Telerik heirarchical grid not supporting Large data

[ramana]

I have hierarchical rad grid with 3 levels of data. The 2nd level grid showing more than 15000 records for each parent record. I have paging applied to all the grids.

I am getting below error when I drill down at first level.

    Sys.WebForms.PageRequestManagerServerErrorException: Object reference not set to an instance of an object.

I don't have any problem when the 2nd level grid has few records less than 500 records, if the count exceeds to more records I am getting above issue.

I tried increasing HttpRequest length. disabling the view state and saving the view state to disk. nothing helped.

What I could conclude is the issue is because of large number of records

Any help is appreciated.

[Daniel]

Hello Ramana,

I'm not able to reproduce this problem on my end. Can you provide a simple demo with dummy data that demonstrates this issue?

Regards,
Daniel
Telerik

[ramana]

Issues is in my code. I am using Task parallel library for building the List datasource. It is creating problems some times.
fixed the problem by utilizing congurrentbag rathere than list.