Merge pull request #17003 from jiangyaoguo/fix-error-sync-pod-message

pkg/kubelet/dockertools/manager.go

@@ -1955,7 +1955,7 @@ func (dm *DockerManager) SyncPod(pod *api.Pod, runningPod kubecontainer.Pod, pod
 	}
 
 	if containersStarted != len(containerChanges.ContainersToStart) {
-		return fmt.Errorf("not all containers have started: %d != %d", containersStarted, containerChanges.ContainersToStart)
+		return fmt.Errorf("not all containers have started: %d != %d", containersStarted, len(containerChanges.ContainersToStart))
 	}
 	return nil
 }