Minecraft Forums

Got these within a few minutes of each other after updating from 12w39a to 12w39b.

---- Minecraft Crash Report ----
// Why did you do that?

Time: 9/30/12 8:03 AM
Description: Exception in server tick loop

java.lang.RuntimeException: Already decorating!!
at wr.a(SourceFile:21)
at wn.a(SourceFile:217)
at yq.a(SourceFile:460)
at gx.a(SourceFile:152)
at xo.a(SourceFile:650)
at gx.c(SourceFile:90)
at gx.d(SourceFile:100)
at vs.e(SourceFile:258)
at vs.b(SourceFile:210)
at vs.a(SourceFile:199)
at vs.a(SourceFile:2503)
at vs.a(SourceFile:1749)
at vs.a(SourceFile:1851)
at vs.a(SourceFile:1905)
at vs.b(SourceFile:1765)
at vs.w(SourceFile:1716)
at vs.x(SourceFile:1729)
at xo.m(SourceFile:820)
at gx.a(SourceFile:151)
at xo.a(SourceFile:653)
at gx.c(SourceFile:90)
at gw.<init>(SourceFile:26)
at gv.a(SourceFile:171)
at gv.a(SourceFile:202)
at ey.a(SourceFile:104)
at ey.c(SourceFile:139)
at ey.a(SourceFile:81)
at bam.b(SourceFile:72)
at net.minecraft.server.MinecraftServer.r(SourceFile:475)
at net.minecraft.server.MinecraftServer.q(SourceFile:402)
at baj.q(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:336)
at et.run(SourceFile:562)

Relevant Details:
- Minecraft Version: 12w39b
- Operating System: Windows XP (x86) version 5.1
- Java Version: 1.7.0_07, Oracle Corporation
- Java VM Version: Java HotSpot™ Client VM (mixed mode), Oracle Corporation
- Memory: 323636280 bytes (308 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
- JVM Flags: 2 total; -Xms512m -Xmx1024m
- Is Modded: Probably not
- Profiler Position: N/A (disabled)
- Player Count: 1 / 8; [hb['Omega_Tier'/4579, l='Yami no Sekai', x=146.83, y=63.00, z=-1.02]]
- World Yami no Sekai Entities: 0 total; []
- World Yami no Sekai Players: 0 total; []
- World Yami no Sekai Chunk Stats: ServerChunkCache: 0 Drop: 0
- Type: Integrated Server


-----------

---- Minecraft Crash Report ----
// I just don't know what went wrong

Time: 9/30/12 8:10 AM
Description: Exception in server tick loop

java.lang.RuntimeException: Already decorating!!
at wr.a(SourceFile:21)
at wn.a(SourceFile:217)
at wz.a(SourceFile:48)
at yq.a(SourceFile:460)
at gx.a(SourceFile:152)
at xo.a(SourceFile:659)
at gx.c(SourceFile:90)
at gw.<init>(SourceFile:26)
at gv.a(SourceFile:171)
at gv.a(SourceFile:202)
at ey.a(SourceFile:104)
at ey.c(SourceFile:139)
at ey.a(SourceFile:81)
at bam.b(SourceFile:72)
at net.minecraft.server.MinecraftServer.r(SourceFile:475)
at net.minecraft.server.MinecraftServer.q(SourceFile:402)
at baj.q(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:336)
at et.run(SourceFile:562)

Relevant Details:
- Minecraft Version: 12w39b
- Operating System: Windows XP (x86) version 5.1
- Java Version: 1.7.0_07, Oracle Corporation
- Java VM Version: Java HotSpot™ Client VM (mixed mode), Oracle Corporation
- Memory: 273452576 bytes (260 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
- JVM Flags: 2 total; -Xms512m -Xmx1024m
- Is Modded: Probably not
- Profiler Position: N/A (disabled)
- Player Count: 1 / 8; [hb['Omega_Tier'/31506, l='Yami no Sekai', x=464.01, y=68.00, z=-128.17]]
- World Yami no Sekai Entities: 0 total; []
- World Yami no Sekai Players: 0 total; []
- World Yami no Sekai Chunk Stats: ServerChunkCache: 8 Drop: 0
- Type: Integrated Server

I have also received a similar crash report.

Steps I had done:

1. Create a new Creative world in Minecraft 1.3.2, with the following
• Cheats ON
• Seed: 0
• Bonus Chests: OFF
• Default world.
• Generate Structures: ON
2. Change the "minecraft.jar" to the latest snapshot, 12w39b.
3. Go back into the same Creative world that was generated by 1.3.2.
4. Set "/gamerule doFireTick true".
5. Start aflaming trees.
6. Easily obtain this crash.

Crash report:

	 Minecraft has crashed!	
	 ----------------------	
Minecraft has stopped running because it encountered a problem; Exception in server tick loop
This error has been saved to C:\Users\Thompson\AppData\Roaming\.minecraft\crash-reports\crash-2012-10-01_16.39.55-server.txt for your convenience. Please include a copy of this file if you report this crash to anyone.

--- BEGIN ERROR REPORT ad20b573 --------
Generated 10/1/12 4:40 PM
- Minecraft Version: 12w39b
- Operating System: Windows 7 (amd64) version 6.1
- Java Version: 1.7.0_07, Oracle Corporation
- Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
- Memory: 455342352 bytes (434 MB) / 598081536 bytes (570 MB) up to 954466304 bytes (910 MB)
- JVM Flags: 2 total; -Xms512m -Xmx1024m
- Is Modded: Probably not
- Profiler Position: N/A (disabled)
- Player Count: 0 / 8; []
- World server Entities: 0 total; []
- World server Players: 0 total; []
- World server Chunk Stats: ServerChunkCache: 0 Drop: 0
- Type: Integrated Server
java.lang.RuntimeException: Already decorating!!
at wr.a(SourceFile:21)
at wn.a(SourceFile:217)
at wz.a(SourceFile:48)
at yq.a(SourceFile:460)
at gx.a(SourceFile:152)
at xo.a(SourceFile:650)
at gx.c(SourceFile:90)
at gx.d(SourceFile:100)
at vs.e(SourceFile:258)
at vs.b(SourceFile:210)
at vs.a(SourceFile:199)
at vs.a(SourceFile:2503)
at vs.a(SourceFile:1749)
at vs.a(SourceFile:1851)
at vs.a(SourceFile:1905)
at vs.b(SourceFile:1765)
at vs.w(SourceFile:1716)
at vs.d(SourceFile:1928)
at vs.b(SourceFile:1521)
at gy.b(SourceFile:95)
at net.minecraft.server.MinecraftServer.r(SourceFile:458)
at net.minecraft.server.MinecraftServer.q(SourceFile:402)
at baj.q(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:336)
at et.run(SourceFile:562)
--- END ERROR REPORT 5f3c2e1c ----------

EDIT:

I think I know the cause.

If the world has the game rule "doFireTick" enabled, after 20 minutes of nonstop burning trees in a dense forest, the game will start to become unresponsive. I eventually had to use Task Manager on Windows 7 to force stop the Java process.