java.lang.NullPointerException
	at org.jenkinsci.plugins.proccleaner.PsBasedUnixProcessTree.createProcessTreeFor(PsBasedUnixProcessTree.java:64)
	at org.jenkinsci.plugins.proccleaner.PsKiller.kill(PsKiller.java:51)
	at org.jenkinsci.plugins.proccleaner.PsCleaner.clean(PsCleaner.java:69)
	at org.jenkinsci.plugins.proccleaner.ProcCleaner$CleanRequest.call(ProcCleaner.java:127)
	at org.jenkinsci.plugins.proccleaner.ProcCleaner$CleanRequest.call(ProcCleaner.java:116)
	at hudson.remoting.UserRequest.perform(UserRequest.java:121)
	at hudson.remoting.UserRequest.perform(UserRequest.java:49)
	at hudson.remoting.Request$2.run(Request.java:326)
	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 ci-osp-rhel7-7427(Native Method)
	at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1413)
	at hudson.remoting.UserResponse.retrieve(UserRequest.java:221)
	at hudson.remoting.Channel.call(Channel.java:778)
	at org.jenkinsci.plugins.proccleaner.ProcCleaner.performCleanup(ProcCleaner.java:105)
	at org.jenkinsci.plugins.proccleaner.PreBuildCleanup.preCheckout(PreBuildCleanup.java:54)
	at jenkins.scm.SCMCheckoutStrategy.preCheckout(SCMCheckoutStrategy.java:76)
	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:530)
	at hudson.model.Run.execute(Run.java:1738)
	at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:531)
	at hudson.model.ResourceController.execute(ResourceController.java:98)
	at hudson.model.Executor.run(Executor.java:381)