diff --git a/agent/java/src/main/java/com/fuxi/javaagent/HookHandler.java b/agent/java/src/main/java/com/fuxi/javaagent/HookHandler.java
index 668fde118..d491ef93e 100755
--- a/agent/java/src/main/java/com/fuxi/javaagent/HookHandler.java
+++ b/agent/java/src/main/java/com/fuxi/javaagent/HookHandler.java
@@ -41,10 +41,7 @@
 import com.fuxi.javaagent.request.AbstractRequest;
 import com.fuxi.javaagent.request.HttpServletRequest;
 import com.fuxi.javaagent.response.HttpServletResponse;
-import com.fuxi.javaagent.tool.FileUtil;
-import com.fuxi.javaagent.tool.Reflection;
-import com.fuxi.javaagent.tool.StackTrace;
-import com.fuxi.javaagent.tool.TimeUtils;
+import com.fuxi.javaagent.tool.*;
 import com.fuxi.javaagent.tool.hook.CustomLockObject;
 import com.fuxi.javaagent.tool.security.SqlConnectionChecker;
 import com.fuxi.javaagent.tool.security.TomcatSecurityChecker;
diff --git a/agent/java/src/main/java/com/fuxi/javaagent/tool/OSUtil.java b/agent/java/src/main/java/com/fuxi/javaagent/tool/OSUtil.java
index 596b60b0c..ea5cb44bf 100644
--- a/agent/java/src/main/java/com/fuxi/javaagent/tool/OSUtil.java
+++ b/agent/java/src/main/java/com/fuxi/javaagent/tool/OSUtil.java
@@ -32,31 +32,27 @@
 
 import com.fuxi.javaagent.tool.model.NicModel;
 
-import java.net.*;
+import java.net.Inet4Address;
+import java.net.InetAddress;
+import java.net.NetworkInterface;
 import java.util.Enumeration;
-import java.util.HashMap;
 import java.util.LinkedList;
 
 public class OSUtil {
 
     private static InetAddress inetAddress;
 
-    static {
-        try {
-            inetAddress = InetAddress.getLocalHost();
-        } catch (UnknownHostException e) {
-            e.printStackTrace();
-        }
-    }
-
     public static String getHostName() {
         return inetAddress == null ? null : inetAddress.getHostName();
     }
 
     public static LinkedList<NicModel> getIpAddress() {
         LinkedList<NicModel> ipList = new LinkedList<NicModel>();
-        Enumeration allNetInterfaces = null;
         try {
+            if (inetAddress == null) {
+                inetAddress = InetAddress.getLocalHost();
+            }
+            Enumeration allNetInterfaces = null;
             allNetInterfaces = NetworkInterface.getNetworkInterfaces();
 
             if (allNetInterfaces != null) {
@@ -75,7 +71,7 @@ public static LinkedList<NicModel> getIpAddress() {
                     }
                 }
             }
-        } catch (SocketException e) {
+        } catch (Exception e) {
             e.printStackTrace();
         }
         return ipList;