Server Crashing - Help me find the problem?

I've been hosting a server for a few days and it randomly crashes (I'm not sure why, hence the thread). Here is the server log:

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[WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2011-07-12 00:45:58 [INFO] §9[PLAYER_COMMAND] EugeneDrAwkward: /give eugenedrawkward 54 1
2011-07-12 00:46:00 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2011-07-12 00:46:11 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2011-07-12 00:46:12 [INFO] <§7j1number1§f> oh cool, teleporter
2011-07-12 00:46:14 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2011-07-12 00:46:16 [INFO] §9[PLAYER_COMMAND] EugeneDrAwkward: /give eugenedrawkward 2 1
2011-07-12 00:46:18 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2011-07-12 00:46:22 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2011-07-12 00:46:26 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2011-07-12 00:46:30 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2011-07-12 00:46:33 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2011-07-12 00:46:36 [INFO] §9[PLAYER_COMMAND] birdhouses: /give birdhouses chest 100
2011-07-12 00:46:36 [INFO] <§7lapistola14§f> éhome
2011-07-12 00:46:36 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2011-07-12 00:46:39 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2011-07-12 00:46:42 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
2011-07-12 00:46:44 [INFO] §9[PLAYER_COMMAND] lapistola14: /home
2011-07-12 00:46:49 [SEVERE] java.lang.OutOfMemoryError: Java heap space
2011-07-12 00:47:40 [INFO] Stopping server
2011-07-12 00:47:47 [INFO] Wieze version 0.2 is disabled!
2011-07-12 00:47:50 [SEVERE] Exception in thread "Connectio
2011-07-12 00:47:59 [INFO] [CommandAlert] disabled
2011-07-12 00:48:02 [SEVERE] n #208 read thread"
2011-07-12 00:48:09 [INFO] [DeathCounter v0.1.3] DeathCounter disabled
2011-07-12 00:48:10 [SEVERE] Exception in thread "Listen thread"
2011-07-12 00:48:13 [SEVERE] java.lang.OutOfMemoryError: Java heap space
2011-07-12 00:48:15 [SEVERE] Exception in thread "Connection #210 read thread"
2011-07-12 00:48:17 [SEVERE] java.lang.OutOfMemoryError: Java heap space
2011-07-12 00:48:17 [INFO] GroupManager - INFO - Scheduled Data Saving is disabled!
2011-07-12 00:48:17 [INFO] GroupManager - INFO - Scheduled Data Saving is disabled!
2011-07-12 00:48:17 [INFO] GroupManager - INFO - Scheduled Data Saving is disabled!
2011-07-12 00:48:17 [SEVERE] Exception in thread "Connection #203 read thread"
2011-07-12 00:48:17 [SEVERE] java.lang.OutOfMemoryError: Java heap space
2011-07-12 00:48:17 [SEVERE] at java.util.Arrays.copyOf(Unknown Source)
2011-07-12 00:48:17 [INFO] GroupManager version 1.0(alpha-5) [Zombie-Version, please switch to Permissions 3] is disabled!
2011-07-12 00:48:17 [SEVERE] at java.util.Arrays.copyOf(Unknown Source)
2011-07-12 00:48:17 [SEVERE] at java.util.ArrayList.ensureCapacity(Unknown Source)
2011-07-12 00:48:17 [SEVERE] at java.util.ArrayList.add(Unknown Source)
2011-07-12 00:48:17 [SEVERE] at java.util.Collections$SynchronizedCollection.add(Unknown Source)
2011-07-12 00:48:17 [SEVERE] at net.minecraft.server.NetworkManager.g(NetworkManager.java:156)
2011-07-12 00:48:17 [INFO] [HeroicDeath] 1.8.1.156 disabled.
2011-07-12 00:48:17 [SEVERE] at net.minecraft.server.NetworkManager.c(NetworkManager.java:259)
2011-07-12 00:48:17 [SEVERE] at net.minecraft.server.NetworkReaderThread.run(SourceFile:84)
2011-07-12 00:48:17 [INFO] WorldGuard 5.2.2 disabled.
2011-07-12 00:48:18 [INFO] -------[WorldWarp]-------
2011-07-12 00:48:18 [INFO] -------[Disabled]-------
2011-07-12 00:48:18 [INFO] Saving .worlds...
2011-07-12 00:48:18 [SEVERE] Exception in thread "Connection #179 read thread"
2011-07-12 00:48:18 [SEVERE] java.lang.OutOfMemoryError: Java heap space
2011-07-12 00:48:18 [SEVERE] at java.util.Arrays.copyOf(Unknown Source)
2011-07-12 00:48:18 [INFO] -------[/WorldWarp]-------
2011-07-12 00:48:18 [INFO] Fake Permissions version 2.7.2 is disabled!
2011-07-12 00:48:18 [SEVERE] at java.util.Arrays.copyOf(Unknown Source)
2011-07-12 00:48:18 [SEVERE] at java.util.ArrayList.ensureCapacity(Unknown Source)
2011-07-12 00:48:18 [INFO] [CommandAlert] Permissions disabled, using OPS.txt
2011-07-12 00:48:18 [INFO] CraftBookCircuits: Permissions plugin detected! Using Permissions plugin for permissions.
2011-07-12 00:48:18 [SEVERE] at java.util.ArrayList.add(Unknown Source)
2011-07-12 00:48:18 [INFO] WorldEdit: Permissions plugin detected! Using Permissions plugin for permissions.
2011-07-12 00:48:18 [SEVERE] at java.util.Collections$SynchronizedCollection.add(Unknown Source)
2011-07-12 00:48:18 [INFO] WorldGuard: Permissions plugin detected! Using Permissions plugin for permissions.
2011-07-12 00:48:18 [SEVERE] at net.minecraft.server.NetworkManager.g(NetworkManager.java:156)
2011-07-12 00:48:19 [SEVERE] at net.minecraft.server.NetworkManager.c(NetworkManager.java:259)
2011-07-12 00:48:19 [SEVERE] at net.minecraft.server.NetworkReaderThread.run(SourceFile:84)
2011-07-12 00:48:19 [INFO] Saving chunks
2011-07-12 00:48:19 [SEVERE] java.lang.OutOfMemoryError: Java heap space
2011-07-12 00:48:19 [SEVERE] Exception in thread "Connection #217 read thread"
2011-07-12 00:48:20 [SEVERE] java.lang.OutOfMemoryError: Java heap space
2011-07-12 00:48:51 [INFO] Stopping server
2011-07-12

I look at it and it's all French to me... sorry for being a noob, but some help would be appreciated.

 

[SEVERE] java.lang.OutOfMemoryError: Java heap space

try increasing the HeapSize, you should find something about how to do it around here

 

Couldn't find anything... what about a plugin or program that restarts the server after a crash?

 

Please post your system specs, all those can't keep up messages let me think that your system is not good enough for a server.

also you could try a java update..
but I guess it's more a lack of RAM

 

AMD duo core 3.2 Ghz
3.5 GB RAM

I finally figured out how to allocate more heap space, seems to have been the problem. My server was running on 500 MB of RAM...

 

that indeed was the problem. My system often exceeds the 1gb limit..
also about the restarts.
It's a good idea to have a restart plugin/script on hand. I use this solution:
http://forums.bukkit.org/threads/ad...r-automatic-rebooting-and-commands-953.24652/
my restart script looks like this

Code:

BINDIR="$(dirname "$(readlink -fn "$0")")"
cd "$BINDIR"
while true
do
    java -Xincgc -Xmx1G -jar craftbukkit-0.0.1-SNAPSHOT.jar
    echo "If you want to completely stop the server process now, press Ctrl+C before the time is up!"
    echo "Restarting in:"
    for i in 10 9 8 7 6 5 4 3 2 1
    do
        echo "$i..."
        sleep 1
    done
    echo "Restarting now!"
done

 

Thank you

 

I see there is a real interest for this tweak .... so i am making a Video with some Benchmarks which will show you different configs in hardware / software and Java Configs with and without the special command line.

In the end i will call it something like "SPITAKMarks" or "PerformaSPITAK" or "Javagra"

Also there is an idea of making a small Linux from the scratch with the jdk 7 and everything tuned. So you start and enjoy ... and the name should be "SPITUX"

 

mcmyadmin should restart it for you if u get an error like this.
its free for up to 8 slot server. anything over that you need to buy it.