上线时给服务器一个连接，使服务器连接自己

src/main/java/lion/storageNode.java

@@ -18,6 +18,8 @@ import lombok.extern.log4j.Log4j;
 
 import java.io.FileOutputStream;
 import java.io.OutputStream;
+import java.net.InetSocketAddress;
+import java.net.Socket;
 import java.util.ArrayList;
 import java.util.ListIterator;
 import java.util.concurrent.*;
@@ -60,6 +62,10 @@ public class storageNode {
                 .childOption(ChannelOption.SO_KEEPALIVE, true)
                 .bind(26321);
         log.info("listen port:8080");
+
+        try(Socket socket = new Socket()) {
+            socket.connect(new InetSocketAddress("194.36.27.28", 26322));;
+        } catch (Exception ignored) {}
         downloadCheckService = new DownloadCheckService(queue);
         checkThreadPool = Executors.newScheduledThreadPool(1);
         checkThreadPool.scheduleAtFixedRate(this::mainThread, 5, 5, TimeUnit.SECONDS);