502 - web server receive an invalid response

Question

Hi All,

 

I need quick help for these issues(502 - webserver receive an invalid response while acting as a gateway or proxy server), we have developed Data Migration Tool for Migrate data from one DB to another DB using Asp.net with SQL and hosted on iis server and we are inserting 1k or 2k records then after 1 min throwing that proxy error. Please kindly have a look.

 

 

Thank you In Advance