Random disconnections of players.

I keep getting this error randomly during server uptime, it promptly kicks all players off the server and gives this error for each player.

Code:

2011-09-26 23:25:24 [INFO] /[IPHERE] lost connection
2011-09-26 23:25:36 [INFO] Connection reset
2011-09-26 23:25:36 [SEVERE] java.net.SocketException: Software caused connection abort: socket write error
2011-09-26 23:25:36 [SEVERE] 	at java.net.SocketOutputStream.socketWrite0(Native Method)
2011-09-26 23:25:36 [SEVERE] 	at java.net.SocketOutputStream.socketWrite(Unknown Source)
2011-09-26 23:25:36 [SEVERE] 	at java.net.SocketOutputStream.write(Unknown Source)
2011-09-26 23:25:36 [SEVERE] 	at java.io.BufferedOutputStream.flushBuffer(Unknown Source)
2011-09-26 23:25:36 [SEVERE] 	at java.io.BufferedOutputStream.flush(Unknown Source)
2011-09-26 23:25:36 [SEVERE] 	at java.io.DataOutputStream.flush(Unknown Source)
2011-09-26 23:25:36 [SEVERE] 	at net.minecraft.server.NetworkWriterThread.run(SourceFile:104)
2011-09-26 23:25:36 [SEVERE] java.net.SocketException: Software caused connection abort: socket write error
2011-09-26 23:25:36 [SEVERE] 	at java.net.SocketOutputStream.socketWrite0(Native Method)
2011-09-26 23:25:36 [SEVERE] 	at java.net.SocketOutputStream.socketWrite(Unknown Source)
2011-09-26 23:25:36 [INFO] Lildirt lost connection: disconnect.endOfStream
2011-09-26 23:25:36 [SEVERE] 	at java.net.SocketOutputStream.write(Unknown Source)
2011-09-26 23:25:36 [SEVERE] 	at java.io.BufferedOutputStream.flushBuffer(Unknown Source)
2011-09-26 23:25:36 [SEVERE] 	at java.io.BufferedOutputStream.flush(Unknown Source)
2011-09-26 23:25:36 [SEVERE] 	at java.io.DataOutputStream.flush(Unknown Source)
2011-09-26 23:25:36 [SEVERE] 	at net.minecraft.server.NetworkWriterThread.run(SourceFile:104)
2011-09-26 23:26:00 [INFO] Connection reset
2011-09-26 23:26:00 [INFO] /[IP HERE] lost connection

What does it mean? What can I do to prevent it?

EDIT: Is this just my internet being crappy? I read something about this and heard that "java.net.SocketException: Software caused connection abort: socket write error
at java.net.SocketOutputStream.socketWrite0(Native Method)" means that my internet has shut the connection/port.