We run a number of jenkins builds on slave machines. Approximately 1 in 20 builds will complete successfully but then fails with the following stack trace - apparently just about as it's ready to report that success. We eventually tracked it down to using java-8-openjdk on the master and java-9-openjdk on the slave. When the slave was switch to java-8-openjdk as well, then the problem disappeared.

Some apparently similar bugs which look different upon closer inspection:

https://issues.jenkins-ci.org/browse/JENKINS-21341

https://issues.jenkins-ci.org/browse/JENKINS-22492

Possible solutions:

1) Fix this particular incompatibility with java-9-openjdk

2) Perhaps visibly prompt users to check when different java defaults on master and slave machine

Stack trace for 1 in 20 failure:
+ exit 0
FATAL: Remote call on ca-g2-01 failed
java.lang.NoClassDefFoundError: Could not initialize class hudson.util.ProcessTree$UnixReflection
{{ at hudson.util.ProcessTree$UnixProcess.kill(ProcessTree.java:647)}}
{{ at hudson.util.ProcessTree$UnixProcess.killRecursively(ProcessTree.java:668)}}
{{ at hudson.util.ProcessTree$Unix.killAll(ProcessTree.java:589)}}
{{ at hudson.Launcher$RemoteLauncher$KillTask.call(Launcher.java:996)}}
{{ at hudson.Launcher$RemoteLauncher$KillTask.call(Launcher.java:987)}}
{{ at hudson.remoting.UserRequest.perform(UserRequest.java:153)}}
{{ at hudson.remoting.UserRequest.perform(UserRequest.java:50)}}
{{ at hudson.remoting.Request$2.run(Request.java:336)}}
{{ at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:68)}}
{{ at java.util.concurrent.FutureTask.run(FutureTask.java:266)}}
{{ at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1158)}}
{{ at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:632)}}
{{ at java.lang.Thread.run(Thread.java:804)}}
{{ at ......remote call to ca-g2-01(Native Method)}}
{{ at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1545)}}
{{ at hudson.remoting.UserResponse.retrieve(UserRequest.java:253)}}
{{ at hudson.remoting.Channel.call(Channel.java:830)}}
Caused: java.io.IOException: Remote call on ca-g2-01 failed
{{ at hudson.remoting.Channel.call(Channel.java:838)}}
{{ at hudson.Launcher$RemoteLauncher.kill(Launcher.java:984)}}
{{ at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:496)}}
{{ at hudson.model.Run.execute(Run.java:1735)}}
{{ at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)}}
{{ at hudson.model.ResourceController.execute(ResourceController.java:97)}}
{{ at hudson.model.Executor.run(Executor.java:405)}}
Recording test results
Finished: FAILURE