Monitor at pool keeps going up and down (flapping) continuously.

Hi All,

Need urgent help, I have pasted the logs below wherein monitor keeps going up and down (flapping) continuously. I am not able to find that, is it related to F5's configuration issue or server end issue?

mcpd[5768]: 01070638:5: Pool /ap-$$$$-132/p-.net-10100 member /ap-$$$$-132/node:10100 monitor status down. [ /ap-$$$$-132/CSS-keep-alive: down; last error: /ap-$$$$-132/CSS-keep-alive: Response Code: 200 (OK); Unable to connect; No successful responses received before deadline.; Response Code: 404 (Not Found) @2017/06/30 09:08:06. ] [ was up for 0hr:0min:16sec ]