ORA-31485: invalid database link

admin

ORA-31485: invalid database link
Cause: The database linkused to connect from a staging database to a source
database was invalid. The database link may not exist, may not be accessible tothe
current user, or may have been redefined since the Distributed HotLog change
source was originally created.
Action: Make sure that thereis a database link to the source_database for the
Distributed HotLog change source. Make sure this database link is accessible to
the current user.