Symptom:
cef glean adjacency has remained until reload

Conditions:
When frequent ospf cost change continues for long time, the following symptom are seen on the router.

 1) High CPU in Collection Process
 2) Adjacency state of much cef entry turned into "glean"

After ospf cost change is stopped, CPU gets down to normal state.
But, cef glean adjacency remains until reload or "clear cef linecard".