the placeholder name is the pod name, pod name can not be longer than 63 chars, taskGroup name and appID will be truncated if they go over 20/28 chars respectively, each taskGroup is assigned with an incremental index starting from 0.

find user name from pod label.

assignedPod selects pods that are assigned (scheduled and running).

merge two string maps if the same key defined in the first and second maps the value will be set by the second map.

compare the existing pod condition with the given one, return true if the pod condition remains not changed.