kv: avoid NPE caused by log line
kv: avoid NPE caused by log line

cockroachdb/cockroach,veteranlu/cockroach,glycerine/cockroach,petermattis/cockroach,veteranlu/cockroach,maxlang/cockroach,vaibhavarora/cockroach,maxlang/cockroach,glycerine/cockroach,paperstreet/cockroach,glycerine/cockroach,paperstreet/cockroach,cockroachdb/cockroach,vaibhavarora/cockroach,petermattis/cockroach,veteranlu/cockroach,maxlang/cockroach,glycerine/cockroach,cockroachdb/cockroach,petermattis/cockroach,paperstreet/cockroach,petermattis/cockroach,vaibhavarora/cockroach,petermattis/cockroach,veteranlu/cockroach,petermattis/cockroach,maxlang/cockroach,vaibhavarora/cockroach,glycerine/cockroach,vaibhavarora/cockroach,paperstreet/cockroach,glycerine/cockroach,cockroachdb/cockroach,veteranlu/cockroach,maxlang/cockroach,paperstreet/cockroach,petermattis/cockroach,glycerine/cockroach,paperstreet/cockroach,vaibhavarora/cockroach,cockroachdb/cockroach,maxlang/cockroach,glycerine/cockroach,cockroachdb/cockroach,veteranlu/cockroach,paperstreet/cockroach,cockroachdb/cockroach,veteranlu/cockroach,vaibhavarora/cockroach,petermattis/cockroach,maxlang/cockroach,veteranlu/cockroach,cockroachdb/cockroach,vaibhavarora/cockroach,maxlang/cockroach,paperstreet/cockroach