This is my error message I got for many threads/requests in JMeter 2.11, if I'm sending 100 Threads/requests in 10s to a webserver which is configured with HAProxy 1.6.4. This server is redirecting the requests with simple round robin to 2 web-servers.
Response code: Non HTTP response code: javax.net.ssl.SSLHandshakeException
Response message: Non HTTP response message: Remote host closed connection during handshake
The load balancing server is staying "cool" (enough CPU, RAM).
If I'm sending the request direct to one of the webservers, it is working without errors. So I guess the error is causing by HAProxy...
I did't find a limit for HAProxy max open (SSL) connections or something like that...