This is a cache of https://fess.codelibs.org/13.10/admin/failureurl-guide.html. It is a snapshot of the page at 2021-09-12T01:37:02.741+0000.
Failure url page display urls/paths which are not correctly crawled.
Display Failure url
Select System Info > Failure url in the left menu to display a list page of failure urls, as below.