Hexxit server issue

[Manji022]

I am having a lot of trouble with the server and one particular player all of a sudden. He has been on the server since I started it and has never had any major issues. Now I can not get him logged on. Other players are fine, he just can not get on. Here is what the server says:

2016-04-03 19:57:14 [INFO] [STDERR] java.net.SocketException: Connection reset by peer: socket write error
2016-04-03 19:57:14 [INFO] [STDERR]     at java.net.SocketOutputStream.socketWrite0(Native Method)
2016-04-03 19:57:14 [INFO] [STDERR]     at java.net.SocketOutputStream.socketWrite(Unknown Source)
2016-04-03 19:57:14 [INFO] [STDERR]     at java.net.SocketOutputStream.write(Unknown Source)
2016-04-03 19:57:14 [INFO] [STDERR]     at org.bouncycastle.crypto.io.CipherOutputStream.write(Unknown Source)
2016-04-03 19:57:14 [INFO] [STDERR]     at java.io.BufferedOutputStream.flushBuffer(Unknown Source)
2016-04-03 19:57:14 [INFO] [STDERR]     at java.io.BufferedOutputStream.write(Unknown Source)
2016-04-03 19:57:14 [INFO] [STDERR]     at java.io.DataOutputStream.write(Unknown Source)
2016-04-03 19:57:14 [INFO] [STDERR]     at java.io.FilterOutputStream.write(Unknown Source)
2016-04-03 19:57:14 [INFO] [STDERR]     at net.minecraft.network.packet.Packet250CustomPayload.func_73273_a(SourceFile:53)
2016-04-03 19:57:14 [INFO] [STDERR]     at net.minecraft.network.packet.Packet.func_73266_a(Packet.java:193)
2016-04-03 19:57:14 [INFO] [STDERR]     at net.minecraft.network.TcpConnection.func_74459_h(TcpConnection.java:204)
2016-04-03 19:57:14 [INFO] [STDERR]     at net.minecraft.network.TcpConnection.func_74451_d(TcpConnection.java:555)
2016-04-03 19:57:14 [INFO] [STDERR]     at net.minecraft.network.TcpWriterThread.run(SourceFile:115)
2016-04-03 19:57:14 [INFO] [STDERR] java.net.SocketException: Connection reset
2016-04-03 19:57:14 [INFO] [STDERR]     at java.net.SocketInputStream.read(Unknown Source)
2016-04-03 19:57:14 [INFO] [STDERR]     at java.net.SocketInputStream.read(Unknown Source)
2016-04-03 19:57:14 [INFO] [STDERR]     at java.io.FilterInputStream.read(Unknown Source)
2016-04-03 19:57:14 [INFO] [STDERR]     at org.bouncycastle.crypto.io.CipherInputStream.nextChunk(Unknown Source)
2016-04-03 19:57:14 [INFO] [STDERR]     at org.bouncycastle.crypto.io.CipherInputStream.read(Unknown Source)
2016-04-03 19:57:14 [INFO] [STDERR]     at java.io.FilterInputStream.read(Unknown Source)
2016-04-03 19:57:14 [INFO] [STDERR]     at net.minecraft.network.packet.Packet.func_73272_a(Packet.java:144)
2016-04-03 19:57:14 [INFO] [STDERR]     at net.minecraft.network.TcpConnection.func_74447_i(TcpConnection.java:327)
2016-04-03 19:57:14 [INFO] [STDERR]     at net.minecraft.network.TcpConnection.func_74450_c(TcpConnection.java:547)
2016-04-03 19:57:14 [INFO] [STDERR]     at net.minecraft.network.TcpReaderThread.run(SourceFile:94)

Anyone have any idea how to help him out?