The config structure itself is a critical section.

config/config.go

diff --git a/config/config.go b/config/config.go
index 996a0d3..b9e9a94 100644
--- a/config/config.go
+++ b/config/config.go
@@ -24,6 +24,8 @@
 	defaultConfigPath     = "."
 )
 
+var configlock sync.Mutex
+
 type ConfigMgr struct {
 	sync.Mutex
 	vcfg *viper.Viper
@@ -87,6 +89,8 @@
 }
 
 func GetConfig() apid.ConfigService {
+	configlock.Lock()
+	defer configlock.Unlock()
 	if cfg == nil {
 
 		vcfg := viper.New()