Performance testing - 200 Concurrent Users Test in Jmeter is failing with 8 Machines

I have tried running a test with 150 users & 6 machines in jmeter and it ran fine with no errors. But when i increased the number of users & number of machines to 200 users and 8 machines respectively, it started throwing "java.net.socketexception: connection reset" error

Previously i was facing this error when i tried running for 150 users with 4 machines. But, after increasing the machines by 2, the 150 user test was successful. Need help in this.

I tried accessing the application manually during the execution and i was able to access the application normally.