lock(&work.wbufSpans.lock)
	if work.full != 0 {
		throw("cannot free workbufs when work.full != 0")
	}
	// Since all workbufs are on the empty list, we don't care
	// which ones are in which spans. We can wipe the entire empty
	// list and move all workbuf spans to the free list.
	work.empty = 0
	work.wbufSpans.free.takeAll(&work.wbufSpans.busy)
	unlock(&work.wbufSpans.lock)
}

	// but we would still want those policies evaluated
	// (for instance to return error on failaction). Or if there was an error
	// listing all policies at all, we would want to wipe the list.
	s.policies.Store(&policies)

	if err != nil {
		// An error was generated while syncing policies. Mark it as dirty again
		// so we can retry later

		}
		if cond.ObservedGeneration != gwc.Generation {
			return fmt.Errorf("stale GWC generation: %+v", cond)
		}
		return nil
	}
	retry.UntilSuccessOrFail(t, check)

	// Wipe out the status
	gwc, _ := client.Get(context.Background(), "istio", metav1.GetOptions{})
	gwc.Status.Conditions = nil
	client.Update(context.Background(), gwc, metav1.UpdateOptions{})
	// It should be added back

		applyRoundRobinLoadBalancer(c, lb)
	case networking.LoadBalancerSettings_PASSTHROUGH:
		c.LbPolicy = cluster.Cluster_CLUSTER_PROVIDED
		c.ClusterDiscoveryType = &cluster.Cluster_Type{Type: cluster.Cluster_ORIGINAL_DST}
		// Wipe out any LoadAssignment, if set. This can occur when we have a STATIC Service but PASSTHROUGH traffic policy
		c.LoadAssignment = nil
	default:
		applySimpleDefaultLoadBalancer(c, lb)
	}

			// Ideally, if the weighted cluster overwrites authority, it has precedence. This mirrors behavior of headers,
			// because for headers we append the weighted last which allows it to Set and wipe out previous Adds.
			// However, Envoy behavior is different when we set at both cluster level and route level, and we want
			// behavior to be consistent with a single cluster and multiple clusters.

	if node == nil || !ok {
		return
	}
	nodeName := types.NodeName(node.Name)
	adc.nodeUpdate(logger, nil, obj)
	// kubernetes/kubernetes/issues/37586
	// This is to workaround the case when a node add causes to wipe out
	// the attached volumes field. This function ensures that we sync with
	// the actual status.
	adc.actualStateOfWorld.SetNodeStatusUpdateNeeded(logger, nodeName)
}

	masked := initialDocument.DeepCopy()
	masked.Items[0].Versions[0].Freshness = apidiscoveryv2.DiscoveryFreshnessStale

	require.Equal(t, masked.Items, maskedDocument.Items)

	// Wipe out default group. The other versions from the other group should now
	// appear since the group is not being overridden by defaults ource
	defaultManager.RemoveGroup(apis.Items[0].Name)

		t.Fatal("Incremental push failed", err)
	}
	if !reflect.DeepEqual(upd, []string{v3.EndpointType}) {
		t.Fatal("Expecting EDS only update, got", upd)
	}
	testTCPEndpoints("127.0.0.5", adsc, t)

	// Wipe out all endpoints - expect full
	s.MemRegistry.SetEndpoints(edsIncSvc, "", []*model.IstioEndpoint{})

	if upd, err := adsc.Wait(15*time.Second, v3.EndpointType); err != nil {

			// Ideally, if the weighted cluster overwrites authority, it has precedence. This mirrors behavior of headers,
			// because for headers we append the weighted last which allows it to Set and wipe out previous Adds.
			// However, Envoy behavior is different when we set at both cluster level and route level, and we want
			// behavior to be consistent with a single cluster and multiple clusters.

- Setting the `status.loadBalancer` of a Service whose `spec.type` is not `LoadBalancer` was previously allowed, but any update to the `metadata` or `spec` would wipe that field. Setting this field is no longer permitted unless `spec.type` is  `LoadBalancer`.  In the very unlikely event that this has unexpected impact, you can enable the `AllowServiceLBStatusOnNonLB` feature gate, which will restore the previous...