Multithreaded flooding reliably broken with 2.20

_From [pie...@spotify.com](https://code.google.com/u/117353627959524530997/) on January 21, 2013 01:14:47_
# What steps will reproduce the problem?
1. Clone https://github.com/pcarrier/kryoflood
2. Run mvn package
3. Observe that everything runs fine with:
java -cp lib/kryonet-2.18-all.jar:target/kryoflood-1.0-SNAPSHOT.jar com.github.pcarrier.kryoflood.Main cs 1
4. Observe that everything breaks with:
java -cp lib/kryonet-2.18-all.jar:target/kryoflood-1.0-SNAPSHOT.jar com.github.pcarrier.kryoflood.Main cs 2
5. When digging, please be patient with my benchmark coding style :)

# What is the expected output? What do you see instead?

The server goes BufferOverflowException as soon as there are more than one client.

# What version of the product are you using? On what operating system?

I am using kryonet-2.18-all.jar from kryonet-2.20.zip. Not sure which version that is.

# Please provide any additional information below.

Usage:
"cs" to run a client and a server that floods it with UDP messages
"csu 20" to run 20 clients and a server that floods them with TCP messages
(c for client(s), s for server, u for UDP, followed by a number to have multiple clients)

This is the output with 2 clients:
--- 8< ---
% java -cp lib/kryonet-2.18-all.jar:target/kryoflood-1.0-SNAPSHOT.jar com.github.pcarrier.kryoflood.Main cs 2
0: Infinity msg/s
1: Infinity msg/s
0 connected!
1 connected!
Exception in thread "Server@1" java.nio.BufferOverflowException
at java.nio.HeapByteBuffer.put(HeapByteBuffer.java:183)
at com.esotericsoftware.kryo.io.ByteBufferOutputStream.write(ByteBufferOutputStream.java:42)
at com.esotericsoftware.kryo.io.Output.flush(Output.java:154)
at com.esotericsoftware.kryonet.KryoSerialization.write(KryoSerialization.java:51)
at com.esotericsoftware.kryonet.TcpConnection.send(TcpConnection.java:192)
at com.esotericsoftware.kryonet.Connection.sendTCP(Connection.java:59)
at com.github.pcarrier.kryoflood.Main$1$1.run(Main.java:43)
Exception in thread "Client" com.esotericsoftware.kryonet.KryoNetException: Incorrect number of bytes (12 remaining) used to deserialize object: SimpleTest(id=456673020, message=Hello!)
at com.esotericsoftware.kryonet.TcpConnection.readObject(TcpConnection.java:146)
at com.esotericsoftware.kryonet.Client.update(Client.java:239)
at com.esotericsoftware.kryonet.Client.run(Client.java:317)
at java.lang.Thread.run(Thread.java:722)
Exception in thread "Client" com.esotericsoftware.kryonet.KryoNetException: Invalid object length: 0
at com.esotericsoftware.kryonet.TcpConnection.readObject(TcpConnection.java:116)
at com.esotericsoftware.kryonet.Client.update(Client.java:239)
at com.esotericsoftware.kryonet.Client.run(Client.java:317)
at java.lang.Thread.run(Thread.java:722)
--- >8 ---

Whereas with one client, everything runs fine:
--- 8< ---
% java -cp lib/kryonet-2.18-all.jar:target/kryoflood-1.0-SNAPSHOT.jar com.github.pcarrier.kryoflood.Main cs 1
0: Infinity msg/s
0 connected!
0: 107526.88 msg/s
0: 172117.05 msg/s
0: 157480.31 msg/s
0: 153374.23 msg/s
0: 149700.6 msg/s
0: 154320.98 msg/s
0: 167224.08 msg/s
0: 186219.73 msg/s
0: 168918.92 msg/s
0: 169204.73 msg/s
--- >8 ---

_Original issue: http://code.google.com/p/kryonet/issues/detail?id=30_