uncleGen opened a new pull request #28391: URL: https://github.com/apache/spark/pull/28391
### What changes were proposed in this pull request? Structured Streaming progress reporter will always report an `empty` progress when there is no new data. As design, we should provide progress updates every 10s (default) when there is no new data. Before PR: ![20200428175008](https://user-images.githubusercontent.com/7402327/80474832-88a8ca00-897a-11ea-820b-d4be6127d2fe.jpg) ![20200428175037](https://user-images.githubusercontent.com/7402327/80474844-8ba3ba80-897a-11ea-873c-b7137bd4a804.jpg) ![20200428175102](https://user-images.githubusercontent.com/7402327/80474848-8e061480-897a-11ea-806e-28c6bbf1fe03.jpg) After PR: ![image](https://user-images.githubusercontent.com/7402327/80475099-f35a0580-897a-11ea-8fb3-53f343df2c3f.png) ### Why are the changes needed? Fixes a bug around incorrect progress report ### Does this PR introduce any user-facing change? Fixes a bug around incorrect progress report ### How was this patch tested? existing ut and manual test ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org