F5 LTM VIP Sending TCP RST to Client

Hi, I am trying to set up the environment for Hadoop platform in the back-end. Configuration is Simple and Provided by the Hadoop Vendor. Name, IP, Port 21050 and SNAT and Pool (TCP Monitor). When we initiate the traffic, then the First-Second try works fine, but then on the Third try, it starts stops working, On the other hand, I can see that on the TCPDUMP F5 VIP is sending RST packet (Severity Warning - Flag) to the Client.

 

Can someone please explain me this behavior?