Build step 'Execute Windows batch command' marked build as failure
ERROR: slave-tester is offline; cannot locate jdk7

和

Apr 20,2016 2:20:05 PM INFO jenkins.slaves.DefaultJnlpSlaveReceiver handle
Disconnecting slave-tester as we are reconnected from the current peer
Apr 20,2016 2:20:17 PM WARNING org.jenkinsci.remoting.nio.NioChannelHub run
Communication problem
java.io.IOException: An existing connection was forcibly closed by the remote host
    at sun.nio.ch.SocketDispatcher.read0(Native Method)
    at sun.nio.ch.SocketDispatcher.read(Unknown Source)
    at sun.nio.ch.IoUtil.readIntoNativeBuffer(Unknown Source)
    at sun.nio.ch.IoUtil.read(Unknown Source)
    at sun.nio.ch.SocketChannelImpl.read(Unknown Source)
    at org.jenkinsci.remoting.nio.FifoBuffer$Pointer.receive(FifoBuffer.java:136)
    at org.jenkinsci.remoting.nio.FifoBuffer.receive(FifoBuffer.java:306)
    at org.jenkinsci.remoting.nio.NioChannelHub.run(NioChannelHub.java:561)
    at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

Apr 20,2016 2:20:17 PM WARNING jenkins.slaves.JnlpSlaveAgentProtocol$Handler$1 onClosed
NioChannelHub keys=2 gen=88003: Computer.threadPoolForRemoting [#2] for slave-tester terminated
java.io.IOException: Connection aborted: org.jenkinsci.remoting.nio.NioChannelHub$MonoNioTransport@17d0b4b[name=xxx]
    at org.jenkinsci.remoting.nio.NioChannelHub$NioTransport.abort(NioChannelHub.java:208)
    at org.jenkinsci.remoting.nio.NioChannelHub.run(NioChannelHub.java:628)
    at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: An existing connection was forcibly closed by the remote host
    at sun.nio.ch.SocketDispatcher.read0(Native Method)
    at sun.nio.ch.SocketDispatcher.read(Unknown Source)
    at sun.nio.ch.IoUtil.readIntoNativeBuffer(Unknown Source)
    at sun.nio.ch.IoUtil.read(Unknown Source)
    at sun.nio.ch.SocketChannelImpl.read(Unknown Source)
    at org.jenkinsci.remoting.nio.FifoBuffer$Pointer.receive(FifoBuffer.java:136)
    at org.jenkinsci.remoting.nio.FifoBuffer.receive(FifoBuffer.java:306)
    at org.jenkinsci.remoting.nio.NioChannelHub.run(NioChannelHub.java:561)
    ... 6 more

奴隶日志：

<===[JENKINS REMOTING CAPACITY]===>Slave.jar version: 2.53.3
Slave.jar version: 2.53.3
This is a Windows slave
This is a Windows slave
Connection terminated
Connection terminated
ERROR: Failed to install restarter
hudson.remoting.RequestAbortedException: hudson.remoting.Channel$OrderlyShutdown
    at hudson.remoting.Request.abort(Request.java:297)
    at hudson.remoting.Channel.terminate(Channel.java:847)
    at hudson.remoting.Channel$CloseCommand.execute(Channel.java:1080)
    at hudson.remoting.Channel$1.handle(Channel.java:501)
    at hudson.remoting.AbstractByteArrayCommandTransport$1.handle(AbstractByteArrayCommandTransport.java:61)
    at org.jenkinsci.remoting.nio.NioChannelHub$2.run(NioChannelHub.java:594)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:112)
    at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
    at ......remote call to slave-tester(Native Method)
    at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1416)
    at hudson.remoting.Request.call(Request.java:172)
    at hudson.remoting.Channel.call(Channel.java:780)
    at jenkins.slaves.restarter.JnlpSlaveRestarterInstaller.install(JnlpSlaveRestarterInstaller.java:52)
    at jenkins.slaves.restarter.JnlpSlaveRestarterInstaller.access$000(JnlpSlaveRestarterInstaller.java:33)
    at jenkins.slaves.restarter.JnlpSlaveRestarterInstaller$1.call(JnlpSlaveRestarterInstaller.java:39)
    at jenkins.slaves.restarter.JnlpSlaveRestarterInstaller$1.call(JnlpSlaveRestarterInstaller.java:36)
    at jenkins.util.ContextResettingExecutorService$2.call(ContextResettingExecutorService.java:46)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: hudson.remoting.Channel$OrderlyShutdown
    at hudson.remoting.Channel$CloseCommand.execute(Channel.java:1080)
    at hudson.remoting.Channel$1.handle(Channel.java:501)
    at hudson.remoting.AbstractByteArrayCommandTransport$1.handle(AbstractByteArrayCommandTransport.java:61)
    at org.jenkinsci.remoting.nio.NioChannelHub$2.run(NioChannelHub.java:594)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:112)
    at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    ... 4 more
Caused by: Command close created at
    at hudson.remoting.Command.<init>(Command.java:56)
    at hudson.remoting.Channel$CloseCommand.<init>(Channel.java:1074)
    at hudson.remoting.Channel$CloseCommand.<init>(Channel.java:1072)
    at hudson.remoting.Channel.close(Channel.java:1156)
    at hudson.remoting.Channel.close(Channel.java:1138)
    at hudson.remoting.Channel$CloseCommand.execute(Channel.java:1079)
    at hudson.remoting.Channel$1.handle(Channel.java:501)
    at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:60)

造成这个问题的原因是什么以及如何解决？