Error Message: Access is denied. Verify that either the Default Content Access Account has access to this repository, or add a crawl rule to crawl this repository. If the repository being crawled is a SharePoint repository, verify that the account you are using has "Full Read" permissions on the SharePoint Web Application being crawled.
Solution 1: Add backconnection host names in the registry
Add a Multi-String Value with name "BackConnectionHostNames".
Add the host names for the sites that are on the local server.
Solution 2: Disable loop-back check on the server ( or add host name to
Create a new 32bit DWORD value "DisableLoopbackCheck" with value as 1
Solution 3: Give your content access account "Retrieve People Data for Search Crawlers" permission on the user profile service application.
Solution 3 : Verify that the search content access account has full read permissions on the web-application.