Fix JMeter SNI Issue
SNI is the acronym for Server Name Indication:
Server Name Indication (SNI) is an extension to the TLS computer networking protocol by which a client indicates which hostname it is attempting to connect to at the start of the handshaking process.
SNI extension may not work with legacy web-servers who doesn't support it. Fortunately, SNI extension can be disabled in JMeter. JMeter is a Java program. Java has enabled SNI support in Java 7. The issue is typically displayed in JMeter as an SSLHandshakeException, with message like handshake_failure or handshake alert: unrecognized_name.
JMeter uses HTTPClient to perform Http Requests. HttpClient uses the Java JDK SSL support mechanism. Therefore, disabling SNI support in the Java Virtual Machine will disable SNI in HttpClient.