I am trying to understand the role of Job Manager in Flink, and have come across two possibly distinct interpretations.
1. The online documentation v1.8 signifies that there is at least one Job Manager in a cluster, and it is closely tied to the cluster of machines, by managing all jobs in that cluster of machines. This signifies that Flink's Job Manager is much like Hadoop's Application Manager. 2. The book, "Stream Processing with Apache Flink", writes that, "The Job Manager is the master process that controls the execution of a single application—each application is controlled by a different Job Manager." This signifies that Flink defaults to one Job Manager per job, and the Job Manager is closely tied to that single job, much like Hadoop's Application Master for each job. Please let me know which one is correct. Pankaj
