diff --git a/foudations/mogo-httpdns/src/main/java/com/mogo/cloud/httpdns/HttpDnsHelper.kt b/foudations/mogo-httpdns/src/main/java/com/mogo/cloud/httpdns/HttpDnsHelper.kt
index b8c0cb2..bab84cb 100644
--- a/foudations/mogo-httpdns/src/main/java/com/mogo/cloud/httpdns/HttpDnsHelper.kt
+++ b/foudations/mogo-httpdns/src/main/java/com/mogo/cloud/httpdns/HttpDnsHelper.kt
@@ -3,7 +3,6 @@ package com.mogo.cloud.httpdns
 import android.os.Handler
 import android.os.HandlerThread
 import android.os.Message
-import android.text.TextUtils
 import android.util.ArrayMap
 import com.mogo.cloud.httpdns.bean.HttpDnsSimpleLocation
 import com.mogo.cloud.httpdns.listener.IMogoHttpDns
@@ -71,10 +70,14 @@ internal class HttpDnsHelper(private val builder: MogoHttpDnsConfig) : Handler.C
         if (addressChangedListener == null) {
             L.d(TAG, "addressChangeList is null")
         }
+        if (nAddress == null || nAddress.isEmpty()) {
+            L.e(TAG, "getHttpDnsAddressFromNet nAddress result is null or empty ")
+            return
+        }
         if (addressMap == null) {
             addressMap = nAddress
             addressChangedListener?.onAddressChanged(addressMap)
-        } else if (nAddress != null) {
+        } else {
             addressMap = nAddress
             addressChangedListener?.onAddressChanged(mapDiff(nAddress, addressMap!!))
         }
@@ -126,9 +129,11 @@ internal class HttpDnsHelper(private val builder: MogoHttpDnsConfig) : Handler.C
         L.d(TAG, "getHttpDnsCachedAddress: $type-$host")
         httpDnsCache?.let {
             val currentLoc = builder.getCurrentLocation()?.getCurrentLocation()
-            if (currentLoc != null && !TextUtils.equals(it.cityCode, currentLoc.cityCode)) {
-                getHttpDnsAddress(type, _host)
-                httpDnsCache = currentLoc
+            currentLoc?.let { cur ->
+                if (it.cityCode.isNotEmpty() && cur.cityCode.isNotEmpty()) {
+                    getHttpDnsAddress(type, _host)
+                    httpDnsCache = currentLoc
+                }
             }
         }
         return addressMap?.get("$type-$host") ?: defaultUrl
diff --git a/foudations/mogo-httpdns/src/main/java/com/mogo/cloud/httpdns/util/L.kt b/foudations/mogo-httpdns/src/main/java/com/mogo/cloud/httpdns/util/L.kt
index d908640..4b9698a 100644
--- a/foudations/mogo-httpdns/src/main/java/com/mogo/cloud/httpdns/util/L.kt
+++ b/foudations/mogo-httpdns/src/main/java/com/mogo/cloud/httpdns/util/L.kt
@@ -12,12 +12,10 @@ object L {
     fun d(tag: String, msg: String) {
         if (isDebug) {
             Log.d(tag, msg)
-//            println(msg)
         }
     }
 
     fun e(tag: String, msg: String) {
         Log.e(tag, msg)
-//        println(msg)
     }
 }
\ No newline at end of file