fix: chinglish

cluster/cluster_impl/base_cluster_invoker.go

@@ -136,7 +136,7 @@ func (invoker *baseClusterInvoker) doSelectInvoker(lb cluster.LoadBalance, invoc
 
 	selectedInvoker := lb.Select(invokers, invocation)
 
-	//judge to if the selectedInvoker is invoked and available
+	//judge if the selected Invoker is invoked and available
 	if (!selectedInvoker.IsAvailable() && invoker.availablecheck) || isInvoked(selectedInvoker, invoked) {
 		protocol.SetInvokerUnhealthyStatus(selectedInvoker)
 		otherInvokers := getOtherInvokers(invokers, selectedInvoker)

common/extension/conn_checker.go

@@ -33,7 +33,8 @@ func SetConnChecker(name string, fcn func(_ *common.URL) router.ConnChecker) {
 
 // GetHealthChecker gets the HealthChecker with @name
 func GetConnChecker(name string, url *common.URL) router.ConnChecker {
-	if connCheckers[name] == nil {
+	f, ok := connCheckers[name]
+	if !ok || f == nil {
 		panic("connCheckers for " + name + " is not existing, make sure you have import the package.")
 	}
 	return connCheckers[name](url)