Reference links: https://blog.csdn.net/learnframework/article/details/116861979
Android compile but the error Try jack - diagnose, SSL error when connecting to the jack server
My side do a summary, in view of the recent compilation android 8.1 on May 1, 2021 or so suddenly suddenly jack server has been an error, the network is baidu what modification of port, etc., could not solve, side according to jack command to export the report log print is as follows:

Jack $JACK_EXTRA_CURL_OPTIONS=- v - admin list server
* Trying 127.0.0.1...
* Connected to localhost (127.0.0.1) port 18077 (# 0)
* found 1 certificates in/home/test/. Jack - server/server. Pem
* found 521 certificates in/etc/SSL/certs
HTTP/1.1 * ALPN, offering
* gnutls_handshake () failed: The TLS connection was non - properly terminated.
* Closing connection 0
SSL error when connecting to the Jack server. Try 'Jack - diagnose'

What is obvious gnutls_handshake () failed: The TLS connection was non - properly terminated. The network links and authentication error, and port number a dime relationship are not