statistics: fix panic when `getStatsReader` fail (#15651)#15710

Merged

sre-bot merged 2 commits intopingcap:release-3.1from sre-bot:release-3.1-2846f5c5ba1f

Apr 3, 2020

+19-6

Commits on Mar 26, 2020

statistics: fix panic when getStatsReader fail (pingcap#15651 )

winoros
authored and
sre-bot
committed

Commits on Apr 3, 2020

Merge branch 'release-3.1' into release-3.1-2846f5c5ba1f
sre-bot
authored