We have hosted a web application that has 108687 records and when crawled the content source, 104,314 successes and there are 3788 errors from the crawl log.
All these 3788 errors are due to the below error message.
The crawler could not communicate with the server. Check that the server is available and that the firewall access is configured correctly.
We did a google search and gone through below link https://social.technet.microsoft.com/Forums/office/en-US/f378c45f-fa8b-48f3-88bb-739f3cd27830/the-crawler-could-not-communicate-with-the-server-check-that-the-server-is-available-and-that-the?forum=sharepointadminprevious
did modification on the registry editor and the given configuration already exists.
on permission front , we could successfully crawl rest of the data's.
Could you please advise on what is the cause and solution?