Error connecting to database Communications link failure The last packet successfully received from

[895367830]

log:

Tue Nov 30 19:52:04 CST 2021 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.

[Nic Brough -Adaptavist-]

Which one of these questions are you stuck on?

You've just given us an error message about the connection, and a snippet of log that is a warning about something else.

Could you explain more please?