What causes a "Java Hotspot 64-Bit Server VM Warning"?

I get this warning:

Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release

What does it mean?


Solution 1:

It means Minecraft is using a feature that is planned to be removed from future versions of Java.

It's not a problem now, and when it becomes a problem it will be Mojang's problem or 3rd-party launcher programmers' problem, not yours.