If a router receives an outdated, corrupted, or missing link, state advertisement Open Shortest Path First Protocol (OSPF) stays in loading state and generates the OSPF-4-BADLSA error message.
Capture the output from the show tech-support command from the router. To further address this situation, contact Cisco Technical Support.
For more information, refer to the Typical Reasons for OSPF Neighbor Problems section of OSPF Neighbor Problems Explained.
Receiving "ospf-4-badlsa" type error message