Item not crawled due to one of the following reasons: Preventive crawl rule; Specified content source hops/depth exceeded; URL has query string parameter; Required protocol handler not found

When you starts crawling on SharePoint environment, you may face the issue like "item not crawled due to one of the following reasons: Preventive crawl rule; Specified content source hops/depth exceeded; URL has query string parameter; Required protocol handler not found; Preventive robots directive".

Steps To resolve

1.Make sure that the default content access account has Full Read permission on the web application.

2. Disable loopback checking.(please refer the link http://www.c-sharpcorner.com/Blogs/4996/how-to-disable-the-authentication-loopback-check.aspx)

Happy Share Pointing :-)