I am learning Hadoop (MapReduce, HDFS), but heard that it is outdated. I am not sure now. Shall I keep learning Hadoop or something else? My goal is to move to Spark (Scala or Python). I also feel HBase and Hive can be useful, but not sure if they are also outdated.
Zookeeper is on my todo list. Is it true that Zookeeper has grown out of Hadoop ecosystem? What is used more popular outside Hadoop?