Need Help with Crashes

[Splat]

The server seems to crash about every 24 hours and I have no idea what this code tells me, below is the error message
that I get and some help would be great. Thanks!
[SEVERE] Encountered an unexpected exception t
20:17:51 t: Ticking tile entity
20:17:51 at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:686)
20:17:51 at ho.r(DedicatedServer.java:269)
20:17:51 at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:599)
20:17:51 at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497)
20:17:51 at fy.run(SourceFile:849)
20:17:51 Caused by: java.lang.OutOfMemoryError: Java heap space
20:17:51 at java.util.HashMap.newKeyIterator(Unknown Source)
20:17:51 at java.util.HashMap$KeySet.iterator(Unknown Source)
20:17:51 at bq.b(SourceFile:254)
20:17:51 at buildcraft.core.blueprints.BptSlot.clone(BptSlot.java:67)
20:17:51 at buildcraft.core.blueprints.BptBuilderBlueprint.<init>(BptBuilderBlueprint.java:70)
20:17:51 at buildcraft.factory.TileQuarry.initializeBluePrintBuilder(TileQuarry.java:620)
20:17:51 at buildcraft.factory.TileQuarry.createUtilsIfNeeded(TileQuarry.java:92)
20:17:51 at buildcraft.factory.TileQuarry.initialize(TileQuarry.java:648)
20:17:51 at buildcraft.core.TileBuildCraft.g(TileBuildCraft.java:55)
20:17:51 at buildcraft.factory.TileQuarry.g(TileQuarry.java:148)
20:17:51 at yc.h(World.java:2153)
20:17:51 at in.h(WorldServer.java:516)
20:17:51 at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:680)
20:17:51 ... 4 more
20:17:53 [SEVERE] This crash report has been saved to: /home/minecraft/./crash-reports/crash-2013-02-02_20.17.53-server.txt

 

[Velotican]

Are you using a Builder? They're notoriously buggy and crash-prone, so if you are, remove them. Recent versions of Buildcraft have actually disabled them entirely.

 

[Splat]

I'm not sure. From the looks of that error message, it seems to say Builder a few times. Someone on the server might be using one, is there any way i could find the coordinates from that error message?