[JIRA] [workflow-plugin] (JENKINS-27969) parallel([:]) hangs forever

Wed, 15 Apr 2015 23:29:53 -0700

Issue Type: Bug Bug
Assignee: Jesse Glick
Components: workflow-plugin
Created: 16/Apr/15 6:28 AM
Description:

Hi,

The following workflow will just hang forever:

node {
  parallel([:])
}

Log:

Started by user anonymous
Running: Allocate node : Start
Running on master in /home/ehencae/src/workflow-plugin/aggregator/work/jobs/test1/workspace@2
Running: Allocate node : Body : Start
Running: Execute sub-workflows in parallel : Start
Aborted by anonymous
Aborted by anonymous
Aborted by anonymous
Resuming build



After that it is not possible to abort it, not even by restart. The workaround in JENKINS-25550 did the trick. Parallel should not just hang when executed with a empty map. Even though it's easy to workaround in the flow so that it isn't called for empty maps.





Possible to recreate in:


org.jenkinsci.plugins.workflow.steps.parallel.ParallelStepTest


@Test
    public void parallelEmptyMap() {
        story.addStep(new Statement() {
            @Override public void evaluate() throws Throwable {
                p = jenkins().createProject(WorkflowJob.class, "demo");
                p.setDefinition(new CpsFlowDefinition(join(
                        "node {\n" +
                                "    parallel([:])\n" +
                                "}\n"
                )));

                startBuilding().get();
                assertBuildCompletedSuccessfully();
            }
        });
    }





Log:




...
=== Starting parallelEmptyMap(org.jenkinsci.plugins.workflow.steps.parallel.ParallelStepTest)
[demo #1] Started
[demo #1] Running: Allocate node : Start
[demo #1] Running on master in /tmp/junit1594929993299071723/junit5524096835654718071/workspace/demo
[demo #1] Running: Allocate node : Body : Start
[demo #1] Running: Execute sub-workflows in parallel : Start
Project: Jenkins
Priority: Minor Minor
Reporter: Henrik Caesar
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