Bukkit

So I've done the standard things in order to generate my world border so it will show up on dynmap. I first did

/wb map set 1000 1000

"map" is my world name.

Then I did

/wb fill

and

/wb fill confirm

After 2 hours, I came back to dynmap to do /dynmap fullrender, and after waiting 30 minutes, nothing was generated.

I think its because of this error

4.07 21:02:20 [Server] INFO java.lang.NullPointerException
24.07 21:02:20 [Server] INFO at net.minecraft.server.v1_7_R4.NBTTagCompound.a(SourceFile:329) ~[spigot-1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
24.07 21:02:20 [Server] INFO at net.minecraft.server.v1_7_R4.NBTTagCompound.load(SourceFile:41) ~[spigot-1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
24.07 21:02:20 [Server] INFO at net.minecraft.server.v1_7_R4.NBTTagCompound.a(SourceFile:329) ~[spigot-1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
24.07 21:02:20 [Server] INFO at net.minecraft.server.v1_7_R4.NBTTagCompound.load(SourceFile:41) ~[spigot-1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
24.07 21:02:20 [Server] INFO at net.minecraft.server.v1_7_R4.NBTTagCompound.a(SourceFile:329) ~[spigot-1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
24.07 21:02:20 [Server] INFO at net.minecraft.server.v1_7_R4.NBTTagCompound.load(SourceFile:41) ~[spigot-1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
24.07 21:02:20 [Server] INFO at net.minecraft.server.v1_7_R4.NBTCompressedStreamTools.a(NBTCompressedStreamTools.java:119) ~[spigot-1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
24.07 21:02:20 [Server] INFO at net.minecraft.server.v1_7_R4.NBTCompressedStreamTools.a(NBTCompressedStreamTools.java:84) ~[spigot-1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
24.07 21:02:20 [Server] INFO at net.minecraft.server.v1_7_R4.NBTCompressedStreamTools.a(NBTCompressedStreamTools.java:79) ~[spigot-1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
24.07 21:02:20 [Server] INFO at net.minecraft.server.v1_7_R4.ChunkRegionLoader.loadChunk(ChunkRegionLoader.java:82) ~[spigot-1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
24.07 21:02:20 [Server] INFO at net.minecraft.server.v1_7_R4.ChunkRegionLoader.a(ChunkRegionLoader.java:48) ~[spigot-1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
24.07 21:02:20 [Server] INFO at net.minecraft.server.v1_7_R4.ChunkProviderServer.loadChunk(ChunkProviderServer.java:219) [spigot-1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
24.07 21:02:20 [Server] INFO at org.bukkit.craftbukkit.v1_7_R4.CraftWorld.loadChunk(CraftWorld.java:256) [spigot-1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
24.07 21:02:20 [Server] INFO at org.dynmap.bukkit.NewMapChunkCache.loadChunks(NewMapChunkCache.java:847) [dynmap-2.1-alpha-1.jar:?]
24.07 21:02:20 [Server] INFO at org.dynmap.bukkit.DynmapPlugin$BukkitServer$6.call(DynmapPlugin.java:452) [dynmap-2.1-alpha-1.jar:?]
24.07 21:02:20 [Server] INFO at org.dynmap.bukkit.DynmapPlugin$BukkitServer$6.call(DynmapPlugin.java:439) [dynmap-2.1-alpha-1.jar:?]
24.07 21:02:20 [Server] INFO at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftFuture.run(CraftFuture.java:89) [spigot-1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
24.07 21:02:20 [Server] INFO at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [spigot-1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
24.07 21:02:20 [Server] INFO at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:641) [spigot-1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
24.07 21:02:20 [Server] INFO at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:289) [spigot-1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
24.07 21:02:20 [Server] INFO at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:584) [spigot-1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
24.07 21:02:20 [Server] INFO at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:490) [spigot-1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
24.07 21:02:20 [Server] INFO at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [spigot-1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
24.07 21:02:20 [Server] ERROR Couldn't load chunk