<p>I recently upgraded my ingress controller to <a href="https://github.com/nginxinc/kubernetes-ingress/releases/tag/v1.10.0" rel="nofollow noreferrer">kubernetes-ingress  v1.10.0</a>. The ingresses seem to route traffic correctly but after checking the pods logs, I noticed a huge amount of notice were generated:</p>
<pre><code>2021/02/10 09:40:23 [notice] 19#19: signal 17 (SIGCHLD) received from 2748
2021/02/10 09:40:23 [notice] 19#19: worker process 2748 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: signal 29 (SIGIO) received
2021/02/10 09:40:23 [notice] 19#19: signal 17 (SIGCHLD) received from 2745
2021/02/10 09:40:23 [notice] 19#19: worker process 2745 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: signal 29 (SIGIO) received
W0210 09:40:23.416499       1 listers.go:79] can not retrieve list of objects using index : Index with name namespace does not exist
W0210 09:40:23.416812       1 listers.go:79] can not retrieve list of objects using index : Index with name namespace does not exist
W0210 09:40:23.416912       1 listers.go:79] can not retrieve list of objects using index : Index with name namespace does not exist
2021/02/10 09:40:23 [notice] 19#19: signal 17 (SIGCHLD) received from 2735
2021/02/10 09:40:23 [notice] 19#19: worker process 2735 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: signal 29 (SIGIO) received
2021/02/10 09:40:23 [notice] 19#19: signal 17 (SIGCHLD) received from 2737
2021/02/10 09:40:23 [notice] 19#19: worker process 2737 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: worker process 2742 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: signal 29 (SIGIO) received
2021/02/10 09:40:23 [notice] 19#19: signal 17 (SIGCHLD) received from 2746
2021/02/10 09:40:23 [notice] 19#19: worker process 2746 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: signal 29 (SIGIO) received
2021/02/10 09:40:23 [notice] 19#19: signal 17 (SIGCHLD) received from 2744
2021/02/10 09:40:23 [notice] 19#19: worker process 2744 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: signal 29 (SIGIO) received
2021/02/10 09:40:23 [notice] 19#19: signal 17 (SIGCHLD) received from 2740
2021/02/10 09:40:23 [notice] 19#19: worker process 2740 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: signal 29 (SIGIO) received
2021/02/10 09:40:23 [notice] 19#19: signal 17 (SIGCHLD) received from 2736
2021/02/10 09:40:23 [notice] 19#19: worker process 2736 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: signal 29 (SIGIO) received
2021/02/10 09:40:23 [notice] 19#19: signal 17 (SIGCHLD) received from 2741
2021/02/10 09:40:23 [notice] 19#19: worker process 2734 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: worker process 2741 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: signal 29 (SIGIO) received
2021/02/10 09:40:23 [notice] 19#19: signal 17 (SIGCHLD) received from 2739
2021/02/10 09:40:23 [notice] 19#19: worker process 2739 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: signal 29 (SIGIO) received
2021/02/10 09:40:23 [notice] 19#19: signal 17 (SIGCHLD) received from 2738
2021/02/10 09:40:23 [notice] 19#19: worker process 2738 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: signal 29 (SIGIO) received
2021/02/10 09:40:23 [notice] 19#19: signal 17 (SIGCHLD) received from 2743
2021/02/10 09:40:23 [notice] 19#19: worker process 2743 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: signal 29 (SIGIO) received
2021/02/10 09:40:23 [notice] 19#19: signal 17 (SIGCHLD) received from 2749
2021/02/10 09:40:23 [notice] 19#19: worker process 2749 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: signal 29 (SIGIO) received
2021/02/10 09:40:23 [notice] 19#19: signal 17 (SIGCHLD) received from 2747
2021/02/10 09:40:23 [notice] 19#19: worker process 2747 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: signal 29 (SIGIO) received
2021/02/10 09:40:23 [warn] 2718#2718: *6697105 an upstream response is buffered to a temporary file /var/cache/nginx/proxy_temp/6/79/0000214796 while reading upstream, client: xxxx, server: xxxx, request: &quot;GET /xxxx HTTP/1.1&quot;, upstream: &quot;xxxx&quot;, host: &quot;xxxx&quot;, referrer: &quot;xxxx&quot;
2021/02/10 09:40:23 [notice] 2769#2769: signal process started
2021/02/10 09:40:23 [notice] 19#19: signal 1 (SIGHUP) received from 2769, reconfiguring
2021/02/10 09:40:23 [notice] 19#19: reconfiguring
2021/02/10 09:40:23 [notice] 19#19: using the &quot;epoll&quot; event method
2021/02/10 09:40:23 [notice] 19#19: start worker processes
2021/02/10 09:40:23 [notice] 19#19: start worker process 2770
2021/02/10 09:40:23 [notice] 19#19: start worker process 2771
2021/02/10 09:40:23 [notice] 19#19: start worker process 2772
2021/02/10 09:40:23 [notice] 19#19: start worker process 2773
2021/02/10 09:40:23 [notice] 19#19: start worker process 2774
2021/02/10 09:40:23 [notice] 19#19: start worker process 2775
2021/02/10 09:40:23 [notice] 19#19: start worker process 2776
2021/02/10 09:40:23 [notice] 19#19: start worker process 2777
2021/02/10 09:40:23 [notice] 19#19: start worker process 2778
2021/02/10 09:40:23 [notice] 19#19: start worker process 2779
2021/02/10 09:40:23 [notice] 19#19: start worker process 2780
2021/02/10 09:40:23 [notice] 19#19: start worker process 2781
2021/02/10 09:40:23 [notice] 19#19: start worker process 2782
2021/02/10 09:40:23 [notice] 19#19: start worker process 2783
2021/02/10 09:40:23 [notice] 19#19: start worker process 2784
2021/02/10 09:40:23 [notice] 19#19: start worker process 2785
90.114.22.230 - - [10/Feb/2021:09:40:23 +0000] &quot;GET /xxxx HTTP/1.1&quot; 200 352910 &quot;xxxx&quot; &quot;Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:84.0) Gecko/20100101 Firefox/84.0&quot; &quot;-&quot;
2021/02/10 09:40:23 [notice] 2753#2753: gracefully shutting down
2021/02/10 09:40:23 [notice] 2755#2755: gracefully shutting down
2021/02/10 09:40:23 [notice] 2760#2760: gracefully shutting down
2021/02/10 09:40:23 [notice] 2755#2755: exiting
2021/02/10 09:40:23 [notice] 2753#2753: exiting
2021/02/10 09:40:23 [notice] 2762#2762: gracefully shutting down
2021/02/10 09:40:23 [notice] 2760#2760: exiting
2021/02/10 09:40:23 [notice] 2766#2766: gracefully shutting down
2021/02/10 09:40:23 [notice] 2762#2762: exiting
2021/02/10 09:40:23 [notice] 2766#2766: exiting
2021/02/10 09:40:23 [notice] 2759#2759: gracefully shutting down
2021/02/10 09:40:23 [notice] 2759#2759: exiting
2021/02/10 09:40:23 [notice] 2763#2763: gracefully shutting down
2021/02/10 09:40:23 [notice] 2761#2761: gracefully shutting down
2021/02/10 09:40:23 [notice] 2767#2767: gracefully shutting down
2021/02/10 09:40:23 [notice] 2763#2763: exiting
2021/02/10 09:40:23 [notice] 2767#2767: exiting
2021/02/10 09:40:23 [notice] 2761#2761: exiting
2021/02/10 09:40:23 [notice] 2760#2760: exit
2021/02/10 09:40:23 [notice] 2753#2753: exit
2021/02/10 09:40:23 [notice] 2766#2766: exit
2021/02/10 09:40:23 [notice] 2764#2764: gracefully shutting down
2021/02/10 09:40:23 [notice] 2764#2764: exiting
2021/02/10 09:40:23 [notice] 2752#2752: gracefully shutting down
2021/02/10 09:40:23 [notice] 2752#2752: exiting
2021/02/10 09:40:23 [notice] 2763#2763: exit
2021/02/10 09:40:23 [notice] 2762#2762: exit
2021/02/10 09:40:23 [notice] 2764#2764: exit
2021/02/10 09:40:23 [notice] 2759#2759: exit
2021/02/10 09:40:23 [notice] 2755#2755: exit
2021/02/10 09:40:23 [notice] 2752#2752: exit
2021/02/10 09:40:23 [notice] 2767#2767: exit
2021/02/10 09:40:23 [notice] 2761#2761: exit
2021/02/10 09:40:23 [notice] 2758#2758: gracefully shutting down
2021/02/10 09:40:23 [notice] 2758#2758: exiting
2021/02/10 09:40:23 [notice] 2756#2756: gracefully shutting down
2021/02/10 09:40:23 [notice] 2756#2756: exiting
2021/02/10 09:40:23 [notice] 2758#2758: exit
2021/02/10 09:40:23 [notice] 2756#2756: exit
2021/02/10 09:40:23 [notice] 2765#2765: gracefully shutting down
2021/02/10 09:40:23 [notice] 2765#2765: exiting
2021/02/10 09:40:23 [notice] 2757#2757: gracefully shutting down
2021/02/10 09:40:23 [notice] 2757#2757: exiting
2021/02/10 09:40:23 [notice] 2754#2754: gracefully shutting down
2021/02/10 09:40:23 [notice] 2754#2754: exiting
2021/02/10 09:40:23 [notice] 2754#2754: exit
2021/02/10 09:40:23 [notice] 2765#2765: exit
2021/02/10 09:40:23 [notice] 2757#2757: exit
I0210 09:40:23.604803       1 event.go:282] Event(v1.ObjectReference{Kind:&quot;Ingress&quot;, Namespace:&quot;xxxx&quot;, Name:&quot;xxxx&quot;, UID:&quot;82a71705-194e-4919-a7e2-a511d52c1a7a&quot;, APIVersion:&quot;networking.k8s.io/v1beta1&quot;, ResourceVersion:&quot;77919848&quot;, FieldPath:&quot;&quot;}): type: 'Normal' reason: 'AddedOrUpdated' Configuration for xxxx/xxxx was added or updated 
I0210 09:40:23.604873       1 event.go:282] Event(v1.ObjectReference{Kind:&quot;Ingress&quot;, Namespace:&quot;xxxx&quot;, Name:&quot;xxxx&quot;, UID:&quot;10246997-07ae-41e1-b811-0ec630647f3b&quot;, APIVersion:&quot;networking.k8s.io/v1beta1&quot;, ResourceVersion:&quot;182677830&quot;, FieldPath:&quot;&quot;}): type: 'Normal' reason: 'AddedOrUpdated' Configuration for xxxx/xxxx was added or updated 
I0210 09:40:23.605520       1 event.go:282] Event(v1.ObjectReference{Kind:&quot;Ingress&quot;, Namespace:&quot;xxxx&quot;, Name:&quot;xxxx&quot;, UID:&quot;d628825f-1b06-4719-b4b0-4d971b8c0a54&quot;, APIVersion:&quot;networking.k8s.io/v1beta1&quot;, ResourceVersion:&quot;182677778&quot;, FieldPath:&quot;&quot;}): type: 'Normal' reason: 'AddedOrUpdated' Configuration for xxxx/xxxx was added or updated 
I0210 09:40:23.605557       1 event.go:282] Event(v1.ObjectReference{Kind:&quot;Ingress&quot;, Namespace:&quot;xxxx&quot;, Name:&quot;xxxx&quot;, UID:&quot;4b7b1fa1-1d7d-41a5-9d97-5f5aee52ade7&quot;, APIVersion:&quot;networking.k8s.io/v1beta1&quot;, ResourceVersion:&quot;182678922&quot;, FieldPath:&quot;&quot;}): type: 'Normal' reason: 'AddedOrUpdated' Configuration for xxxx/xxxx was added or updated 
I0210 09:40:23.605569       1 event.go:282] Event(v1.ObjectReference{Kind:&quot;Ingress&quot;, Namespace:&quot;xxxx&quot;, Name:&quot;xxxx&quot;, UID:&quot;b86b8b8e-82b9-40d0-b02d-073db557c0e1&quot;, APIVersion:&quot;networking.k8s.io/v1beta1&quot;, ResourceVersion:&quot;182678955&quot;, FieldPath:&quot;&quot;}): type: 'Normal' reason: 'AddedOrUpdated' Configuration for xxxx/xxxx was added or updated 
I0210 09:40:23.605577       1 event.go:282] Event(v1.ObjectReference{Kind:&quot;Ingress&quot;, Namespace:&quot;xxxx&quot;, Name:&quot;xxxx&quot;, UID:&quot;585ccdee-9807-442e-9b4f-7d1a97264216&quot;, APIVersion:&quot;networking.k8s.io/v1beta1&quot;, ResourceVersion:&quot;182677754&quot;, FieldPath:&quot;&quot;}): type: 'Normal' reason: 'AddedOrUpdated' Configuration for xxxx/xxxx was added or updated 
W0210 09:40:23.614001       1 listers.go:79] can not retrieve list of objects using index : Index with name namespace does not exist
W0210 09:40:23.614213       1 listers.go:79] can not retrieve list of objects using index : Index with name namespace does not exist
W0210 09:40:23.614304       1 listers.go:79] can not retrieve list of objects using index : Index with name namespace does not exist
2021/02/10 09:40:23 [notice] 19#19: signal 17 (SIGCHLD) received from 2763
2021/02/10 09:40:23 [notice] 19#19: worker process 2755 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: worker process 2763 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: worker process 2767 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: signal 29 (SIGIO) received
2021/02/10 09:40:23 [notice] 19#19: signal 17 (SIGCHLD) received from 2766
2021/02/10 09:40:23 [notice] 19#19: worker process 2752 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: worker process 2753 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: worker process 2766 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: signal 29 (SIGIO) received
2021/02/10 09:40:23 [notice] 19#19: signal 17 (SIGCHLD) received from 2756
2021/02/10 09:40:23 [notice] 19#19: worker process 2756 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: worker process 2758 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: worker process 2759 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: worker process 2760 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: worker process 2761 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: worker process 2762 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: worker process 2764 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: signal 29 (SIGIO) received
2021/02/10 09:40:23 [notice] 19#19: signal 17 (SIGCHLD) received from 2754
2021/02/10 09:40:23 [notice] 19#19: worker process 2754 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: signal 29 (SIGIO) received
2021/02/10 09:40:23 [notice] 19#19: signal 17 (SIGCHLD) received from 2765
2021/02/10 09:40:23 [notice] 19#19: worker process 2765 exited with code 0
2021/02/10 09:40:23 [notice] 19#19: signal 29 (SIGIO) received
</code></pre>
<p>This seem to be looping forever and very quickly, on all the pods.
I deployed my controller using <a href="https://github.com/nginxinc/kubernetes-ingress/tree/v1.10.0/deployments" rel="nofollow noreferrer">these manifests</a> and recreated the default server secret as mentioned in the release note.</p>
<p>The controller arguments are:</p>
<pre class="lang-yaml prettyprint-override"><code>args:
  - -nginx-configmaps=$(POD_NAMESPACE)/nginx-config
  - -default-server-tls-secret=$(POD_NAMESPACE)/default-server-secret
  - -global-configuration=$(POD_NAMESPACE)/nginx-configuration
  - -report-ingress-status
  - -enable-prometheus-metrics
  - -enable-snippets
</code></pre>
<p>And here is the content of my <code>nginx-config</code> CM:</p>
<pre class="lang-yaml prettyprint-override"><code>data:
  client-max-body-size: 50m
  proxy-read-timeout: 5m
  server-tokens: &quot;False&quot;
</code></pre>
<p>Any idea what is happening there and how to solve this issue?</p>
<p><strong>Edit</strong>:</p>
<p>After some more research I found out that two of my ingresses are constantly being updated:</p>
<pre class="lang-yaml prettyprint-override"><code>Name:             xxxx
Namespace:        xxxx
Address:          
Default backend:  default-http-backend:80 (&lt;none&gt;)
TLS:
  xxxx terminates xxxx
Rules:
  Host  Path  Backends
  ----  ----  --------
  *     *     default-http-backend:80 (&lt;none&gt;)
Annotations:
  ingress.kubernetes.io/ssl-redirect:                true
  kubectl.kubernetes.io/last-applied-configuration:  {&quot;apiVersion&quot;:&quot;extensions/v1beta1&quot;,&quot;kind&quot;:&quot;Ingress&quot;,&quot;metadata&quot;:{&quot;annotations&quot;:{&quot;ingress.kubernetes.io/ssl-redirect&quot;:&quot;true&quot;,&quot;kubernetes.io/ingress.class&quot;:&quot;nginx&quot;,&quot;nginx.org/mergeable-ingress-type&quot;:&quot;master&quot;},&quot;labels&quot;:{&quot;app.kubernetes.io/component&quot;:&quot;xxxx&quot;,&quot;app.kubernetes.io/instance&quot;:&quot;xxxx&quot;,&quot;app.kubernetes.io/name&quot;:&quot;xxxx&quot;,&quot;app.kubernetes.io/part-of&quot;:&quot;xxxx&quot;,&quot;argocd.argoproj.io/instance&quot;:&quot;xxxx&quot;},&quot;name&quot;:&quot;xxxx&quot;,&quot;namespace&quot;:&quot;xxxx&quot;},&quot;spec&quot;:{&quot;rules&quot;:[{&quot;host&quot;:&quot;xxxx&quot;}],&quot;tls&quot;:[{&quot;hosts&quot;:[&quot;xxxx&quot;],&quot;secretName&quot;:&quot;xxxx&quot;}]}}

  kubernetes.io/ingress.class:       nginx
  nginx.org/mergeable-ingress-type:  master
Events:
  Type    Reason          Age                       From                      Message
  ----    ------          ----                      ----                      -------
  Normal  AddedOrUpdated  3m5s (x2600127 over 6d)   nginx-ingress-controller  Configuration for xxxx/xxxx was added or updated
  Normal  AddedOrUpdated  2m12s (x2599793 over 6d)  nginx-ingress-controller  Configuration for xxxx/xxxx was added or updated
  Normal  AddedOrUpdated  66s (x2600182 over 6d)    nginx-ingress-controller  Configuration for xxxx/xxxx was added or updated
</code></pre>
<pre class="lang-yaml prettyprint-override"><code>apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  annotations:
    ingress.kubernetes.io/ssl-redirect: &quot;true&quot;
    kubectl.kubernetes.io/last-applied-configuration: |
      {&quot;apiVersion&quot;:&quot;extensions/v1beta1&quot;,&quot;kind&quot;:&quot;Ingress&quot;,&quot;metadata&quot;:{&quot;annotations&quot;:{&quot;ingress.kubernetes.io/ssl-redirect&quot;:&quot;true&quot;,&quot;kubernetes.io/ingress.class&quot;:&quot;nginx&quot;,&quot;nginx.org/mergeable-ingress-type&quot;:&quot;master&quot;},&quot;labels&quot;:{&quot;app.kubernetes.io/component&quot;:&quot;xxxx&quot;,&quot;app.kubernetes.io/instance&quot;:&quot;xxxx&quot;,&quot;app.kubernetes.io/name&quot;:&quot;xxxx&quot;,&quot;app.kubernetes.io/part-of&quot;:&quot;xxxx&quot;,&quot;argocd.argoproj.io/instance&quot;:&quot;xxxx&quot;},&quot;name&quot;:&quot;xxxx&quot;,&quot;namespace&quot;:&quot;xxxx&quot;},&quot;spec&quot;:{&quot;rules&quot;:[{&quot;host&quot;:&quot;xxxx&quot;}],&quot;tls&quot;:[{&quot;hosts&quot;:[&quot;xxxx&quot;],&quot;secretName&quot;:&quot;xxxx&quot;}]}}
    kubernetes.io/ingress.class: nginx
    nginx.org/mergeable-ingress-type: master
  creationTimestamp: &quot;2021-01-18T09:55:07Z&quot;
  generation: 1
  labels:
    app.kubernetes.io/component: xxxx
    app.kubernetes.io/instance: xxxx
    app.kubernetes.io/name: xxxx
    app.kubernetes.io/part-of: xxxx
    argocd.argoproj.io/instance: xxxx
  name: xxxx
  namespace: xxxx
  resourceVersion: &quot;182677754&quot;
  selfLink: /apis/extensions/v1beta1/namespaces/xxxx/ingresses/xxxx
  uid: 585ccdee-9807-442e-9b4f-7d1a97264216
spec:
  rules:
  - host: xxxx
  tls:
  - hosts:
    - xxxx
    secretName: xxxx
status:
  loadBalancer:
    ingress:
    - {}
</code></pre>
<p>My environment is managed by ArgoCD but after checking the logs it doesn't look like the updates are coming from ArgoCD. I wonder if the updates are related to the <code>-report-ingress-status</code> option.</p>
<p><strong>Edit II</strong>:
I removed the <code>-report-ingress-status</code> and it didn't change anything.</p>

<p>I don't know the actual root cause but I deleted all the TLS secrets, certificates and ingresses that were being constantly being updated and recreated them. It solved this issue.</p>
<p>Different incidents happened prior to this issue and might have been related to it: 2 of my 3 ingress nodes failed, during the upgrade the wrong CRDs were applied before being quickly fixed.</p>
<p>That's all I can say at the moment, but deleting the resources related to the ingresses being constantly updated and recreating them do solve the issue.</p>
