diff --git a/src/main/java/racal/sunyard/main/SydApi4j.java b/src/main/java/racal/sunyard/main/SydApi4j.java
index 433b7d8..e335d40 100644
--- a/src/main/java/racal/sunyard/main/SydApi4j.java
+++ b/src/main/java/racal/sunyard/main/SydApi4j.java
@@ -16,6 +16,7 @@ import com.sunyard.constant.CertUsage;
 import com.sunyard.entity.ImportResult;
 import com.sunyard.entity.MutiReturn7;
 import com.sunyard.entity.Struct;
+import com.sunyard.entity.TimeStats;
 import com.sunyard.log.ILogFactory;
 import com.sunyard.log.ILogger;
 import com.sunyard.proto.Packet;
@@ -2882,19 +2883,21 @@ public class SydApi4j implements SydApi {
             try {
                 socket.getInputStream().close();
             } catch (Exception ignored) {
+                // ignore
             }
 
 
             try {
                 socket.getOutputStream().close();
             } catch (Exception ignored) {
-                ignored.printStackTrace();
+                // ignored.printStackTrace();
             }
 
 
             try {
                 socket.close();
             } catch (Exception ignored) {
+                // ignore
             }
 
         }