird is that when I am debugging using IIS, it works. But when I stop debugging, but the iis process is still running it errors out..

[Travis]

Whats really weird is that when I am debugging using IIS, it works. But when I stop debugging, but the iis process is still running it errors out..

[Katia]

Hi Travis,

You can check an update in the support ticket #1095309 you opened on the same question:
"As my colleague suggested in this forum post, this error indicates that there is a problem with resolving types. The reporting engine uses Reflection to create instances of types specified by assembly qualified name (TypeReportSource, Object/EntityDataSource).

You can test if this issue is reproducible when the report is previewed in the Report Designer. After that, check if assembly-qualified names you specify for TypeReportSource or Object/EntityDatasource components are correct: <namespace>.<class>, <assembly> (case-sensitive).
You can use Type.AssemblyQualifiedName property to get the assembly-qualified name of the type."

We can provide more accurate suggestions after checking a sample project with your current settings (you can attach it to support ticket #1095309).


Regards,
Katia
Telerik by Progress