角度http调用返回状态0状态文本错误在40到45次成功调用后服务器上的并发调用

I have hosted my website on godday server. I have used datatable ajax server side pagination and place searchbox above datatable which is used datatable fnfilter.

Let's say for example I want to search "abc" as soon as I type a it will make http call to server and get data. Then type next character b again it will call to server. It works fine on first 40 to 50 request with status successful after then it will generate status failed and status code 0 and my subdomain is stop responding for 2 to 5 minutes. Meanwhile I try to call webservice through rest client it is working fine irrespective of sub domain not reachable.