tikvclient: add metrics for gRPC connection transient failure (#12084)#12093

Merged

sre-bot merged 1 commit intopingcap:release-3.0from lonng:grpc-state-metrics-3.0

Sep 9, 2019

+39-3

Commits on Sep 9, 2019

tikvclient: add metrics for gRPC connection transient failure (#12084 )
lonng
committed