following the
Bug MC-63590 (marked as resolved)
Bug MC-63671 (marked as resolved)
Bug MC-73400 (marked as resolved)

watchdog shutdown my server at a max of 600 000

i got a modded snapshot 15w39c and the bug seem to begin when players teleport to another dimension
(for switch the dimension i use mg.*(player,int,position)
//###############
java.lang.Error
at java.util.ArrayList.indexOf(ArrayList.java:298)
at java.util.ArrayList.contains(ArrayList.java:281)
at java.util.ArrayList.batchRemove(ArrayList.java:700)
at java.util.ArrayList.removeAll(ArrayList.java:671)
at agv.k(SourceFile:1389)
at lk.k(SourceFile:538)
//###############
i placed a system print to watch the size of the pending removal tileentitylist and it seems to grow when a player switch dimension, the removal pending list of the world he left continue to grow like a memory flow
when teleport back to the left world, removal list become empty

if player dont go back and leave the game, when someone will join the server after an idle of zero connected, it crash during the removeall()

i have this problem since you added a "position" param to the method, maybe the use of this method changed or maybe i discovered a bug

maybe it got something to do with the spam in console about duplicate uuid of the entities ?
thanx for the attention you paid to this