Multi-threading in Hadoop/Spark
<p>I have an idea about Multi-threading in general but not sure how it is used in Hadoop.</p>

<p>Based on my knowledge, Yarn is responsible for managing/controlling Spark/Mapreduce job resources, can't think of Multi-threading here. Not sure whether it can be used anywhere else in Hadoop Eco System.</p>

<p>I would appreciate if anybody could provide some information on this.</p>

<p>Many thanks,</p>