server: close all connection directly when terminate tidb (#8692)#8707

Merged

zz-jason merged 1 commit intopingcap:release-2.1from crazycs520:kill-tidb-conn-2.1

Dec 17, 2018

Commits on Dec 17, 2018

server: close all connection directly when terminate tidb (pingcap#8692 )
crazycs520
committed