tikv: fix unexpected retry region request when context cancel (#20030)#20031

Merged

ti-srebot merged 3 commits intopingcap:release-4.0from ti-srebot:release-4.0-1dcd15648048

Sep 18, 2020

+7

Commits on Sep 16, 2020

cherry pick pingcap#20030 to release-4.0

lzmhhh123
authored and
ti-srebot
committed

Commits on Sep 17, 2020

Merge branch 'release-4.0' into release-4.0-1dcd15648048
ti-srebot
authored

Commits on Sep 18, 2020

Merge branch 'release-4.0' into release-4.0-1dcd15648048
ti-srebot
authored