Build failed in Jenkins: river-qa-refactor-win2 #1

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See <https://builds.apache.org/job/river-qa-refactor-win2/1/>

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Failed to access build log

java.io.IOException: remote file operation failed: f:\hudson\hudson-slave\workspace\river-qa-refactor-win2 at hudson.remoting.Channel@7aff13d6:windows1
	at hudson.FilePath.act(FilePath.java:910)
	at hudson.FilePath.act(FilePath.java:887)
	at hudson.FilePath.toURI(FilePath.java:1036)
	at hudson.tasks.MailSender.createFailureMail(MailSender.java:279)
	at hudson.tasks.MailSender.getMail(MailSender.java:154)
	at hudson.tasks.MailSender.execute(MailSender.java:100)
	at hudson.tasks.Mailer.perform(Mailer.java:117)
	at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
	at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:785)
	at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:757)
	at hudson.model.Build$BuildExecution.post2(Build.java:183)
	at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:706)
	at hudson.model.Run.execute(Run.java:1702)
	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
	at hudson.model.ResourceController.execute(ResourceController.java:88)
	at hudson.model.Executor.run(Executor.java:231)
Caused by: hudson.remoting.ChannelClosedException: channel is already closed
	at hudson.remoting.Channel.send(Channel.java:524)
	at hudson.remoting.Request.call(Request.java:129)
	at hudson.remoting.Channel.call(Channel.java:722)
	at hudson.FilePath.act(FilePath.java:903)
	... 15 more
Caused by: java.net.SocketException: Connection reset
	at java.net.SocketInputStream.read(SocketInputStream.java:189)
	at java.net.SocketInputStream.read(SocketInputStream.java:121)
	at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
	at java.io.BufferedInputStream.read(BufferedInputStream.java:254)
	at hudson.remoting.FlightRecorderInputStream.read(FlightRecorderInputStream.java:77)
	at java.io.ObjectInputStream$PeekInputStream.peek(ObjectInputStream.java:2291)
	at java.io.ObjectInputStream$BlockDataInputStream.peek(ObjectInputStream.java:2584)
	at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2594)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1316)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
	at hudson.remoting.Command.readFrom(Command.java:92)
	at hudson.remoting.ClassicCommandTransport.read(ClassicCommandTransport.java:71)
	at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:48)