I started receiving this failure after upgrading to 1.418. Reverting to 1.417 resolves the issue.

00:09:59 ERROR: Failed to archive test reports
00:09:59 hudson.util.IOException2: remote file operation failed: /<directory> at hudson.remoting.Channel@1bcff4d:<myserver>
00:09:59 at hudson.FilePath.act(FilePath.java:754)
00:09:59 at hudson.FilePath.act(FilePath.java:740)
00:09:59 at hudson.tasks.junit.JUnitParser.parse(JUnitParser.java:83)
00:09:59 at hudson.tasks.junit.JUnitResultArchiver.parse(JUnitResultArchiver.java:123)
00:09:59 at hudson.tasks.junit.JUnitResultArchiver.perform(JUnitResultArchiver.java:135)
00:09:59 at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:19)
00:09:59 at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:664)
00:09:59 at hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:639)
00:09:59 at hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:617)
00:09:59 at hudson.model.Build$RunnerImpl.post2(Build.java:161)
00:09:59 at hudson.model.AbstractBuild$AbstractRunner.post(AbstractBuild.java:586)
00:09:59 at hudson.model.Run.run(Run.java:1400)
00:09:59 at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
00:09:59 at hudson.model.ResourceController.execute(ResourceController.java:88)
00:09:59 at hudson.model.Executor.run(Executor.java:146)
00:09:59 Caused by: java.io.InvalidClassException: hudson.util.io.ParserConfigurator$1; local class incompatible: stream classdesc serialVersionUID = 6472613931861772577, local class serialVersionUID = -2178106894481500733
00:09:59 at java.io.ObjectStreamClass.initNonProxy(Unknown Source)
00:09:59 at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
00:09:59 at java.io.ObjectInputStream.readClassDesc(Unknown Source)
00:09:59 at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
00:09:59 at java.io.ObjectInputStream.readObject0(Unknown Source)
00:09:59 at java.io.ObjectInputStream.readObject(Unknown Source)
00:09:59 at hudson.remoting.UserRequest.deserialize(UserRequest.java:182)
00:09:59 at hudson.remoting.UserRequest.perform(UserRequest.java:98)
00:09:59 at hudson.remoting.UserRequest.perform(UserRequest.java:48)
00:09:59 at hudson.remoting.Request$2.run(Request.java:283)
00:09:59 at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
00:09:59 at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
00:09:59 at java.util.concurrent.FutureTask.run(Unknown Source)
00:09:59 at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
00:09:59 at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
00:09:59 at java.lang.Thread.run(Unknown Source)
00:09:59 Build step 'Publish JUnit test result report' changed build result to FAILURE