Well I added Graham's Remove-Thread-Per-Client tutorial, and Now I can't log in for some reason. I got this error.

I tried to re-log in but its says "This world is full. Please use a different world."

Code:
ClientHandler: Accepted from localhost:1295
LoginPacket size: 76, RSA packet size: 36
Client type: high memory version
dataFileVersion[0]: 0x0
dataFileVersion[1]: 0x0
dataFileVersion[2]: 0x0
dataFileVersion[3]: 0x0
dataFileVersion[4]: 0x0
dataFileVersion[5]: 0x0
dataFileVersion[6]: 0x0
dataFileVersion[7]: 0x0
dataFileVersion[8]: 0x0
UserId: 98843619
Ident: test1:test123
inStreamSessionKey[0]: 0x49c5685
inStreamSessionKey[1]: 0xc1726a
inStreamSessionKey[2]: 0x1d91ff9
inStreamSessionKey[3]: 0x13b64f0
outStreamSessionKey[0]: 0x49c56b7
outStreamSessionKey[1]: 0xc1729c
outStreamSessionKey[2]: 0x1d9202b
outStreamSessionKey[3]: 0x13b6522
ClientHandler: Client null disconnected ()
[Server]: Exception!
java.net.SocketException: Socket closed
        at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:99)
        at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
        at src.client.parseOutgoingPackets(client.java:542)
        at src.client.process(client.java:12354)
        at src.PlayerHandler.process(PlayerHandler.java:362)
        at src.process.run(process.java:25)
        at java.lang.Thread.run(Thread.java:619)
java.io.IOException: Stream closed.
        at java.net.PlainSocketImpl.available(PlainSocketImpl.java:434)
        at java.net.SocketInputStream.available(SocketInputStream.java:217)
        at src.client.process(client.java:12366)
        at src.PlayerHandler.process(PlayerHandler.java:362)
        at src.process.run(process.java:25)
        at java.lang.Thread.run(Thread.java:619)
Rs2x [fatal] - exception
[client-1-test1]: Logout
ClientHandler: Client test1 disconnected ()
ClientHandler: Accepted from localhost:1296
[client--1-Test1]: Loading Process Completed  [Regular player, lag: 16 ms]
ClientHandler: Client null disconnected ()
Stream closed.
I closed the run.bat file running the server. I opened it again and I get this.

Code:
ClientHandler: Accepted from localhost:1296
[client--1-Test1]: Loading Process Completed  [Regular player, lag: 16 ms]
ClientHandler: Client null disconnected ()
Stream closed.

How can I fix this? Please I need to know.