sink: fix kafka max message size inaccurate issue. (#3002)#3047

Merged

ti-chi-bot merged 3 commits intopingcap:release-5.0from ti-chi-bot:cherry-pick-3002-to-release-5.0

Oct 15, 2021

+197-110

Commits on Oct 14, 2021

This is an automated cherry-pick of pingcap#3002

3AceShowHand
authored and
ti-chi-bot
committed
add comment about kafka config initializa.
3AceShowHand
committed
fix conflicts.
3AceShowHand
committed