[HEELP] Read Timed Out error!

Code:

2011-06-28 19:33:53 [INFO] Read timed out
2011-06-28 19:41:24 [INFO] Read timed out
2011-06-28 19:59:44 [INFO] Read timed out
2011-06-28 20:00:44 [INFO] Read timed out
2011-06-28 20:09:09 [INFO] Read timed out

What can be the reason?

Code:

BetterShop.jar       LWC.jar              WorldEdit.jar
BorderGuard.jar      MagicCarpet.jar      WorldGuard.jar
Citizens.jar         Minequery.jar        iAuction.jar
CommandBook.jar      NSCommand.jar        iChat-p3.jar
DataLog.jar          NoCheat.jar          iConomy.jar
EpicGates.jar        Permissions.jar      iConomyChestShop.jar
Essentials.jar       PermissionsPlus.jar  mcMMO.jar
EssentialsSpawn.jar  PluginControl.jar    mcbans.jar
FalseBookBlock.jar   PrivateWarp.jar      p2aliases.jar
FalseBookChat.jar    RegionMarket.jar     sunset.jar
FalseBookCore.jar    VanishNoPickup.jar

b935jnks
openjdk-6
Nothing interesting before errors happened. People were just chatting..

 

Plugins? CB version? Java version? What happened right before the errors? We both know you can give us more info.

 

Code:

BetterShop.jar       LWC.jar              WorldEdit.jar
BorderGuard.jar      MagicCarpet.jar      WorldGuard.jar
Citizens.jar         Minequery.jar        iAuction.jar
CommandBook.jar      NSCommand.jar        iChat-p3.jar
DataLog.jar          NoCheat.jar          iConomy.jar
EpicGates.jar        Permissions.jar      iConomyChestShop.jar
Essentials.jar       PermissionsPlus.jar  mcMMO.jar
EssentialsSpawn.jar  PluginControl.jar    mcbans.jar
FalseBookBlock.jar   PrivateWarp.jar      p2aliases.jar
FalseBookChat.jar    RegionMarket.jar     sunset.jar
FalseBookCore.jar    VanishNoPickup.jar

b935jnks
openjdk-6
Nothing interesting before errors happened. People were just chatting..

 

Same error here.
Common plugins with riki137 :

Code:

CommandBook.jar
LWC.jar
NoCheat.jar
Permissions.jar
WorldEdit.jar
WorldGuard.jar
iConomy.jar
mcMMO.jar

CraftBukkit #935, all plugins are up to date.
3-4 times a day i have "Read Timed Out", could not stop task, just kill for ending.

Debian x64 - Same problem with java 1.6 / 1.7 beta.

problem in "src/main/java/net/minecraft/server/Packet.java" ?

Again and again,s erver kick all players, and no-one can connect to it. Only a "kill" can stop it...
Server run since 4 months without errors, and since #935 i have this.

No ideas ?

EDIT by Moderator: merged posts, please use the edit button instead of double posting.