Confluence OnPrem: Exceeds max allowed packet size for SQL. How do I fix this?
If you're having issues getting the Lucidchart Standalone for Confluence plugin working due to this error please follow these steps to fix the issue.
This is a known issue with Confluence. More information can be found here.
Go to the server where your Confluence instance is installed.
Open a shell and type the following command:
shell> mysqld --max_allowed_packet=128M
Restart mysql.
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