madmin.HealOpts{
						ScanMode: scanMode,
						Remove:   healDeleteDangling,
					})
				if err != nil {
					if isErrObjectNotFound(err) || isErrVersionNotFound(err) {
						// queueing happens across namespace, ignore
						// objects that are not found.
						return
					}
					result = healEntryFailure(0)
					bgSeq.countFailed(madmin.HealItemObject)

    //    second thread can then dispatch to the subscriber it took before the first thread does.
    //
    // All this makes me really wonder if there's any value in queueing here at all. A dispatcher
    // that simply loops through the subscribers and dispatches the event to each would actually
    // probably provide a stronger order guarantee, though that order would obviously be different

 *
 * <p>Key features include:</p>
 * <ul>
 * <li>Incremental crawling support with last-modified timestamp checking</li>
 * <li>Document expiration handling</li>
 * <li>Child URL extraction and queueing</li>
 * <li>Integration with Fess configuration and permission systems</li>
 * <li>Client selection based on URL patterns</li>
 * </ul>
 *
 * @see CrawlerThread
 * @see org.codelibs.fess.crawler.client.CrawlerClient

- In a scheduler with `Permit` plugins, when a Pod is rejected during `WaitOnPermit`, the scheduler records the plugin.
  The scheduler will use the record to honor cluster events and queueing `hints registered` for the plugin, to inform whether to retry the pod. ([#119785](https://github.com/kubernetes/kubernetes/pull/119785), [@sanposhiho](https://github.com/sanposhiho))

- Improve Node QueueHint in the NodeAffinty plugin by ignoring unrelated changes that keep pods unschedulable. ([#127444](https://github.com/kubernetes/kubernetes/pull/127444), [@dom4ha](https://github.com/dom4ha)) [SIG Scheduling and Testing]

      queue.add(submittedTask);
      workerRunningState = QUEUING;
    }

    try {
      executor.execute(worker);
    } catch (Throwable t) {
      // Any Exception is either a RuntimeException or sneaky checked exception.
      synchronized (queue) {
        boolean removed =
            (workerRunningState == IDLE || workerRunningState == QUEUING)
                && queue.removeLastOccurrence(submittedTask);

      queue.add(submittedTask);
      workerRunningState = QUEUING;
    }

    try {
      executor.execute(worker);
    } catch (Throwable t) {
      // Any Exception is either a RuntimeException or sneaky checked exception.
      synchronized (queue) {
        boolean removed =
            (workerRunningState == IDLE || workerRunningState == QUEUING)
                && queue.removeLastOccurrence(submittedTask);

		return
	}
	// Single calls do not support pinging.
	if v, ok := c.inStream.Load(m.MuxID); ok {
		pong := v.ping(m.Seq)
		pong.T = ping.T
		gridLogIf(ctx, c.queueMsg(m, &pong))
	} else {
		pong := pongMsg{NotFound: true, T: ping.T}
		gridLogIf(ctx, c.queueMsg(m, &pong))
	}
}

func (c *Connection) handleDisconnectClientMux(m message) {

- Correct event registration for multiple scheduler plugins; this fixes a potential significant delay in re-queueing unschedulable pods. ([#109442](https://github.com/kubernetes/kubernetes/pull/109442), [@ahg-g](https://github.com/ahg-g))

 * </ul>
 *
 * <p>Public Methods:
 * <ul>
 *   <li>{@link #suggest()}: Creates a new SuggestRequestBuilder for querying suggestions.</li>
 *   <li>{@link #popularWords()}: Creates a new PopularWordsRequestBuilder for querying popular words.</li>
 *   <li>{@link #refresh()}: Refreshes the suggestion indices.</li>
 *   <li>{@link #shutdown()}: Shuts down the thread pool.</li>