Merge pull request #669 from dwnusbaum/flush-log-on-shutdown

Flush overall Pipeline log stream when shutting down Jenkins

Author: dwnusbaum

plugin/src/main/java/org/jenkinsci/plugins/workflow/cps/CpsFlowExecution.java

@@ -1720,6 +1720,7 @@ public void pause(final boolean v) throws IOException {
                                 LOGGER.log(Level.WARNING, null, t);
                             }
                         });
+                        cpsExec.getOwner().getListener().getLogger().close();
                     }
                 } catch (Exception ex) {
                     LOGGER.log(Level.WARNING, "Error persisting Pipeline execution at shutdown: "+((CpsFlowExecution) execution).owner, ex);

plugin/src/test/java/org/jenkinsci/plugins/workflow/cps/CpsFlowDefinitionRJRTest.java

@@ -1,6 +1,10 @@
 package org.jenkinsci.plugins.workflow.cps;
 
+import hudson.Functions;
+import java.util.logging.Level;
 import org.jenkinsci.plugins.workflow.job.WorkflowJob;
+import org.jenkinsci.plugins.workflow.job.WorkflowRun;
+import org.junit.Assume;
 import org.junit.Rule;
 import org.junit.Test;
 import org.jvnet.hudson.test.JenkinsRule;
@@ -21,4 +25,28 @@ private static void doesItSmoke(JenkinsRule r) throws Exception {
         p.setDefinition(new CpsFlowDefinition("print Jenkins.get().getRootDir().toString()", false));
         r.assertBuildStatusSuccess(p.scheduleBuild2(0));
     }
+
+    @Test
+    public void flushLogsOnShutdown() throws Throwable {
+        Assume.assumeFalse("RealJenkinsRule does not shut down Jenkins cleanly on Windows, see https://github.com/jenkinsci/jenkins-test-harness/pull/559", Functions.isWindows());
+        rjr.withLogger(CpsFlowExecution.class, Level.FINER);
+        rjr.then(CpsFlowDefinitionRJRTest::flushLogsOnShutdownPreRestart);
+        rjr.then(CpsFlowDefinitionRJRTest::flushLogsOnShutdownPostRestart);
+    }
+
+    private static void flushLogsOnShutdownPreRestart(JenkinsRule r) throws Exception {
+        WorkflowJob p = r.createProject(WorkflowJob.class, "p");
+        p.setDefinition(new CpsFlowDefinition("sleep 10\n", true));
+        WorkflowRun b = p.scheduleBuild2(0).waitForStart();
+        r.waitForMessage("Sleeping for 10 sec", b);
+        r.jenkins.doQuietDown();
+    }
+
+    private static void flushLogsOnShutdownPostRestart(JenkinsRule r) throws Exception {
+        WorkflowJob p = r.jenkins.getItemByFullName("p", WorkflowJob.class);
+        WorkflowRun b = p.getLastBuild();
+        r.assertBuildStatusSuccess(r.waitForCompletion(b));
+        r.assertLogContains("Resuming build at ", b);
+        r.assertLogContains("Pausing (Preparing for shutdown)", b);
+    }
 }