Upon loading a new world with the seed 521246738659102639, in Creative Mode, under the default world type with generate structures turned on and bonus chest off, a fatal exception was thrown upon world generation. The result was that the chunks immediately surrounding the spawn point did not exist.
Attempting to relate it to common graphical world hole glitches, I used F3 + A to reload the chunks. But the hole remained. The bug was not graphical, but the blocks literally did not exist. However, upon reloading the world, the issue disappeared.
I created this as a new ticket because it didn't seem to relate to all other concurrentModificationException tickets, for this one was caused by something completely different.
First picture is of the world hole, second is after reloading the world.
ADDITIONAL NOTES: Chunk loading in that world seemed to take twice the computing power and go half as quickly after this incident. It may just be in my head though.
[16:48:10] [Client thread/FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.util.ConcurrentModificationException
at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_25]
at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_25]
at w.a(SourceFile:45) [1.8.2-pre1.jar:?]
at bst.at(SourceFile:876) [1.8.2-pre1.jar:?]
at bst.a(SourceFile:321) [1.8.2-pre1.jar:?]
at net.minecraft.client.main.Main.main(SourceFile:124) [1.8.2-pre1.jar:?]
Caused by: java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextNode(HashMap.java:1429) ~[?:1.8.0_25]
at java.util.HashMap$KeyIterator.next(HashMap.java:1453) ~[?:1.8.0_25]
at ue.<init>(SourceFile:21) ~[1.8.2-pre1.jar:?]
at bfg.<init>(SourceFile:80) ~[1.8.2-pre1.jar:?]
at cel.c(SourceFile:50) ~[1.8.2-pre1.jar:?]
at cen.b(SourceFile:135) ~[1.8.2-pre1.jar:?]
at cee.a(SourceFile:890) ~[1.8.2-pre1.jar:?]
at jt.a(SourceFile:81) ~[1.8.2-pre1.jar:?]
at jt.a(SourceFile:10) ~[1.8.2-pre1.jar:?]
at ii.run(SourceFile:13) ~[1.8.2-pre1.jar:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_25]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_25]
at w.a(SourceFile:44) ~[1.8.2-pre1.jar:?]
... 3 moreLinked issues
is duplicated by 1
Attachments
Comments 5
Cannot reproduce (means the crash is not dependent on the seed).
Please attach the crash report from [minecraft/crash-reports/crash-<DATE>-client.txt|http://hopper.minecraft.net/help/finding-minecraft-data-folder].
Confirmed for
15w36d However I do not know how to reproduce. I experience also MC-10976. This happened in a superflat world with this settings:
Presets:
3;minecraft:bedrock,minecraft:grass;1;Seed:
-5699127479337880198
I also attached the world as "Affected world (15w36d).zip" (When you open it, you will not see the error anymore, but maybe somewhere in the level.dat file there is some important information)
[12:58:36] [Server thread/INFO]: Starting integrated minecraft server version 15w36d
[12:58:36] [Server thread/INFO]: Generating keypair
[12:58:37] [Server thread/INFO]: Preparing start region for level 0
[12:58:37] [Server thread/INFO]: Changing view distance to 12, from 10
[12:58:37] [Server thread/INFO]: Marcono1234[local:E:54dfd5a6] logged in with entity id 3330535 at (609.5, 2.0, -170.5)
[12:58:37] [Server thread/INFO]: Marcono1234 joined the game
[12:58:38] [Server thread/INFO]: Saving and pausing game...
[12:58:38] [Server thread/INFO]: Saving chunks for level 'Enderdragon Test'/Overworld
[12:58:38] [Server thread/INFO]: Saving chunks for level 'Enderdragon Test'/Nether
[12:58:38] [Server thread/INFO]: Saving chunks for level 'Enderdragon Test'/The End
[12:58:41] [Client thread/FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.util.ConcurrentModificationException
at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_25]
at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_25]
at g.a(SourceFile:46) [15w36d.jar:?]
at azo.as(SourceFile:921) [15w36d.jar:?]
at azo.a(SourceFile:378) [15w36d.jar:?]
at net.minecraft.client.main.Main.main(SourceFile:125) [15w36d.jar:?]
Caused by: java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextNode(HashMap.java:1429) ~[?:1.8.0_25]
at java.util.HashMap$KeyIterator.next(HashMap.java:1453) ~[?:1.8.0_25]
at nn.<init>(SourceFile:27) ~[15w36d.jar:?]
at aqr.<init>(SourceFile:82) ~[15w36d.jar:?]
at bhs.c(SourceFile:50) ~[15w36d.jar:?]
at bhu.b(SourceFile:160) ~[15w36d.jar:?]
at bhr.a(SourceFile:514) ~[15w36d.jar:?]
at gp.a(SourceFile:68) ~[15w36d.jar:?]
at gp.a(SourceFile:11) ~[15w36d.jar:?]
at fh$1.run(SourceFile:13) ~[15w36d.jar:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_25]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_25]
at g.a(SourceFile:45) ~[15w36d.jar:?]
... 3 more
[12:58:48] [Server thread/INFO]: Marcono1234 has just earned the achievement [Taking Inventory]
[12:58:48] [Client thread/INFO]: [CHAT] Marcono1234 has just earned the achievement [Taking Inventory]
I apologize for forgetting to switch to the default resource pack. In the moment, I forgot, and by the time I realized it was too late. :/