Hopper: java.lang.OutOfMemoryError: Exception in server tick loop

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-465317/

Crash:

java.lang.OutOfMemoryError: Exception in server tick loop
java.lang.OutOfMemoryError: Exception in server tick loop

The following is the first clean report made public about this crash:

---- Minecraft Crash Report ----
// I'm sorry, Dave.

Time: 25.10.13 20:17
Description: Exception in server tick loop

java.lang.OutOfMemoryError: Exception in server tick loop
	at java.util.zip.Deflater.init(Native Method)
	at java.util.zip.Deflater.<init>(Unknown Source)
	at java.util.zip.Deflater.<init>(Unknown Source)
	at go.<init>(SourceFile:39)
	at mh.b(SourceFile:54)
	at mg.d(SourceFile:350)
	at ld.d(SourceFile:215)
	at mx.a(SourceFile:280)
	at ir.a(SourceFile:137)
	at it.a(SourceFile:20)
	at ef.a(SourceFile:164)
	at ms.c(SourceFile:134)
	at net.minecraft.server.MinecraftServer.u(SourceFile:529)
	at net.minecraft.server.MinecraftServer.t(SourceFile:441)
	at bsk.t(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:358)
	at ky.run(SourceFile:617)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
	Minecraft Version: 1.7.2
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_45, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 49130856 bytes (46 MB) / 398639104 bytes (380 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 1 total; -Xmx512M
	AABB Pool Size: 3353 (187768 bytes; 0 MB) allocated, 2465 (138040 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 102
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 7992 (447552 bytes; 0 MB) allocated, 1677 (93912 bytes; 0 MB) used
	Player Count: 3 / 8; [mm['stealthsyndica'/164296, l='Новый мир', x=736,40, y=67,17, z=751,71], mm['IIxGriimZz'/161124, l='Новый мир', x=795,82, y=64,79, z=759,62], mm['heavyjewlz'/164472, l='Новый мир', x=794,94, y=61,00, z=757,56]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-465317/21403379/