flink 学习笔记 update@20211030

前言

通过官方的示例工程的代码学习flink的各种功能（注意使用JDK8）

术语解释

JobMaster implementation

The job master is responsible for the execution of a single JobGraph.

It offers the following methods as part of its rpc interface to interact with the JobMaster remotely:

Tumbling Windows (Aggregations Using GROUP BY)

When a windowed query processes each window in a non-overlapping manner, the window is referred to as a tumbling window. In this case, each record on an in-application stream belongs to a specific window. It is processed only once (when the query processes the window to which the record belongs).

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