Server crashes with FML

[jaktheripper6]

Whenever I load a vanilla mincraft_server.jar I run it normally, then add forge 3.3.7. But the server starts, it will load regions 1, -1, and 0. When it hits zero it will load somewhere around 85-90% and give the error message:

java.lang.OutOfMemoryError: Java heap space

                      at ix. <init>(SourceFile:22)

                      at my. <init>(Chunk.java:135)

                      at aaq.b(SourceFile:231)

                      at mp.c(ChunkProviderServer.java:111)

                      at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:329)

                      at net.minecraft.server.MinecraftServer.s(MinecraftServer.java:246)

                      at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:412)

                      at dn.run(SourceFile:492)

 

It would be great if I could get some help and input on what it is I am doing wrong. I use no other mods on my server when I load forge, it seems to reject it on its own.

[OvermindDL1]

Means you ran out of memory.  How much memory do you have allocated to Java for Minecraft?  Is this a fresh/new world?