fix unclosed Thread when create TiSession error (#300)#301

Merged

marsishandsome merged 1 commit intotikv:release-3.1from ti-srebot:release-3.1-489e5c22ec7c

Oct 28, 2021

+4-1

Commits on Oct 28, 2021

cherry pick tikv#300 to release-3.1

marsishandsome
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