Merge pull request #583 from Riliane/flowdurabilitytest-flake

Accept run not loading at all as a kind of run failure in testDurableAgainstCleanRestartFailsWithDirtyShutdown

Author: dwnusbaum

src/test/java/org/jenkinsci/plugins/workflow/cps/FlowDurabilityTest.java

@@ -585,6 +585,7 @@ public void evaluate() throws Throwable {
             @Override
             public void evaluate() throws Throwable {
                 WorkflowRun run = story.j.jenkins.getItemByFullName("durableAgainstClean", WorkflowJob.class).getLastBuild();
+                if (run == null) { return; } //there is a small chance due to non atomic write that build.xml will be empty and the run won't load at all
                 verifyFailedCleanly(story.j.jenkins, run);
                 story.j.assertLogContains(logStart[0], run);
             }
@@ -616,6 +617,7 @@ public void evaluate() throws Throwable {
             @Override
             public void evaluate() throws Throwable {
                 WorkflowRun run = story.j.jenkins.getItemByFullName("durableAgainstClean", WorkflowJob.class).getLastBuild();
+                if (run == null) { return; } //there is a small chance due to non atomic write that build.xml will be empty and the run won't load at all
                 verifyFailedCleanly(story.j.jenkins, run);
                 story.j.assertLogContains(logStart[0], run);
             }