Using SWARM plugin to manage slaves in matrix config project. the swarm jar will be executed at the time of windows startup. the slaves is up during the startup and able to run the job once, but afterwards the slave goes offline, Jenkins version is 1.523

SEVERE: I/O error in channel <machinename>
java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream.java:189)
at java.net.SocketInputStream.read(SocketInputStream.java:121)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
at java.io.BufferedInputStream.read(BufferedInputStream.java:254)
at java.io.ObjectInputStream$PeekInputStream.peek(ObjectInputStream.java:2266)
at java.io.ObjectInputStream$BlockDataInputStream.peek(ObjectInputStream.java:2559)
at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2569)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1315)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at hudson.remoting.Command.readFrom(Command.java:92)
at hudson.remoting.ClassicCommandTransport.read(ClassicCommandTransport.java:72)
at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:48)

Jul 16, 2013 4:01:05 PM jenkins.slaves.JnlpSlaveAgentProtocol$Handler$1 onClosed
WARNING: Channel reader thread: <machinename> for + <machinename> terminated
java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream.java:189)
at java.net.SocketInputStream.read(SocketInputStream.java:121)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
at java.io.BufferedInputStream.read(BufferedInputStream.java:254)
at java.io.ObjectInputStream$PeekInputStream.peek(ObjectInputStream.java:2266)
at java.io.ObjectInputStream$BlockDataInputStream.peek(ObjectInputStream.java:2559)
at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2569)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1315)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at hudson.remoting.Command.readFrom(Command.java:92)
at hudson.remoting.ClassicCommandTransport.read(ClassicCommandTransport.java:72)
at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:48)