In Redhat6 future systems will exist yum repositoryYum database manually generatedThis issue
And several previous versions of the database are automatically generated
May be mirrored with redhat6 about it .xml files and package files are not in a place that no detailed research to explore next time
First determine yum of these packages have been fitted
There areyum yum-updatesd yum-security yum-metadata-parser yum-rhh-plu[……]