The arrow struck the shield with a impactful “thud! Steve peeked around the shield’s edge and saw the arrow was wrapped in a note!
Steve excitedly pulled it loose to see what it said…
Or you could open up your start window and in the search bar, search: Run 2. Then take your 1.9 jar and drag it into your (If it asks to merge, Select YES ) 5.
Next a window should pop up and then you should open up the Roaming folder and select . Then after merging close everything Reopen minecraft and now you can now try the 1.9 pre-release before it's officially out.
EDIT: This will only work if you have access to edit the server's file. To answer your question about automatically updating, this is not a thing.
Most servers will not support 1.9 because it's not available for Spigot, as said above. People will need to follow the step above to update their server for Spigot or Vanilla.
Usually, downloading the official Minecraft launcher again is enough to fix this.
If you're expecting an update but you don't see any message about it, make sure the update is out for your device.
Also, the name of the popup window is "Mojang native launcher updater".
I can temporarily solve this problem by turning off my Wi Fi, opening Minecraft, and quickly turning my Wi Fi back on, but the next time I reopen Minecraft, the same thing happens all over again.