[YARN-6741] Deleting all children of a Parent Queue on refresh throws exception

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha3
• Fix Version/s: 2.9.0, 3.0.0-beta1
• Component/s: capacity scheduler
• Target Version/s: 3.0.0-beta1
• Hadoop Flags: Reviewed
• Assignee: Naganarasimha G R
• Reporter: Naganarasimha G R
• Created: 25/Jun/17 12:44
• Updated: 16/Aug/17 09:27
• Resolved: 16/Aug/17 09:27

Description

If we configure CS such that all children of a parent queue are deleted and made as a leaf queue, then refreshQueue operation fails when re-initializing the parent Queue

       // Sanity check
      if (!(newlyParsedQueue instanceof ParentQueue) || !newlyParsedQueue
          .getQueuePath().equals(getQueuePath())) {
        throw new IOException(
            "Trying to reinitialize " + getQueuePath() + " from "
                + newlyParsedQueue.getQueuePath());
      }

Expected Behavior:
Converting a Parent Queue to leafQueue on refreshQueue needs to be supported.

Issue Links

• is broken by: YARN-5556 CapacityScheduler: Support deleting queues without requiring a RM restart