To test your hypothesis, I did a basic search for exact matches on "we do not synchronize on the update of the broker node" and Google returned 2 search results in 240ms:
- https://github.com/a0x8o/kafka/blob/master/core/src/main/sca...
- https://jar-download.com/artifacts/org.apache.kafka/kafka_2....
Which contain exactly the source code from GitHub that I was looking for. You'll notice that the first result is actually a0x80's fork of apache/kafka. Google states that some entries very similar to the 2 already displayed were omitted, and I'm able to remove that filter. With that filter removed, I can see the same document indexed from apache/kafka on GitHub.
There's nothing I can do or promise directly, but I can assure you that Google takes the quality of our search results very seriously. If you believe we're not delivering quality results, I strongly encourage you to click that "Send Feedback" link at the bottom of your results so that our teams can act upon your feedback.
Disclosure: I work on Search at Google.
Disclaimer: The words, views, and opinions expressed in this post are my own. They are not representative nor do they represent my employer in any capacity.