Planet Minecraft

Hello, I have had a Minecraft server for a while, but recently, since about 1.0.0, it has been crashing regularly. This has scared many away from my server and makes it hard to have a good server. This is the error log I get when it crashes...

2012-04-17 14:45:44 [SEVERE] java.net.SocketException: Socket closed
2012-04-17 14:45:44 [SEVERE] at java.net.SocketOutputStream.socketWrite(Unknown Source)
2012-04-17 14:45:44 [SEVERE] at java.net.SocketOutputStream.write(Unknown Source)
2012-04-17 14:45:44 [SEVERE] at java.io.BufferedOutputStream.flushBuffer(Unknown Source)
2012-04-17 14:45:44 [SEVERE] at java.io.BufferedOutputStream.flush(Unknown Source)
2012-04-17 14:45:44 [SEVERE] at java.io.DataOutputStream.flush(Unknown Source)
2012-04-17 14:45:44 [SEVERE] at net.minecraft.server.NetworkWriterThread.run(SourceFile:103)

I would love some help on what is causing this, and what I can do to stop it.
NOTICE: I have many plugins, full list is as follows...
iConomy
ChestShop
Factions
Essentials(all of them)
LWC
MobDisguise
JSONAPI
dynmap
NoCheat
Observer
Votifier
VanishNoPacket
WorldEdit
TravelPortals
PluginMetrics

Plugins are not the problem.

It haz to do with internet connection and the tye of router u have. it happens to me and i get really mad

Plugins are not the problem.

It haz to do with internet connection and the tye of router u have. it happens to me and i get really mad

Can you explain further? What shoul I do about it?

I hate to have to bump this thread, But I am experiencing the same exact issue.

I have Comcast Business class internet the $99 plan and I am getting this error almost every 30 minutes or so.

Is there any fix or explanation for this?