Are you truly using a six years old technology stack?
Are you already applying for a Java laggard club membership?
If you are still using Java 8 you are using technologies released in Spring 2014. You are missing all the improvements in the garbage collector, runtime engine and various API.
Java 11 LTS was released in September 2018. The current LTS release is one year old. You had one year to migrate to this long term solution version.
It is time to modernize the fundament of your application and invest a small amount of effort in it. The payback is really good.
