Java Garbage Collection Leak[BUG]

[Phantum]

Describe the bug
Some sort of memory leak with the database

To Reproduce
not overly sure, seems to happen randomly.

Expected behavior
Not have a memory leak.

Screenshots and LOGs
https://pastebin.com/M02v74df

Server and plugins versions (please complete the following information):

• Server: spongeforge-1.12.2-2838-7.1.7-RC3854.jar
• Plugin Version: RankUpper-4.0.4-b20-Universal.jar
• Java Version: Jdk 8-jre

Additional context
Add any other context about the problem here.