AMS intermittent http response 503

Hi,

I am currently using AMS with Apache server. I am trying to play a HDS video with multiple fragments, when I seek to a given position sometimes the server returns a SERVICE TEMPORARILY UNAVAILABLE error in the HTTP response (503) to one of the requests. Can someone please help. I am desperately in need of some information that might help me. Tried google-ing for this issue, but nothing useful came out of it.

Really appreciate the help!