diff --git a/skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/buffer/DataBufferThread.java b/skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/buffer/DataBufferThread.java
index 07ecf1187..3248a1456 100644
--- a/skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/buffer/DataBufferThread.java
+++ b/skywalking-server/src/main/java/com/ai/cloud/skywalking/reciever/buffer/DataBufferThread.java
@@ -80,6 +80,14 @@ public class DataBufferThread extends Thread {
 
             }
 
+            if (bool){
+                try {
+                    outputStream.flush();
+                } catch (IOException e) {
+                    logger.error("Flush buffer data failed.", e);
+                }
+            }
+
             if (file.length() > DATA_FILE_MAX_LENGTH) {
                 convertFile();
             }