I am using http_async_client and dispatcher modules of Kamailio. 

Here is scenario!

http_async_client makes calls to an API to get groupid upon which dispatcher sends calls. 

I am using SIPp to generate calls with 100 cps. I see some calls being failed with an error cause, 483 Too Many Hops. 

Taking the trace shows Kamailio routing some calls to itself. 

I think this is not a configuration issue since all calls are same(follow same logic) and some calls get failed. 

Any pointer is much appreciated. 

Best Regards.