[MC-139758] Stopping the server doesn't work

Hi. I have a VPS where i play all the minecraft versions and this is the first snapshot dont wont to stop, when i type stop in the console. Thank you.

From ~~MC-142040~~:

The bug

Server won't close with enabled GS4 listener on stop command.
What I expected to happen was...:
Server stops and exit after "stop" command on console
What actually happened was...:
Server hangs and won't exit after:

[19:41:33] [Server thread/INFO]: Saving chunks for level 'world'/minecraft:overworld
[19:41:33] [Server thread/INFO]: ThreadedAnvilChunkStorage (world): All chunks are saved
[19:41:33] [Server thread/INFO]: Saving chunks for level 'world'/minecraft:the_end
[19:41:33] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM1): All chunks are saved
[19:41:33] [Server thread/INFO]: Saving chunks for level 'world'/minecraft:the_nether
[19:41:33] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM-1): All chunks are saved

How to reproduce

Enable query port in server.properties.
```
enable-query=true
```

Start server

[19:46:58] [Server thread/INFO]: Done (8.822s)! For help, type "help"
[19:46:58] [Server thread/INFO]: Starting GS4 status listener
[19:46:59] [Query Listener #1/INFO]: Query running on 0.0.0.0:25565

Enter stop command

[19:47:06] [Server thread/INFO]: Stopping the server
[19:47:06] [Server thread/INFO]: Stopping server
[19:47:06] [Server thread/INFO]: Saving players
[19:47:06] [Server thread/INFO]: Saving worlds
[19:47:06] [Server thread/INFO]: Saving chunks for level 'world'/minecraft:overworld
[19:47:07] [Server thread/INFO]: ThreadedAnvilChunkStorage (world): All chunks are saved
[19:47:07] [Server thread/INFO]: Saving chunks for level 'world'/minecraft:the_nether
[19:47:07] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM-1): All chunks are saved
[19:47:07] [Server thread/INFO]: Saving chunks for level 'world'/minecraft:the_end
[19:47:07] [Server thread/INFO]: ThreadedAnvilChunkStorage (DIM1): All chunks are saved

→ Server hangs and won't exit (java proccess is still alive).