fix cluster event queue processing

pkg/controller/postgresql.go

@@ -55,12 +55,12 @@ func (c *Controller) clusterListFunc(options metav1.ListOptions) (runtime.Object
 		return &list, err
 	}
 
-	for _, pg := range list.Items {
+	for i, pg := range list.Items {
 		if pg.Error != nil {
 			failedClustersCnt++
 			continue
 		}
-		c.queueClusterEvent(nil, &pg, spec.EventSync)
+		c.queueClusterEvent(nil, &list.Items[i], spec.EventSync)
 		activeClustersCnt++
 	}
 	if len(list.Items) > 0 {
@@ -232,13 +232,19 @@ func (c *Controller) processClusterEventsQueue(idx int, stopCh <-chan struct{},
 	defer wg.Done()
 
 	go func() {
-		if _, err := c.clusterEventQueues[idx].Pop(cache.PopProcessFunc(c.processEvent)); err != nil {
-			c.logger.Errorf("error when processing cluster events queue: %v", err)
-		}
-	}()
-
 		<-stopCh
 		c.clusterEventQueues[idx].Close()
+	}()
+
+	for {
+		if _, err := c.clusterEventQueues[idx].Pop(cache.PopProcessFunc(c.processEvent)); err != nil {
+			if err == cache.FIFOClosedError {
+				return
+			}
+
+			c.logger.Errorf("error when processing cluster events queue: %v", err)
+		}
+	}
 }
 
 func (c *Controller) queueClusterEvent(old, new *spec.Postgresql, eventType spec.EventType) {