diff --git a/skywalking-api/src/main/java/com/ai/cloud/skywalking/sender/DataSenderFactory.java b/skywalking-api/src/main/java/com/ai/cloud/skywalking/sender/DataSenderFactory.java
index b962ed098..d2e27b6d9 100644
--- a/skywalking-api/src/main/java/com/ai/cloud/skywalking/sender/DataSenderFactory.java
+++ b/skywalking-api/src/main/java/com/ai/cloud/skywalking/sender/DataSenderFactory.java
@@ -97,12 +97,16 @@ public class DataSenderFactory {
                         break;
                     }
 
-                    try {
-                        availableSenders.add(new DataSender(tmpScoketAddress));
-                        unUsedSocketAddresses.remove(tmpScoketAddress);
-                    } catch (IOException e) {
+                    synchronized (lock) {
+                        try {
 
+                            availableSenders.add(new DataSender(tmpScoketAddress));
+                            unUsedSocketAddresses.remove(tmpScoketAddress);
+                        } catch (IOException e) {
+
+                        }
                     }
+
                 }
 
                 try {