---- Minecraft Crash Report ---- // Don't do that.   Time: 3/23/15 10:06 AM Description: Exception in server tick loop   java.lang.OutOfMemoryError: Java heap space         at net.minecraft.world.chunk.Chunk.(Chunk.java:71)         at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75823_a(AnvilChunkLoader.java:411)         at net.minecraft.world.chunk.storage.AnvilChunkLoader.checkedReadChunkFromNBT__Async(AnvilChunkLoader.java:154)         at net.minecraft.world.chunk.storage.AnvilChunkLoader.loadChunk__Async(AnvilChunkLoader.java:124)         at net.minecraftforge.common.chunkio.ChunkIOProvider.callStage1(ChunkIOProvider.java:20)         at net.minecraftforge.common.chunkio.ChunkIOProvider.callStage1(ChunkIOProvider.java:12)         at net.minecraftforge.common.util.AsynchronousExecutor.skipQueue(AsynchronousExecutor.java:343)         at net.minecraftforge.common.util.AsynchronousExecutor.getSkipQueue(AsynchronousExecutor.java:302)         at net.minecraftforge.common.chunkio.ChunkIOExecutor.syncChunkLoad(ChunkIOExecutor.java:12)         at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:126)         at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:101)         at net.minecraft.server.MinecraftServer.func_71222_d(MinecraftServer.java:265)         at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:235)         at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:258)         at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:387)         at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)     A detailed walkthrough of the error, its code path and all known details is as follows: ---------------------------------------------------------------------------------------   -- System Details -- Details:         Minecraft Version: 1.7.10         Operating System: Windows 8.1 (x86) version 6.3         Java Version: 1.8.0_40, Oracle Corporation         Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation         Memory: 62216 bytes (0 MB) / 259522560 bytes (247 MB) up to 259522560 bytes (247 MB)         JVM Flags: 0 total;         AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used         IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94         FML: ~~ERROR~~ OutOfMemoryError: Java heap space         AE2 Version: beta rv2-beta-8 for Forge 10.13.2.1230         Mantle Environment: Environment healthy.         TConstruct Environment: Environment healthy.         AE2 Integration: IC2:OFF, RotaryCraft:OFF, RC:OFF, BC:OFF, MJ6:ON, MJ5:ON, RF:ON, RFItem:ON, MFR:ON, DSU:ON, FZ:OFF, FMP:ON, RB:OFF, CLApi:OFF, Waila:ON, Mekanism:OFF, ImmibisMicroblocks:OFF, BetterStorage:ON         Profiler Position: N/A (disabled)         Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used         Player Count: 0 / 20; []         Is Modded: Definitely; Server brand changed to 'fml,forge'         Type: Dedicated Server (map_server.txt)