...
These should no longer occur; JMeter now ignores all certificate errors such as expiry and incorrect hostname.
Recording HTTPS
The JMeter proxy can record HTTP requests, but it cannot record HTTPS, because the data is already encrypted by the time it reaches the JMeter proxy. If the proxy could decrypt it, it would not be very secure ...
So, what are the options for generating test plans using HTTPS?
...
Since JMeter 2.4, the JMeter proxy can record HTTPS requests like HTTP requests.
You must accept a special ssl certificat "Apache JMeter" when you record your session.
...