Dear Monjang, I have been having problems with this game and I cannot fix them, can you help me

Help!!

AL lib: (EE) alc_cleanup: 1 device not closed
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release

*What I expected to happen was it work but it didnt
I am really frustruared and I want to fix this thing fast.

dear Monjang, for the last micraft update 1.9, I had been playing for 1 minute on a world or a server and its loading until it appears this picture down below, all the time, I cannot play minecraft calmly because it always happens this, I dont know whta to do, can you help me.