[Logging 5.3] Elasticsearch cluster upgrade stuck

Issue: Elasticsearch cluster upgrade stuck.

Findings:

We can see pod elasticsearch-cdm-tnwarhmo-1 is on the latest image and elasticsearch-cdm-tnwarhmo-2 and elasticsearch-cdm-tnwarhmo-3 are on the old image.

~~~
  nodes:
  - deploymentName: elasticsearch-cdm-tnwarhmo-1
    upgradeStatus:
      scheduledUpgrade: "True"
      underUpgrade: "True"
      upgradePhase: preparationComplete
  - deploymentName: elasticsearch-cdm-tnwarhmo-2
    upgradeStatus:
      scheduledUpgrade: "True"
  - deploymentName: elasticsearch-cdm-tnwarhmo-3
    upgradeStatus:
      scheduledUpgrade: "True"
~~~

Verified the latest image by installing the test logging cluster.

Elasticsearch operator logs.

~~~

,"cluster":"elasticsearch","namespace":"openshift-logging"}
~~~

Pod 'elasticsearch-cdm-tnwarhmo-1' is already restarted and is up and running. I am wondering why the operator is stuck at 'timed out waiting for node to rollout'.

I tried to replicate this issue in the test cluster but the upgrade was completed successfully.

~~~
[demeestg@pinocp01 ~]$ oc get sub,ip,csv -n openshift-logging
NAME                                                PACKAGE           SOURCE             CHANNEL
subscription.operators.coreos.com/cluster-logging   cluster-logging   redhat-operators   stable-5.3NAME                                             CSV                        APPROVAL    APPROVED
installplan.operators.coreos.com/install-hlbhw   cluster-logging.5.3.0-55   Automatic   true
installplan.operators.coreos.com/install-m5bvh   cluster-logging.5.3.2-20   Automatic   true
installplan.operators.coreos.com/install-r6wfq   cluster-logging.5.3.1-12   Automatic   trueNAME                                                                           DISPLAY                            VERSION    REPLACES                            PHASE
clusterserviceversion.operators.coreos.com/cluster-logging.5.3.2-20            Red Hat OpenShift Logging          5.3.2-20   cluster-logging.5.3.1-12            Succeeded
clusterserviceversion.operators.coreos.com/elasticsearch-operator.5.3.2-20     OpenShift Elasticsearch Operator   5.3.2-20   elasticsearch-operator.5.3.1-12     Succeeded
clusterserviceversion.operators.coreos.com/redhat-openshift-pipelines.v1.5.2   Red Hat OpenShift Pipelines        1.5.2      redhat-openshift-pipelines.v1.4.1   Succeeded
~~~

Please let me know in case of any other information is required.