server >killed (thats error!) help?

ok we have been running a minecraft server since december (hmod then bukkit) so i like to believe this is not a noob error but hay could be lol

last night our server crashed and the log file showed

Code:

lines above here were players talking to each other but no errors
20:49:41 [INFO] [Showcase] Autosaved
>Killed

its done it 3 more times, different players online, different numbers of players, once with only 2 players online

we use ubuntu 64bit desktop
it has 3 gigs of ram
our start up code hasnt changed for umm months but is

Code:

#!/bin/sh
java -d64 -Xincgc -Xmx2824M -jar craftbukkit.jar

plugin list is large but has never been an issue (all latest version as of yesterday)

Code:

bigbrother
citizens
dynmap
mobbounty
preciousstones
ichat
stargate
tables
dwarf forge
myhome
iconomy
gravelclay1.3.1
mcmmo
cenotaph
lwc
voxelport
exactspawn
nocheat
basebukkitplugin
servergoblins
autosave
permissions
magicspells
multiverse
propertime
showcase
creeperrods
longgrass
appleseed
inception
falsebookIC
falsebookextra
falsebook core
obujustshutthehellup
xsigns
commandbook
worldedit (this one may be an older version as i havent updated it but its working)
minecartmaniasigncommands
minecartmaniacore
thundertower
minecartmaniaadmincontrols
elevators
minecartmaniachestcontrol
minecartmaniastation
minecartmaniaautocart
minecartmaniaautomations
fencestack
controllerblock
bigcatch
mcbans
serverevents

man thats a long list... the only recent editions to it is  canotaph and lwc (we love lwc, love it love it love it...bet thats the problem lol)

we are ofcourse on the latest RB of craft bukkit ( 953 ) hmmm i cant think of any more relevent information to give u guys, we just want to either stop the server suddenly dieing (well ok not either, as that is the goal) or/and get it to give is more useful error message so we can find the problem, im wondering if its an issue with the pc itself maybe java is out of date, but that error is in the log ">killed"

oh maybe relevent we use mysql for icon bukkit precious stones etc and the only other thing the pc is used for is mediatomb and no one has used that function while the crashes have happened

any advice, tips or help greatly appreciated

***edit****
i take it back killed is not in the log just the terminal output..so it is ubuntu, but why is it turning on us all of a sudden ?

 

fixed by removing citizens, lag vanished and it hasnt crashed yet

 

Same here only wer running on windows server 2008 R2

 

this is work or not???

i have same trouble .. see...
Please fix this...


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It means someone killed the java process. You might need to monitor your Task manager and see whats killing the java process.

 

that is auto kill screen.. how to off them?

 

please help meee joereider

 

Well, what OS do you use?