[improve] add more debug log

[Mrart]

Contribution Checklist

What changes were proposed in this pull request

Issue Number: close #xxx

Brief change log

add more debug log

Verifying this change

This change is already covered by existing tests, such as (please describe tests).
no

This change added tests and can be verified as follows:
[improve] add more debug log

Does this pull request potentially affect one of the following parts

• Dependencies (does it add or upgrade a dependency): (no)

[wolfboys]

LGTM

[caicancai]

@wolfboys I don’t know why the code now mentions the release branch, 2.1.5 instead of the dev branch. I don’t know if this is the right decision, but in my opinion it is unreasonable.
I remember I expressed my concern a long time ago that when there are more and more branches and the differences between them and the dev branch become larger and larger, it will be difficult to maintain.

[wolfboys]

@wolfboys I don’t know why the code now mentions the release branch, 2.1.5 instead of the dev branch. I don’t know if this is the right decision, but in my opinion it is unreasonable. I remember I expressed my concern a long time ago that when there are more and more branches and the differences between them and the dev branch become larger and larger, it will be difficult to maintain.

2.1.5 only accepts bug fixes and improvements, and does not introduce new features. Currently, the official release version of StreamPark is still the 2.1. x. Therefore, before the official release of version 2.2, bugs and PRs reported by users will be accepted. Updating multiple branches is normal development work. Many projects maintain multiple branches at the same time, such as Apache Flink..

[caicancai]

@Mrart Can you submit another pr to dev?