From 7179c766aae11bc7bfc3f8993c9b6db0a11ef9ea Mon Sep 17 00:00:00 2001
From: derailed <fernand.galiana@gmail.com>
Date: Fri, 6 Nov 2020 14:39:01 -0700
Subject: [PATCH] cleaning up

---
 internal/model/cluster.go | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/internal/model/cluster.go b/internal/model/cluster.go
index 62ef053f..363c3232 100644
--- a/internal/model/cluster.go
+++ b/internal/model/cluster.go
@@ -2,6 +2,7 @@ package model
 
 import (
 	"context"
+	"errors"
 	"time"
 
 	"github.com/derailed/k9s/internal/client"
@@ -91,16 +92,21 @@ func (c *Cluster) UserName() string {
 // Metrics gathers node level metrics and compute utilization percentages.
 func (c *Cluster) Metrics(ctx context.Context, mx *client.ClusterMetrics) error {
 	var (
-		nn *v1.NodeList
+		nn  *v1.NodeList
 		err error
 	)
 	if v, ok := c.cache.Get(clusterNodesKey); ok {
-		nn = v.(*v1.NodeList)
+		if nl, ok := v.(*v1.NodeList); ok {
+			nn = nl
+		}
 	} else {
 		if nn, err = dao.FetchNodes(ctx, c.factory, ""); err != nil {
 			return err
 		}
 	}
+	if nn == nil {
+		return errors.New("Unable to fetch nodes list")
+	}
 	if len(nn.Items) > 0 {
 		c.cache.Add(clusterNodesKey, nn, clusterCacheExpiry)
 	}