Summary

Documentation Connecting Jira applications to MySQL 5.6 for Jira 8.0 recommends the creation of the database with the following parameters:

CREATE DATABASE jiradb CHARACTER SET utf8mb4 COLLATE utf8mb4_bin;

However, at the bottom of the same documentation it also says:

In this version of MySQL, 4-byte characters (e.g. emojis) aren't supported and will be displayed as question marks . They're supported in MySQL 5.7.

This causes confusion to customers and might lead to errors if the customer follows the procedures in the article.