Java 8 Minecraft Error? Incremental CMS / ThreadUtilities / doesNotRecognizeSelector

Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release 2017-04-26 19:58:32.392 java[228:1a03] NSInvocation: warning: object 0x11729d440 of class 'ThreadUtilities' does not implement methodSignatureForSelector: -- trouble ahead 2017-04-26 19:58:32.451 java[228:1a03] NSInvocation: warning: object 0x11729d440 of class 'ThreadUtilities' does not implement doesNotRecognizeSelector: -- abort

What is this and how can I solve this?

EDIT: game doesn't run, log in comments.