I have the same problem on my server, no crashes, but the map is very laggy.
The error appear after an 1.8 world converted for 1.9: "Keeping entity Entity[...] that already exists with UUID [...]" and affect all mobs.
That problem is not from my host, it's very efficient and work perfectly on 1.8.
I've tried some test:
repeat /kill @e[type=!Player]
try to load my map in singleplayer
try the many 1.9 snapshots, and 1.9.1 pre-release 1,2,3
No test is really conclusive, the game is very unplayable, particularly the IA of mobs, breaking blocks, eating and redstone systems
Personally, I think it's similar with the invisible skeleton in snapshots.
[I post that I've write on the closed post MC-98027.]
Why you close this post, its better explain in this post than the other,?
And there are more people here
Yes i understand now,
i will test what snapshot can fix this, since 1.8.9, if it's possible of course, i will tell you if it work.
so it's surely the snapshot who fix that error, i will test that, thanks for info
Ok nice, with an converted 1.8 map? only with 1.9.1 pre-3?
After more test, the error persists, [but i think part of lags are missings, good things.]
[UPDATE] after a long test, no changes, lags are here yet.
@FVbico sorry i'm french, i don't understand your answer, are you saying you have no errors and no lags on your map?
I try to load my map in singleplayer but it's the same error.
Someone tested in a 1.9 snapshot?
I think it's similar with the invisible skeleton in snapshots
The 1.9.1 pre3 is available, someone can test this?
[Edit] 1.9.1 pre3 Tested, same error at first test,
@FVbico I test all pre-release myself
I just would like to know how your map reacts with pre-release.
I have the same problem on my server, no crashes but the map is very laggy, it's not my host.
The map was used perfectly with 1.8
I've try repeat /kill @e[type=!Player]
but it do nothing
I've also try the 1.9.1 pre1, but it make no change
[Edit] 1.9.1 pre2 no more change...
Hi, i investigate that issue (with a carpet mod script for more facilities, i originally play in vanilla an it's the same)
there are two cases of occurrence:
sometimes with a new villager who change master villager block
sometimes during night, villager (master) change randomly their block
Why they can take a block with a so long radius, when they can't acces to this block?