When ever I use 1.8.9 or 1.8.0 ( haven't tried all 1.8 versions yet ) I find that my allocated space goes up very high, and I get these fatals, which I think causes it.

I have also tried 1.8.9 optifine.

( both images are I believe the same just taken on different occasions )

( please ignore that I said it was minecraft 17w50a )

Need help - just in case anyone knows whats going on, ofc I'll do it where its mean't to be reported if I have to.