Controller failed to connect to LG after running for about 40 min

Hi,

I am trying to run a load test from controller. We are using MI Listner to connect to LG. At first I see that Controller is connected to LG and starts up fine. After about 40 min into the test, I get error message saying LG not responding. When checked the the start up logs for LR agent from LG it says MI listner not responding and see below error message:

Communication error: The Client failed to send packet. The socket has been shut down. [MsgId: MERR-10343]
Two Way Communication Error: Function two_way_comm_post_message / two_way_comm_post_message_ex failed. [MsgId: MERR-60990]

Can so eone please help me out with this issue and how to resolve it?

Thanks,