title: Jenkins: FATAL: Could not initialize class hudson.util.ProcessTree$UnixReflection
body: <pre><code>FATAL: Could not initialize class hudson.util.ProcessTree$UnixReflection
  java.lang.NoClassDefFoundError: Could not initialize class hudson.util.ProcessTree$UnixReflection
  at hudson.util.ProcessTree$UnixProcess.kill(ProcessTree.java:647)
  at hudson.util.ProcessTree$UnixProcess.killRecursively(ProcessTree.java:668)
  at hudson.util.ProcessTree$UnixProcess.killRecursively(ProcessTree.java:667)
  at hudson.util.ProcessTree$Unix.killAll(ProcessTree.java:589)
  at hudson.Launcher$LocalLauncher.kill(Launcher.java:949)
  at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:502)
  at hudson.model.Run.execute(Run.java:1737)
  at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
  at hudson.model.ResourceController.execute(ResourceController.java:97)
  at hudson.model.Executor.run(Executor.java:421)
  </code></pre>
  
  <p>Jenkins ver. 2.73.3
  MacOSx</p>
  
  <p>Doing an iOS build and upload to hockeyapp.  The .ipa is created successfully, error seems to happen afterwards, seems like on the hockeyapp upload.  I have an android project that works and uploads to hockeyapp successfully though.</p>
  
  <p>Started getting this today after updating Jenkins and plugins.  Was working before. </p>
  
  <p>Any ideas?</p>