"Out of Memory Error" causing headaches

I am getting an "out of memory error" causing me severe headaches. it brings the entire server down. I seems to happen about once every 24 hours of continuous run time. I get this error running MineOS+ in a RAMdisk. Both on a dedicated box with 3 gigs RAM, and in a virtual PC with 3 gigs dedicated out of 12 possible. I have removed all plugins and it takes much longer to happen, though still does.

Code:

2011-05-17 09:34:06 [SEVERE] java.lang.OutOfMemoryError
2011-05-17 09:34:06 [SEVERE] at java.util.zip.Deflater.init(Native Method)
2011-05-17 09:34:06 [SEVERE] at java.util.zip.Deflater.(Deflater.java:168)
2011-05-17 09:34:06 [SEVERE] at java.util.zip.Deflater.(Deflater.java:185)
2011-05-17 09:34:06 [SEVERE] at java.util.zip.DeflaterOutputStream.(DeflaterOutputStream.java:162)
2011-05-17 09:34:06 [SEVERE] at java.util.zip.DeflaterOutputStream.(DeflaterOutputStream.java:175)
2011-05-17 09:34:06 [SEVERE] at net.minecraft.server.RegionFile.b(SourceFile:242)
2011-05-17 09:34:06 [SEVERE] at net.minecraft.server.RegionFileCache.d(SourceFile:94)
2011-05-17 09:34:06 [SEVERE] at net.minecraft.server.ChunkRegionLoader.a(SourceFile:58)
2011-05-17 09:34:06 [SEVERE] at net.minecraft.server.ChunkProviderServer.saveChunk(ChunkProviderServer.java:160)
2011-05-17 09:34:06 [SEVERE] at net.minecraft.server.ChunkProviderServer.unloadChunks(ChunkProviderServer.java:225)
2011-05-17 09:34:06 [SEVERE] at net.minecraft.server.World.doTick(World.java:1450)
2011-05-17 09:34:06 [SEVERE] at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:363)
2011-05-17 09:34:06 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:287)
2011-05-17 09:34:06 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(SourceFile:394)
2011-05-17 09:34:06 [SEVERE] Unexpected exception
java.lang.OutOfMemoryError
at java.util.zip.Deflater.init(Native Method)
at java.util.zip.Deflater.(Deflater.java:168)
at java.util.zip.Deflater.(Deflater.java:185)
at java.util.zip.DeflaterOutputStream.(DeflaterOutputStream.java:162)
at java.util.zip.DeflaterOutputStream.(DeflaterOutputStream.java:175)
at net.minecraft.server.RegionFile.b(SourceFile:242)
at net.minecraft.server.RegionFileCache.d(SourceFile:94)
at net.minecraft.server.ChunkRegionLoader.a(SourceFile:58)
at net.minecraft.server.ChunkProviderServer.saveChunk(ChunkProviderServer.java:160)
at net.minecraft.server.ChunkProviderServer.unloadChunks(ChunkProviderServer.java:225)
at net.minecraft.server.World.doTick(World.java:1450)
at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:363)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:287)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:394)
2011-05-17 09:34:40 [INFO] Read timed out
2011-05-17 09:35:02 [INFO] Read timed out
2011-05-17 09:35:11 [INFO] Read timed out
2011-05-17 09:35:56 [INFO] Read timed out
2011-05-17 09:36:01 [INFO] Read timed out 

 

I know this may seem obvious - but what propt or command are you using to start the server? (it possible you could just be using the wrong syntax to designate the heap sizes)

edit: In case I don't make any sense, are you actually designating all 3 GB of ram to the server?

 

I am running on MineOS, which has a webui and uses a "start" button. The syntax they use, as I have found it in their code, is

Code:

 def execute(self, command, arg_string=None):
        if command == 'start':
            if self.mod == 'bukkit':
                return 'cd %s; screen %s -dmS mc-%s %s -server -Xms%iM -Xmx%iM -jar %s -p %i -s %i -c %s -w %s -P %s' % \
                       (self.cwd,
                        self.screen_config,
                        self.worldname,
                        os.path.join(environment.JAVA_PATH, 'java'),
                        self.memory,
                        self.memory,
                        os.path.join(environment.MC_PATH, self.server_jar),
                        self.port,
                        self.max_players,
                        os.path.join('server.properties'),
                        os.path.join('world'),
                        os.path.join('plugins'))

As for the ram, as I am running on a RAM disk, with the os having an overhead of about 200 megs, I am starting the server with the 32-bit max of 2.5 gigs. I have also ran it on 64-bit starting it with 2.7 gigs.

 

What is the output of your "java - version" command? Have you tried running the server manually - aka, not through the MineOS script?

 

When running on 64-bit, java output is

Code:

openjdk version "1.7.0-internal"

When running 32 bit, it was the latest stable java...

Ohh and I have not run it manually as I am not 100% sure how to do so?

 

To run it manually, open up a console (either SSH, or directly on the box) and type in:

java -Xincgc -Xmx1G -jar craftbukkit.jar nogui

Its as simple as that. Adjust the 1G as necessary. Also, you can stick with x64 Java - no reason to go to x86.

 

I will give it a shot this evening! Thank you very much.