Grpc error after TiFlash restarts for a while #9159
Description
After pingcap/tidb#53698 which updates several dependecies including grpc from 1.63.2 to 1.64, several tiflash regression test failed constantly due to GRPC error:
rpc error: code = DeadlineExceeded desc = received context error while waiting for new LB policy update: context deadline exceeded
rpc error: code = Unavailable desc = connection error: desc = \"transport: Error while dialing: dial tcp 10.200.86.26:3930: i/o timeout
These errors always happen after TiFlash retarts for a while.