java socket exception errors

2013-07-27 19:30:05 [INFO] [user] joined the game
java.net.SocketException: Connection reset
	at java.net.SocketInputStream.read(SocketInputStream.java:168)
	at java.io.FilterInputStream.read(FilterInputStream.java:116)
	at org.bouncycastle.crypto.io.CipherInputStream.nextChunk(Unknown Source)
	at org.bouncycastle.crypto.io.CipherInputStream.read(Unknown Source)
	at java.io.DataInputStream.readUnsignedByte(DataInputStream.java:271)
	at ex.a(SourceFile:178)
	at cn.i(SourceFile:249)
	at cn.c(SourceFile:17)
	at co.run(SourceFile:94)
 
2013-07-27 14:38:18 [SEVERE] Reached end of stream for /xx.xx.xxx.xx
java.io.IOException: Bad packet id 50
	at ex.a(SourceFile:185)
	at cn.i(SourceFile:249)
	at cn.c(SourceFile:17)
	at co.run(SourceFile:94)
2013-07-27 14:40:23 [INFO] Disconnecting [user] [/xx.xx.xx.xxx:51343]: Took too long to log in
java.io.IOException: Bad packet id 31
	at ex.a(SourceFile:185)
	at cn.i(SourceFile:249)
	at cn.c(SourceFile:17)
	at co.run(SourceFile:94)