Job starts on slave and fails directly at SCM checkout with this message :

_Started by user Alexandre Aubert | AT Internet
[EnvInject] - Loading node environment variables.
Building remotely on Quality - BDXBLD005 (Quality) in workspace D:\Jenkins\workspace\Quality\Confirmation_tests_stag

FATAL: Jenkins has not been started, or was already shut down
java.lang.IllegalStateException: Jenkins has not been started, or was already shut down
at jenkins.model.Jenkins.getInstance(Jenkins.java:766)
at hudson.scm.SubversionSCM.descriptor(SubversionSCM.java:2544)
at hudson.scm.SubversionSCM.createDefaultSVNOptions(SubversionSCM.java:1043)
at hudson.scm.SubversionSCM.createClientManager(SubversionSCM.java:1033)
at hudson.scm.SubversionSCM$CheckOutTask.invoke(SubversionSCM.java:965)
at hudson.scm.SubversionSCM$CheckOutTask.invoke(SubversionSCM.java:945)
at hudson.FilePath$FileCallableWrapper.call(FilePath.java:2772)
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$1.call(InterceptingExecutorService.java:68)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at hudson.remoting.Engine$1$1.run(Engine.java:69)
at java.lang.Thread.run(Unknown Source)
at ......remote call to Quality - BDXBLD005(Native Method)
at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1416)
at hudson.remoting.UserResponse.retrieve(UserRequest.java:252)
at hudson.remoting.Channel.call(Channel.java:781)
at hudson.FilePath.act(FilePath.java:1007)
at hudson.FilePath.act(FilePath.java:996)
at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:894)
at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:830)
at hudson.scm.SCM.checkout(SCM.java:485)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1269)
at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:604)
at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:529)
at hudson.model.Run.execute(Run.java:1741)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:98)
at hudson.model.Executor.run(Executor.java:410)
Archiving artifacts

Recording test results
ERROR: Step ‘Publish JUnit test result report’ failed: Test reports were found but none of them are new. Did tests run?
For example, D:\Jenkins\workspace\Quality\Confirmation_tests_stag\reports\TEST-Confirmation_tests.xml is 2 hr 11 min old

Notifying upstream projects of job completion
No emails were triggered.
Finished: FAILURE_

Reverting jenkins to 2.3 restores the right behavior : job run is ok.