JMeter
Known Issues
SSL
Try starting JMeter as:
jmeter -Djsse.enableSNIExtension=false
If it helps you can make the change permanent by adding the next line to system.properties file (located in JMeter's "bin" folder)
jsse.enableSNIExtension=false
See Apache JMeter Properties Customization Guide for more information on different JMeter properties types and ways of setting and overriding them