Why kubectl get pods displays the following error "API error (500): No command specified" ?

Issue

• kubernetes API error (500): No command specified message is noticed while executing the command kubectl get pods. The pod never gets scheduled

[root@XXX ~]# kubectl get pod
POD                   IP           CONTAINER(S)   IMAGE(S)   HOST                              LABELS                    STATUS    CREATED   MESSAGE
db-controller-q7h3b   10.20.79.5                             X.X.X.X/X.X.X.X                   name=db,selectorname=db   Pending   7 days    db             dbforweb                                                               Waiting             API error (500): No command specified