protected void updateKerberosDescriptorArtifacts() throws AmbariException {
    ArtifactDAO artifactDAO = injector.getInstance(ArtifactDAO.class);
    List<ArtifactEntity> artifactEntities = artifactDAO.findByName("kerberos_descriptor");

    if (artifactEntities != null) {
      for (ArtifactEntity artifactEntity : artifactEntities) {
        updateKerberosDescriptorArtifact(artifactDAO, artifactEntity);
      }
    }
  }
Update the stored Kerberos Descriptor artifacts to conform to the new structure.
<p/>
Finds the relevant artifact entities and iterates through them to process each independently.
ambari-server/src/main/java/org/apache/ambari/server/upgrade/AbstractUpgradeCatalog.java