We have a few jobs were multiple unit tests reports are created for each job run, and it looks like XUnit is trying to create 'generatedJUnitFiles/$Tool' for each test report, but w/o previouslly checking if directory already exists... and thus it fails on the second pass with the following exception:

[xUnit] [ERROR] - Can't create /srv/jenkins/workspace/SomeProj-v1.x/generatedJUnitFiles/Gallio
ERROR: Publisher org.jenkinsci.plugins.xunit.XUnitPublisher aborted due to exception
java.io.IOException: remote file operation failed: /srv/jenkins/workspace/SomeProj-v1.x at hudson.remoting.Channel@403729c5:Barney-CentOS-5.x
at hudson.FilePath.act(FilePath.java:910)
at hudson.FilePath.act(FilePath.java:887)
at org.jenkinsci.plugins.xunit.XUnitProcessor.performTests(XUnitProcessor.java:112)
at org.jenkinsci.plugins.xunit.XUnitProcessor.performXUnit(XUnitProcessor.java:55)
at org.jenkinsci.plugins.xunit.XUnitPublisher.perform(XUnitPublisher.java:75)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:785)
at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:757)
at hudson.model.Build$BuildExecution.post2(Build.java:183)
at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:706)
at hudson.model.Run.execute(Run.java:1703)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:231)
Caused by: hudson.util.IOException2: There are some problems during the conversion into JUnit reports:
at org.jenkinsci.plugins.xunit.service.XUnitTransformer.invoke(XUnitTransformer.java:153)
at org.jenkinsci.plugins.xunit.service.XUnitTransformer.invoke(XUnitTransformer.java:16)
at hudson.FilePath$FileCallableWrapper.call(FilePath.java:2461)
at hudson.remoting.UserRequest.perform(UserRequest.java:118)
at hudson.remoting.UserRequest.perform(UserRequest.java:48)
at hudson.remoting.Request$2.run(Request.java:328)
at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:679)
Caused by: org.jenkinsci.plugins.xunit.exception.XUnitException: Can't create /srv/jenkins/workspace/SomeProj-v1.x/generatedJUnitFiles/Gallio
at org.jenkinsci.plugins.xunit.service.XUnitConversionService.convert(XUnitConversionService.java:47)
at org.jenkinsci.plugins.xunit.service.XUnitTransformer.invoke(XUnitTransformer.java:121)
... 11 more