sessionctx: fix data-race bug when alloc task id (#28022)#28283

Merged

ti-chi-bot merged 4 commits intopingcap:release-5.2from ti-srebot:release-5.2-9a7f572d0ab1

Oct 13, 2021

+32

Commits on Sep 23, 2021

cherry pick pingcap#28022 to release-5.2

hanfei1991
authored and
ti-srebot
committed

Commits on Oct 13, 2021