We use a declarative pipeline to wipe out all slaves workspaces (attached here - Jenkinsfile)
It generally does some processing and attempts to delete the workspace like this:

FilePath fp = node.getRootPath().child("workspace");
fp.deleteRecursive();

It starts working well and fails with InterruptedException at some point:

Started by timer
Lightweight checkout support not available, falling back to full checkout.
Checking out svn http://svndae.apama.com/um/branches/dev/jenkins2_2/build/change-management/jenkinsfiles/wipeout_slave_workspace into /FS/fslocal/jenkinsWorkspace/jobs/admin_wipeout_workspaces/workspace@script to read Jenkinsfile
Updating http://svndae.apama.com/um/branches/dev/jenkins2_2/build/change-management/jenkinsfiles/wipeout_slave_workspace at revision '2018-09-19T01:47:00.338 +0200' --quiet
At revision 112786

No changes for http://svndae.apama.com/um/branches/dev/jenkins2_2/build/change-management/jenkinsfiles/wipeout_slave_workspace since the previous build
Running in Durability level: MAX_SURVIVABILITY
Loading library templates@branches/dev/jenkins2_2/build/change-management/jenkinsfiles/templates
Opening connection to http://svndae.apama.com/um/
Updating http://svndae.apama.com/um/branches/dev/jenkins2_2/build/change-management/jenkinsfiles/templates@112786 at revision 112786
At revision 112786

No changes for http://svndae.apama.com/um/branches/dev/jenkins2_2/build/change-management/jenkinsfiles/templates since the previous build
[Pipeline] node
Running on Jenkins in /FS/fslocal/jenkinsWorkspace/jobs/admin_wipeout_workspaces/workspace
[Pipeline] {
[Pipeline] stage
[Pipeline]

{ (Declarative: Checkout SCM) [Pipeline] checkout Updating http://svndae.apama.com/um/branches/dev/jenkins2_2/build/change-management/jenkinsfiles/wipeout_slave_workspace at revision '2018-09-19T01:47:00.338 +0200' --quiet At revision 112786 No changes for http://svndae.apama.com/um/branches/dev/jenkins2_2/build/change-management/jenkinsfiles/wipeout_slave_workspace since the previous build [Pipeline] }

[Pipeline] // stage
[Pipeline] withEnv
[Pipeline] {
[Pipeline] stage
[Pipeline] { (Wipe Out Slave Workspaces)
[Pipeline] script
[Pipeline]

{ [Pipeline] echo Processing: daeosx109v04.eur.ad.sag [Pipeline] echo Wiping out: /Users/nirdevadm/workspace/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: daeosx109v05.eur.ad.sag [Pipeline] echo Wiping out: /Users/nirdevadm/jenkinsWorkspace/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: daeosx109v11.eur.ad.sag [Pipeline] echo Wiping out: /Users/nirdevadm/workspace/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: sofum01.eur.ad.sag [Pipeline] echo Wiping out: /home/nirdevadm/jenkins/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: umlinuxbuild10.eur.ad.sag [Pipeline] echo Wiping out: /FS/fslocal/jenkins_slave/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: umlinuxbuild11.eur.ad.sag [Pipeline] echo Wiping out: /FS/fslocal/jenkins_slave/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: umlinuxbuild12.eur.ad.sag [Pipeline] echo Wiping out: /FS/fslocal/jenkins_slave/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: umlinuxbuild13.eur.ad.sag [Pipeline] echo Wiping out: /FS/fslocal/jenkins_slave/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: umlinuxbuild14.eur.ad.sag [Pipeline] echo Wiping out: /FS/fslocal/jenkins_slave/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: umlinuxbuild15.eur.ad.sag [Pipeline] echo Wiping out: /FS/fslocal/jenkins_slave/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: umlinuxqa18.eur.ad.sag [Pipeline] echo Wiping out: /FS/fslocal/jenkins_slave/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: umlinuxqa19.eur.ad.sag [Pipeline] echo Wiping out: /FS/fslocal/jenkins_slave/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: umlinuxqa20.eur.ad.sag [Pipeline] echo Wiping out: /FS/fslocal/jenkins_slave/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: umlinuxqa21.eur.ad.sag [Pipeline] echo Wiping out: /FS/fslocal/jenkins_slave/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: umlinuxqa22.eur.ad.sag [Pipeline] echo Wiping out: /FS/fslocal/jenkins_slave/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: umlinuxqa23.eur.ad.sag [Pipeline] echo Wiping out: /FS/fslocal/jenkins_slave/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: umlinuxqa24.eur.ad.sag [Pipeline] echo Wiping out: /FS/fslocal/jenkins_slave/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: umlinuxqa25.eur.ad.sag [Pipeline] echo Wiping out: /FS/fslocal/jenkins_slave/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: umsuse03.eur.ad.sag [Pipeline] echo Wiping out: /FS/fslocal/jenkins/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: umsuse04.eur.ad.sag [Pipeline] echo Wiping out: /FS/fslocal/jenkins/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: umsuse05.eur.ad.sag [Pipeline] echo Wiping out: /FS/fslocal/jenkins/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: umsuse06.eur.ad.sag [Pipeline] echo Wiping out: /FS/fslocal/jenkins/workspace [Pipeline] echo ------------------ [Pipeline] echo Processing: umwindowstest01.eur.ad.sag [Pipeline] echo Wiping out: c:\users\nirdevadm\jenkins\workspace [Pipeline] echo ------------------ [Pipeline] }

[Pipeline] // script
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // withEnv
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at hudson.remoting.Request.call(Request.java:177)
at hudson.remoting.Channel.call(Channel.java:954)
at hudson.FilePath.act(FilePath.java:1070)
at hudson.FilePath.act(FilePath.java:1059)
at hudson.FilePath.deleteRecursive(FilePath.java:1266)
at sun.reflect.GeneratedMethodAccessor2361.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1213)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1022)
at org.codehaus.groovy.runtime.callsite.PojoMetaClassSite.call(PojoMetaClassSite.java:47)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:157)
at org.kohsuke.groovy.sandbox.GroovyInterceptor.onMethodCall(GroovyInterceptor.java:23)
at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onMethodCall(SandboxInterceptor.java:133)
at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:155)
at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:159)
at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.methodCall(SandboxInvoker.java:17)
at WorkflowScript.run(WorkflowScript:32)
at __cps.transform__(Native Method)
at com.cloudbees.groovy.cps.impl.ContinuationGroup.methodCall(ContinuationGroup.java:57)
at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.dispatchOrArg(FunctionCallBlock.java:109)
at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.fixName(FunctionCallBlock.java:77)
at sun.reflect.GeneratedMethodAccessor416.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)
at com.cloudbees.groovy.cps.impl.ConstantBlock.eval(ConstantBlock.java:21)
at com.cloudbees.groovy.cps.Next.step(Next.java:83)
at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:174)
at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:163)
at org.codehaus.groovy.runtime.GroovyCategorySupport$ThreadCategoryInfo.use(GroovyCategorySupport.java:122)
at org.codehaus.groovy.runtime.GroovyCategorySupport.use(GroovyCategorySupport.java:261)
at com.cloudbees.groovy.cps.Continuable.run0(Continuable.java:163)
at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.access$101(SandboxContinuable.java:34)
at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.lambda$run0$0(SandboxContinuable.java:59)
at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.GroovySandbox.runInSandbox(GroovySandbox.java:108)
at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.run0(SandboxContinuable.java:58)
at org.jenkinsci.plugins.workflow.cps.CpsThread.runNextChunk(CpsThread.java:174)
at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:332)
at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$200(CpsThreadGroup.java:83)
at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:244)
at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:232)
at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:64)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:131)
at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Finished: FAILURE