Login Error

Code:

java.net.SocketException: Connection reset
        at java.net.SocketInputStream.read(Unknown Source)
        at java.net.SocketInputStream.read(Unknown Source)
        at java.io.FilterInputStream.read(Unknown Source)
        at net.minecraft.server.Packet.b(SourceFile:102)
        at net.minecraft.server.NetworkManager.f(SourceFile:157)
        at net.minecraft.server.NetworkManager.c(SourceFile:15)
        at net.minecraft.server.NetworkReaderThread.run(SourceFile:68)
java.net.SocketException: Connection reset by peer: socket write error
        at java.net.SocketOutputStream.socketWrite0(Native Method)
        at java.net.SocketOutputStream.socketWrite(Unknown Source)
        at java.net.SocketOutputStream.write(Unknown Source)
        at java.io.DataOutputStream.write(Unknown Source)
        at net.minecraft.server.Packet.a(SourceFile:113)
        at net.minecraft.server.NetworkManager.e(SourceFile:132)
        at net.minecraft.server.NetworkManager.d(SourceFile:15)
        at net.minecraft.server.NetworkWriterThread.run(SourceFile:85)

I updated to the lates version of craftbukkit and i frequently get this error message. Well, my Players do.
They can login if they try a few times but i want it to connect smoother. Like it did two craftbukkit-updates ago.

What does this error message mean and how can I fix it?

 

Likewise, but my error spam is

Code:

java.net.ConnectException: Connection timed out: connect
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.PlainSocketImpl.doConnect(Unknown Source)
        at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
        at java.net.PlainSocketImpl.connect(Unknown Source)
        at java.net.SocksSocketImpl.connect(Unknown Source)
        at java.net.Socket.connect(Unknown Source)
        at java.net.Socket.connect(Unknown Source)
        at sun.net.NetworkClient.doConnect(Unknown Source)
        at sun.net.www.http.HttpClient.openServer(Unknown Source)
        at sun.net.www.http.HttpClient.openServer(Unknown Source)
        at sun.net.www.http.HttpClient.<init>(Unknown Source)
        at sun.net.www.http.HttpClient.New(Unknown Source)
        at sun.net.www.http.HttpClient.New(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown
Source)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Sour
ce)
        at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.followRedirect(Unknown So
urce)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown So
urce)
        at java.net.URL.openStream(Unknown Source)
        at net.minecraft.server.ThreadLoginVerifier.run(SourceFile:96)
java.io.IOException: Server returned HTTP response code: 503 for URL: http://www
.minecraft.net/game/checkserver.jsp?user=Izbay&serverId=1ec2b5382b986392
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown So
urce)
        at java.net.URL.openStream(Unknown Source)
        at net.minecraft.server.ThreadLoginVerifier.run(SourceFile:96)

This started with a recent update, and does allow connection after 10-20 tries... but is quite annoying.

 

minecraft.net is under a lot of load

 

Is that definite? I'm getting the same error for only one person(it seems) on my server.