Server crash, no clue why

[zepherium]

im getting a server crash a few minutes after i bring it up, im running it on my computer through hamachi and i get this on the server page

[SEVERE] Encountered an unexpected exception ReportedException
net.minecraft.util.ReportedException: Ticking entity
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:660)
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:275)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:573)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:470)
at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)
Caused by: java.lang.OutOfMemoryError: Java heap space
at net.minecraft.network.packet.Packet51MapChunk.func_73594_a(Packet51MapChunk.java:276)
at net.minecraft.network.packet.Packet56MapChunks.<init>(Packet56MapChunks.java:55)
at net.minecraft.entity.player.EntityPlayerMP.func_70071_h_(EntityPlayerMP.java:288)
at net.minecraft.world.World.func_72866_a(World.java:2342)
at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:717)
at net.minecraft.world.World.func_72870_g(World.java:2304)
at net.minecraft.world.World.func_72939_s(World.java:2150)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:546)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:654)
... 4 more

 

[lavarthan]

Caused by: java.lang.OutOfMemoryError: Java heap space

Make sure the server has 64bit version of Java if the OS is 64bit, remove all other versions. Then add these arguments if it has 4GB of RAM or more.