TongruiLi

[Dataflow Streaming] Enabled Heartbeat by Default

3

This sets heartbeat work by default and will rollout along next beam release. This CL also refactors and fixed some unit test issues.

Update CHANGES.md to include streaming NPE issue

2

https://github.com/apache/beam/pull/32566 for reference. Will also update 2.58 and 2.90 accordingly. ------------------------ Thank you for your contribution! Follow this checklist to help us incorporate your contribution quickly and easily: - [...