Hotel California - Felder's Contribution Taken From Jethro Tull
The Eagles and Jethro Tull Toured together in the early 70's and Felder probably lifted the Jethro Tull song "We Used To Know" for Hotel California. Ian Anderson acknowledged that but said it wasn't a big deal.
Listen for yourself:
https://www.youtube.com/watch?v=rXB6WcKrtdo
https://www.youtube.com/watch?v=EgO7MamJnqM
The guitar solos in both songs are pretty similar, if not very.