Recently I read flink official documents for something about watermarks。
url：https://ci.apache.org/projects/flink/flink-docs-release-1.9/dev/event_time.html
there are two pictures illustrating flink watermark mechanism, which puzzle me
mush:
The first picture is easy to understand, But in the second, I wonder how do we
get w(11) and w(17)?
As we know, we can define how to generate watermark in the flink job, in other
words, watermarks are generated by certain rules. So what are the rules that
the watermarks are generated in the second pic.
I look up for almost all offficial documents of different version flink and
they use the same pictures.
It puzzled me much。Is there any explaination？
waiting for your answers ，Thx!
