uzon

The dragon had spawned naturally when I enter to the end.

The below is the game output when I made the movie(reproduce 006).
(Bold text means my comment)

[20:12:59] [Server thread/INFO]: Starting integrated minecraft server version 15w46a
[20:12:59] [Server thread/INFO]: Generating keypair
[20:13:00] [Server thread/INFO]: Preparing start region for level 0
[20:13:01] [Server thread/INFO]: Preparing spawn area: 12%
[20:13:02] [Server thread/INFO]: Preparing spawn area: 90%
[20:13:02] [Server thread/INFO]: Changing view distance to 8, from 10
[20:13:02] [Server thread/INFO]: uzon[local:E:a6d95aa0] logged in with entity id 224 at (-757.7640932262516, 31.0, 903.4564732333369)
[20:13:02] [Server thread/INFO]: uzon joined the game
[20:13:04] [Server thread/INFO]: Saving and pausing game...
[20:13:04] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/Overworld
[20:13:04] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/Nether
[20:13:04] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/The End
[20:13:04] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2045ms behind, skipping 40 tick(s)
[20:13:52] [Server thread/WARN]: uzon moved wrongly! ( 0:00:50 endering to the end https://youtu.be/Dw0EP9jcexk?t=47s )
[20:13:54] [Server thread/INFO]: Scanning for legacy world dragon fight...
[20:13:55] [Server thread/INFO]: Found that the dragon has not yet been killed in this world.
[20:13:56] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 4731ms behind, skipping 94 tick(s)
[20:22:24] [Server thread/WARN]: uzon moved wrongly! ( 0:09:42 https://youtu.be/Dw0EP9jcexk?t=9m36s )
([21:12:09] The dragon had gritched but no log output. In movie, 0:59:07 https://youtu.be/Dw0EP9jcexk?t=58m52s )
[21:20:36] [Server thread/INFO]: [uzon: Block placed] ( 1:07:34 https://youtu.be/Dw0EP9jcexk?t=1h7m12s )
[21:20:36] [Client thread/INFO]: [CHAT] Block placed
[21:22:33] [Server thread/INFO]: Saving and pausing game... ( 1:09:31 re-entering to the world https://youtu.be/Dw0EP9jcexk?t=1h9m21s )
[21:22:33] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/Overworld
[21:22:33] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/Nether
[21:22:33] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/The End
[21:22:34] [Server thread/INFO]: Stopping server
[21:22:34] [Server thread/INFO]: Saving players
[21:22:34] [Server thread/INFO]: Saving worlds
[21:22:34] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/Overworld
[21:22:34] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/Nether
[21:22:34] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/The End
[21:22:36] [Client thread/ERROR]: Realms module missing
[21:22:41] [Server thread/INFO]: Starting integrated minecraft server version 15w46a
[21:22:41] [Server thread/INFO]: Generating keypair
[21:22:41] [Server thread/INFO]: Preparing start region for level 0
[21:22:42] [Server thread/INFO]: Preparing spawn area: 72%
[21:22:42] [Server thread/INFO]: Changing view distance to 8, from 10
[21:22:43] [Server thread/INFO]: uzon[local:E:98065991] logged in with entity id 9462 at (13.579369518201673, 64.0, 0.8856402765095311)
[21:22:43] [Server thread/INFO]: uzon joined the game
[21:22:44] [Server thread/INFO]: Saving and pausing game...
[21:22:44] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/Overworld
[21:22:44] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/Nether
[21:22:44] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/The End
[21:23:39] [Server thread/INFO]: Saving and pausing game...
[21:23:39] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/Overworld
[21:23:39] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/Nether
[21:23:39] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/The End
[21:23:54] [Server thread/INFO]: Saving and pausing game...
[21:23:54] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/Overworld
[21:23:54] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/Nether
[21:23:54] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/The End
[21:40:39] [Server thread/INFO]: Stopping server
[21:40:39] [Server thread/INFO]: Saving players
[21:40:39] [Server thread/INFO]: Saving worlds
[21:40:39] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/Overworld
[21:40:39] [Client thread/ERROR]: Realms module missing
[21:40:39] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/Nether
[21:40:39] [Server thread/INFO]: Saving chunks for level 'ReproduceTheIssue'/The End
[21:40:41] [Client thread/INFO]: Stopping!

Well, I have to say, I'm sorry I don't have enough time for research this issue and couldn't get certain steps for reproduce.

This issue is really hard to reproduce.

The movie below is I had ever reproduced in 15w46a.
https://youtu.be/Dw0EP9jcexk

Now, this issue takes very long time to reproduce.
And I think this issue can be solved now.

Because maybe, my computer hardware is something wrong.

Added reproducing steps.
Added youtube links to reproduce 004 and 005.
Added a image of reproduce 005.

Sorry for make the dragon as like this.

I reduced my movie file size.
And fixed the issue firefox can't play reproduce 002 and 003.

Reproduced 2 more times.
But still don't get the exact steps.

What I tried for reproduce is as like..

• Broke all ender crystals for make more chance of her's breath attacks.

• Made her's breath attack 1 breath -> 0 breath(stay on the portal only) -> 0 breath -> 3 breathes -> 4 breathes.
  ..Or 4 breathes -> 3 breathes -> 4 breathes.

• Tried to shoot her as much as possible at the exact tyming of she is going on the end portal.

• Repeated go and away while she is on the end portal,
  Be close to her before she starts breath attack(it looks like taking few delay for the player) and away from her after the breath has started.

• Be extremely close to her at the 4th breath of a breath attack.

There was a end portal at the gap of the hill.

(The world seed is 4647618748637036896.)

While she is on the end portal,
there was some Endermen trying to attack the EnderDragon.

I guess, entities and/or dragon's breath counts and/or the surface of the end may cause the EnderDragon stop.

I know it is supporsed to happen.

I'm trying to find the way how to reproduce it.

Confirmed in 15w32b.