Queue constantly locked when rapidly scheduling builds

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      If there is a job that gets very rapidly scheduled, since a Run.id currently must be unique to the second, a lot of the time the Queue will be locked:

      ... waiting on condition [...]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
    at java.lang.Thread.sleep(Native Method)
    at hudson.model.AbstractProject.newBuild(AbstractProject.java:1121)
    - locked <...> (a hudson.model.FreeStyleProject)
    at hudson.model.AbstractProject.createExecutable(AbstractProject.java:1349)
    at hudson.model.AbstractProject.createExecutable(AbstractProject.java:156)
    at hudson.model.Executor.run(Executor.java:211)
    - locked <...> (a hudson.model.Queue)

      which can prevent other things from happening, such as routine queue maintenance, or even rendering of the queue widget (which expects a fresh snapshot every second):

      "Handling ..." ... waiting for monitor entry [...]
   java.lang.Thread.State: BLOCKED (on object monitor)
    at hudson.model.Queue.getItems(Queue.java:685)
    - waiting to lock <...> (a hudson.model.Queue)
    at hudson.model.Queue$CachedItemList.get(Queue.java:217)
    at hudson.model.Queue.getApproximateItemsQuickly(Queue.java:715)
    at hudson.model.View.getApproximateQueueItemsQuickly(View.java:483)

      (This also artificially slows down some functional tests.)

            Assignee:
            Jesse Glick
            Reporter:
            Jesse Glick
            Archiver:
            Jenkins Service Account

              Created:
              Updated:
              Resolved:
              Archived: