Build failed in Jenkins: Polygene(JavaEdition)-develop-java8-checkDists #141

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See 
<https://builds.apache.org/job/Polygene(JavaEdition)-develop-java8-checkDists/141/display/redirect?page=changes>

Changes:

[paulmerlin] Feed the Rat™ with license headers

------------------------------------------
Failed to access build log

java.io.IOException: remote file operation failed: 
/home/jenkins/jenkins-slave/workspace/Polygene(JavaEdition)-develop-java8-checkDists
 at hudson.remoting.Channel@10acecf8:ubuntu-us1: 
hudson.remoting.ChannelClosedException: channel is already closed
        at hudson.FilePath.act(FilePath.java:992)
        at hudson.FilePath.act(FilePath.java:974)
        at hudson.FilePath.toURI(FilePath.java:1119)
        at hudson.tasks.MailSender.createFailureMail(MailSender.java:318)
        at hudson.tasks.MailSender.createMail(MailSender.java:179)
        at hudson.tasks.MailSender.run(MailSender.java:110)
        at hudson.tasks.Mailer.perform(Mailer.java:170)
        at 
hudson.tasks.BuildStepCompatibilityLayer.perform(BuildStepCompatibilityLayer.java:78)
        at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
        at 
hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:779)
        at 
hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:720)
        at hudson.model.Build$BuildExecution.post2(Build.java:185)
        at 
hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:665)
        at hudson.model.Run.execute(Run.java:1753)
        at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
        at hudson.model.ResourceController.execute(ResourceController.java:98)
        at hudson.model.Executor.run(Executor.java:404)
Caused by: hudson.remoting.ChannelClosedException: channel is already closed
        at hudson.remoting.Channel.send(Channel.java:604)
        at hudson.remoting.Request.call(Request.java:130)
        at hudson.remoting.Channel.call(Channel.java:821)
        at hudson.FilePath.act(FilePath.java:985)
        ... 16 more
Caused by: java.io.IOException
        at hudson.remoting.Channel.close(Channel.java:1284)
        at hudson.slaves.ChannelPinger$1.onDead(ChannelPinger.java:115)
        at hudson.remoting.PingThread.ping(PingThread.java:130)
        at hudson.remoting.PingThread.run(PingThread.java:86)
Caused by: java.util.concurrent.TimeoutException: Ping started at 1491240968010 
hasn't completed by 1491241208011
        ... 2 more