I took Hadoop training from Data-Flair. As I come from database background, the complimentary Java course was quite helpful. Mr. Anish is an expert instructor who made all the classes very interesting and the supportive documentation and the tutorial blog made it more descriptive and simple to learn Hadoop.
The study material on data flair blog with the class recordings make the best combination for any beginner to learn Hadoop. The quiz part was my most favourite part of the training. This made sure that we had done good revision of all his classes of the week.