Bug #96656 Telnet to 8.0.16 shows version 8.0.11
Submitted: 26 Aug 2019 13:23 Modified: 26 Aug 2019 16:12
Reporter: Fredrik Stridfeldt Email Updates:
Status: Not a Bug Impact on me:
None 
Category:MySQL Server Severity:S3 (Non-critical)
Version:8.0.16 OS:Red Hat
Assigned to: CPU Architecture:x86
Tags: telnet, version

[26 Aug 2019 13:23] Fredrik Stridfeldt
Description:
[mysql@seliiudb00370 Mysql 8.0 tgf_poc_3306]$ hostname
seliiudb00370.seli.gic.ericsson.se
[mysql@seliiudb00370 Mysql 8.0 tgf_poc_3306]$ /u01/mysql/8.0/bin/mysqld --version
/u01/mysql/8.0/bin/mysqld  Ver 8.0.16 for Linux on x86_64 (Source distribution)

estfred@seroiudb00164[15:16][/home/estfred]$ telnet seliiudb00370.seli.gic.ericsson.se 3306
Trying 10.210.52.149...
Connected to seliiudb00370.seli.gic.ericsson.se.
Escape character is '^]'.
J
8.0.11U.Z1�!*("(.fQ     dUcaching_sha2_passwordConnection closed by foreign host.

How to repeat:
Install 8.0.16 and telnet to configured port from another host.
[26 Aug 2019 16:12] Shane Bester
I truly doubt this is a bug.  Can you kindly confirm which mysqld is listening on the tcp/ip port using tools like lsof, netstat, ps auxxx

You've probably got another 8.0.11 running there.   Try login using mysql client and run:  SELECT VERSION();
[26 Aug 2019 16:16] Shane Bester
Check output of:

netstat -p | grep -i mysqld
for pid in $(pidof mysqld) ; do echo "lsof for pid = ${pid}"; 
echo "========================"; echo; lsof -s -p${pid}; echo; echo; done

ps auxfww | grep -E 'mysqld'