Jenkins从节点上构建自动化测试项目时报错：java.io.IOException: Unexpected termination of the channel

在mac电脑上配置了Jenkins从节点，在该从节点上构建app UI 自动化测试项目，运行一些用例后报如下错误：

java.io.EOFException
	at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2638)
	at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:3113)
	at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:853)
	at java.io.ObjectInputStream.<init>(ObjectInputStream.java:349)
	at hudson.remoting.ObjectInputStreamEx.<init>(ObjectInputStreamEx.java:49)
	at hudson.remoting.Command.readFrom(Command.java:140)
	at hudson.remoting.Command.readFrom(Command.java:126)
	at hudson.remoting.AbstractSynchronousByteArrayCommandTransport.read(AbstractSynchronousByteArrayCommandTransport.java:36)
	at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:63)
Caused: java.io.IOException: Unexpected termination of the channel
	at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:77)
Caused: java.io.IOException: Backing channel 'app-ui-test' is disconnected.
	at hudson.remoting.RemoteInvocationHandler.channelOrFail(RemoteInvocationHandler.java:214)
	at hudson.remoting.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:283)
	at com.sun.proxy.$Proxy129.isAlive(Unknown Source)
	at hudson.Launcher$RemoteLauncher$ProcImpl.isAlive(Launcher.java:1150)
	at hudson.Launcher$RemoteLauncher$ProcImpl.join(Launcher.java:1142)
	at hudson.tasks.CommandInterpreter.join(CommandInterpreter.java:155)
	at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:109)
	at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:66)
	at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
	at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:741)
	at hudson.model.Build$BuildExecution.build(Build.java:206)
	at hudson.model.Build$BuildExecution.doRun(Build.java:163)
	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:504)
	at hudson.model.Run.execute(Run.java:1818)
	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
	at hudson.model.ResourceController.execute(ResourceController.java:97)
	at hudson.model.Executor.run(Executor.java:429)
FATAL: Unable to delete script file /var/folders/__/x9pk6npn47g1g4t_n7t6h_t80000gn/T/jenkins5263477407196692208.sh
java.io.EOFException
	at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2638)
	at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:3113)
	at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:853)
	at java.io.ObjectInputStream.<init>(ObjectInputStream.java:349)
	at hudson.remoting.ObjectInputStreamEx.<init>(ObjectInputStreamEx.java:49)
	at hudson.remoting.Command.readFrom(Command.java:140)
	at hudson.remoting.Command.readFrom(Command.java:126)
	at hudson.remoting.AbstractSynchronousByteArrayCommandTransport.read(AbstractSynchronousByteArrayCommandTransport.java:36)
	at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:63)
Caused: java.io.IOException: Unexpected termination of the channel
	at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:77)
Caused: hudson.remoting.ChannelClosedException: Channel "unknown": Remote call on app-ui-test failed. The channel is closing down or has closed down
	at hudson.remoting.Channel.call(Channel.java:950)
	at hudson.FilePath.act(FilePath.java:1070)
	at hudson.FilePath.act(FilePath.java:1059)
	at hudson.FilePath.delete(FilePath.java:1540)
	at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:123)
	at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:66)
	at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
	at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:741)
	at hudson.model.Build$BuildExecution.build(Build.java:206)
	at hudson.model.Build$BuildExecution.doRun(Build.java:163)
	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:504)
	at hudson.model.Run.execute(Run.java:1818)
	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
	at hudson.model.ResourceController.execute(ResourceController.java:97)
	at hudson.model.Executor.run(Executor.java:429)
Build step 'Execute shell' marked build as failure
Checking console output
[BFA] Scanning build for known causes...
[BFA] No failure causes found
[BFA] Done. 0s
Finished: FAILURE

原因：暂未知。因为是执行了一些用例之后才报错，所以从节点配置应该是没什么问题。

解决方法：重启Jenkins。重新启动Jenkins后再次构建项目，不报该错误。

重启Jenkins方法：

• 登陆Jenkins的web管理页面，在页面网址后面加上/restart，回车；

• 点击【是】或【Yes】按钮，等待页面刷新即可。