fixup! fix: avoid resources lock contention utilizing channel

resolve PR's comments: https://github.com/argoproj/gitops-engine/pull/629\#pullrequestreview-2425207583

Author: mpelekh

pkg/cache/cluster.go

@@ -1300,7 +1300,7 @@ func (c *clusterCache) recordEvent(event watch.EventType, un *unstructured.Unstr
 }
 
 func (c *clusterCache) processEvents() {
-	log := c.log.WithValues("fn", "processItems")
+	log := c.log.WithValues("functionName", "processItems")
 	log.V(1).Info("Start processing events")
 
 	c.lock.Lock()
@@ -1313,12 +1313,12 @@ func (c *clusterCache) processEvents() {
 
 	for {
 		select {
-		case em, ok := <-ch:
+		case evMeta, ok := <-ch:
 			if !ok {
-				log.V(1).Info("Event processing channel closed, finish processing")
+				log.V(2).Info("Event processing channel closed, finish processing")
 				return
 			}
-			eventMetas = append(eventMetas, em)
+			eventMetas = append(eventMetas, evMeta)
 		case <-ticker.C:
 			if len(eventMetas) > 0 {
 				c.processEventsBatch(eventMetas)
@@ -1329,7 +1329,7 @@ func (c *clusterCache) processEvents() {
 }
 
 func (c *clusterCache) processEventsBatch(eventMetas []eventMeta) {
-	log := c.log.WithValues("fn", "processEventsBatch")
+	log := c.log.WithValues("functionName", "processEventsBatch")
 	start := time.Now()
 	c.lock.Lock()
 	log.V(1).Info("Lock acquired (ms)", "duration", time.Since(start).Milliseconds())