add debug log

Signed-off-by: lhy1024 <[email protected]>

pkg/utils/etcdutil/etcdutil.go

@@ -711,9 +711,12 @@ func (lw *LoopWatcher) watch(ctx context.Context, revision int64) (nextRevision
 		case <-ctx.Done():
 			return revision, nil
 		case <-ticker.C:
+			log.Info("request progress in watch loop")
+			ctx, cancel := context.WithTimeout(ctx, DefaultRequestTimeout)
 			if err := watcher.RequestProgress(ctx); err != nil {
 				log.Warn("failed to request progress in watch loop", zap.Error(err))
 			}
+			cancel()
 			if time.Since(lastReceivedResponseTime) >= WatchChTimeoutDuration {
 				// If no msg comes from an etcd watchChan for WatchChTimeoutDuration long,
 				// we should cancel the watchChan and request a new watchChan from watcher.
@@ -727,6 +730,7 @@ func (lw *LoopWatcher) watch(ctx context.Context, revision int64) (nextRevision
 			}
 			continue
 		case wresp := <-watchChan:
+			log.Info("receive request in watch loop")
 			lastReceivedResponseTime = time.Now()
 			if wresp.CompactRevision != 0 {
 				log.Warn("required revision has been compacted, use the compact revision in watch loop",