javax.net.ssl.SSLException: Certificate doesn't match any of the subject alternative names

Question

I recently added LetsEncrypt certificates to my server and my java applet is having problems connecting using TLS.

My applet uses Apache HttpClient.

My web s

Answer 1

I don't know which version of the Apache HttpClient you were using but versions 4.4.1 and 4.5.1 had a bug where the SNI didn't work correctly. This was fixed in 4.5.3

https://issues.apache.org/jira/browse/HTTPCLIENT-1726