apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/entity/model/NamespaceReleaseModel.java/NamespaceReleaseModel/isInvalid
class NamespaceReleaseModel:  @Override
  public boolean isInvalid() {
    return StringUtils.isContainEmpty(appId, env, clusterName, namespaceName, releaseTitle);
  }