pb: update pb parser to avoid drainer failure (#1093)#1122

Merged

ti-chi-bot merged 6 commits intopingcap:release-5.1from ti-chi-bot:cherry-pick-1093-to-release-5.1

Feb 9, 2022

+97-62

Commits on Jan 13, 2022

This is an automated cherry-pick of pingcap#1093

lichunzhu
authored and
ti-chi-bot
committed

Commits on Feb 7, 2022

Commits on Feb 8, 2022

Commits on Feb 9, 2022

Merge branch 'release-5.1' into cherry-pick-1093-to-release-5.1
ti-chi-bot
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