I have set the following inside the content sources:

• Incremental crawl to be every 20 minutes
• Full crawl: At 1:00 every day.

When I first set this it was working well, the incremental crawl take between 2-3 minutes and the full crawl take around 30 minutes.

But I check the search service lately and I so that the full crawl duration is 134 hours and when I manually stop it, it restart again and never stops.

Can anyone advice, why my full crawl is not stopping?