INFO: Ping failed. Terminating the channel.
java.util.concurrent.TimeoutException: Ping started on 1456918109582 hasn't completed at 1456918349582
	at hudson.remoting.PingThread.ping(PingThread.java:125)
	at hudson.remoting.PingThread.run(PingThread.java:86)

Mar 02, 2016 6:32:29 AM hudson.remoting.SynchronousCommandTransport$ReaderThread run
SEVERE: I/O error in channel channel
java.net.SocketException: Socket closed
	at java.net.SocketInputStream.read(SocketInputStream.java:190)
	at java.net.SocketInputStream.read(SocketInputStream.java:122)
	at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
	at java.io.BufferedInputStream.read(BufferedInputStream.java:254)
	at hudson.remoting.FlightRecorderInputStream.read(FlightRecorderInputStream.java:82)
	at hudson.remoting.ChunkedInputStream.readHeader(ChunkedInputStream.java:72)
	at hudson.remoting.ChunkedInputStream.readUntilBreak(ChunkedInputStream.java:103)
	at hudson.remoting.ChunkedCommandTransport.readBlock(ChunkedCommandTransport.java:33)
	at hudson.remoting.AbstractSynchronousByteArrayCommandTransport.read(AbstractSynchronousByteArrayCommandTransport.java:34)
	at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:48)

Mar 02, 2016 6:32:29 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Terminated
Mar 02, 2016 6:32:39 AM jenkins.slaves.restarter.JnlpSlaveRestarterInstaller$2$1 onReconnect
INFO: Restarting slave via jenkins.slaves.restarter.UnixSlaveRestarter@6523ff4a
Mar 02, 2016 6:32:42 AM hudson.remoting.jnlp.Main createEngine
INFO: Setting up slave: dev127-virt2
Mar 02, 2016 6:32:42 AM hudson.remoting.jnlp.Main$CuiListener <init>
INFO: Jenkins agent is running in headless mode.
Mar 02, 2016 6:32:42 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Locating server among [http://jenkins.acme.com/hudson/, http://hudson.acme.com/hudson/]
Mar 02, 2016 6:32:42 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Connecting to jenkins.acme.com:37003
Mar 02, 2016 6:32:42 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Handshaking
Mar 02, 2016 6:32:42 AM hudson.remoting.jnlp.Main$CuiListener error
SEVERE: The server rejected the connection: dev127-virt2 is already connected to this master. Rejecting this connection.
java.lang.Exception: The server rejected the connection: dev127-virt2 is already connected to this master. Rejecting this connection.
	at hudson.remoting.Engine.onConnectionRejected(Engine.java:306)
	at hudson.remoting.Engine.run(Engine.java:276)

JNLP agent connected from /10.16.180.145
<===[JENKINS REMOTING CAPACITY]===>ERROR: Connection terminated
Connection terminated
ha:AAAAWB+LCAAAAAAAAP9b85aBtbiIQSmjNKU4P08vOT+vOD8nVc8DzHWtSE4tKMnMz/PLL0ldFVf2c+b/lb5MDAwVRQxSaBqcITRIIQMEMIIUFgAAckCEiWAAAAA=java.io.IOException: Connection aborted: org.jenkinsci.remoting.nio.NioChannelHub$MonoNioTransport@131dbee3[name=dev127-virt2]
	at org.jenkinsci.remoting.nio.NioChannelHub$NioTransport.abort(NioChannelHub.java:211)
	at org.jenkinsci.remoting.nio.NioChannelHub.run(NioChannelHub.java:631)
	at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
	at java.lang.Thread.run(Thread.java:662)
Caused by: java.io.IOException: Broken pipe
	at sun.nio.ch.FileDispatcher.write0(Native Method)
	at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:29)
	at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:69)
	at sun.nio.ch.IOUtil.write(IOUtil.java:40)
	at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:336)
	at org.jenkinsci.remoting.nio.FifoBuffer$Pointer.send(FifoBuffer.java:130)
	at org.jenkinsci.remoting.nio.FifoBuffer.send(FifoBuffer.java:254)
	at org.jenkinsci.remoting.nio.NioChannelHub.run(NioChannelHub.java:622)
	... 7 more
Slave.jar version: 2.47
This is a Unix slave
Slave successfully connected and online
Connection terminated

2016-03-02 06:32:38,352 WARNING [hudson.node_monitors.AbstractAsyncNodeMonitorDescriptor] (Monitoring thread for Clock Difference started on Wed Mar 02 06:32:08 EST 2016) Failed to monitor dev127-virt2 for Clock Difference
java.util.concurrent.TimeoutException
  at hudson.remoting.Request$1.get(Request.java:271)
  at hudson.remoting.Request$1.get(Request.java:206)
  at hudson.remoting.FutureAdapter.get(FutureAdapter.java:59)
  at hudson.node_monitors.AbstractAsyncNodeMonitorDescriptor.monitor(AbstractAsyncNodeMonitorDescriptor.java:97)
  at hudson.node_monitors.AbstractNodeMonitorDescriptor$Record.run(AbstractNodeMonitorDescriptor.java:280)

... (All monitors times out)

2016-03-02 06:32:42,860 INFO  [hudson.TcpSlaveAgentListener] (TCP slave agent connection handler #41773 with /10.16.180.145:58248) Accepted connection #41773 from /10.16.180.145:58248
2016-03-02 06:32:42,865 WARNING [jenkins.slaves.JnlpSlaveHandshake] (TCP slave agent connection handler #41773 with /10.16.180.145:58248) TCP slave agent connection handler #41773 with /10.16.180.145:58248 is aborted: dev127-virt2 is already connected to this master. Rejecting this connection.
2016-03-02 06:32:42,866 WARNING [jenkins.slaves.JnlpSlaveHandshake] (TCP slave agent connection handler #41773 with /10.16.180.145:58248) TCP slave agent connection handler #41773 with /10.16.180.145:58248 is aborted: Unrecognized name: dev127-virt2

...

2016-03-02 06:33:43,630 INFO  [hudson.slaves.ChannelPinger] (Ping thread for channel hudson.remoting.Channel@5caca20e:dev127-virt2) Ping failed. Terminating the channel.
java.util.concurrent.TimeoutException: Ping started on 1456918183629 hasn't completed at 1456918423630
  at hudson.remoting.PingThread.ping(PingThread.java:125)
  at hudson.remoting.PingThread.run(PingThread.java:86)

...

2016-03-02 06:38:26,902 WARNING [hudson.node_monitors.AbstractAsyncNodeMonitorDescriptor] (Monitoring thread for Free Temp Space started on Wed Mar 02 06:38:26 EST 2016) Failed to monitor dev127-virt2 for Free Temp Space
hudson.remoting.ChannelClosedException: channel is already closed
  at hudson.remoting.Channel.send(Channel.java:549)
  at hudson.remoting.Request.callAsync(Request.java:204)
  at hudson.remoting.Channel.callAsync(Channel.java:778)
  at hudson.node_monitors.AbstractAsyncNodeMonitorDescriptor.monitor(AbstractAsyncNodeMonitorDescriptor.java:76)
  at hudson.node_monitors.AbstractNodeMonitorDescriptor$Record.run(AbstractNodeMonitorDescriptor.java:280)
Caused by: java.io.IOException
  at hudson.remoting.Channel.close(Channel.java:1105)
  at hudson.slaves.ChannelPinger$1.onDead(ChannelPinger.java:110)
  at hudson.remoting.PingThread.ping(PingThread.java:125)
  at hudson.remoting.PingThread.run(PingThread.java:86)
Caused by: java.util.concurrent.TimeoutException: Ping started on 1456918183629 hasn't completed at 1456918423630
  ... 2 more

... (All monitors fails with "channel is already closed")