Github user haoch commented on the issue:

    https://github.com/apache/incubator-eagle/pull/715
  
    The building passed, but jenkins service crashed:
    
    ~~~
    [INFO] 
------------------------------------------------------------------------
    [INFO] BUILD SUCCESS
    [INFO] 
------------------------------------------------------------------------
    [INFO] Total time: 18:48 min
    [INFO] Finished at: 2016-12-06T08:46:05+00:00
    [INFO] Final Memory: 193M/3708M
    [INFO] 
------------------------------------------------------------------------
    Recording test results
    ERROR: Step ?Publish JUnit test result report? aborted due to exception: 
    java.io.IOException: remote file operation failed: 
/home/jenkins/jenkins-slave/workspace/incubator-eagle-pr-reviewer at 
hudson.remoting.Channel@8690f26:ubuntu-4: java.io.IOException: Remote call on 
ubuntu-4 failed
        at hudson.FilePath.act(FilePath.java:1014)
        at hudson.FilePath.act(FilePath.java:996)
        at hudson.tasks.junit.JUnitParser.parseResult(JUnitParser.java:103)
        at 
hudson.tasks.junit.JUnitResultArchiver.parse(JUnitResultArchiver.java:128)
        at 
hudson.tasks.junit.JUnitResultArchiver.perform(JUnitResultArchiver.java:149)
        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$AbstractBuildExecution.post(AbstractBuild.java:665)
        at hudson.model.Run.execute(Run.java:1766)
        at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
        at hudson.model.ResourceController.execute(ResourceController.java:98)
        at hudson.model.Executor.run(Executor.java:410)
    Caused by: java.io.IOException: Remote call on ubuntu-4 failed
        at hudson.remoting.Channel.call(Channel.java:789)
        at hudson.FilePath.act(FilePath.java:1007)
        ... 14 more
    Caused by: java.lang.NoClassDefFoundError: Could not initialize class 
org.apache.tools.ant.PropertyHelper
        at org.apache.tools.ant.Project.getReference(Project.java:2041)
        at 
org.apache.tools.ant.ComponentHelper.getComponentHelper(ComponentHelper.java:150)
        at 
org.apache.tools.ant.ComponentHelper.getElementName(ComponentHelper.java:646)
        at org.apache.tools.ant.types.DataType.getDataTypeName(DataType.java:95)
        at 
org.apache.tools.ant.types.AbstractFileSet.setupDirectoryScanner(AbstractFileSet.java:529)
        at 
org.apache.tools.ant.types.AbstractFileSet.getDirectoryScanner(AbstractFileSet.java:492)
        at 
org.apache.tools.ant.types.AbstractFileSet.getDirectoryScanner(AbstractFileSet.java:460)
        at 
hudson.tasks.junit.JUnitParser$ParseResultCallable.invoke(JUnitParser.java:127)
        at 
hudson.tasks.junit.JUnitParser$ParseResultCallable.invoke(JUnitParser.java:107)
        at hudson.FilePath$FileCallableWrapper.call(FilePath.java:2772)
        at hudson.remoting.UserRequest.perform(UserRequest.java:153)
        at hudson.remoting.UserRequest.perform(UserRequest.java:50)
        at hudson.remoting.Request$2.run(Request.java:332)
        at 
hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:68)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
        at ......remote call to ubuntu-4(Native Method)
        at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1416)
        at hudson.remoting.UserResponse.retrieve(UserRequest.java:253)
        at hudson.remoting.Channel.call(Channel.java:781)
        ... 15 more
    Putting comment on the pull request
    Finished: FAILURE
    ~~~


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