Reset lastPong in onOpen

src/main/java/org/java_websocket/WebSocketImpl.java

@@ -752,6 +752,7 @@ private void write(List<ByteBuffer> bufs) {
   private void open(Handshakedata d) {
     log.trace("open using draft: {}", draft);
     readyState = ReadyState.OPEN;
+    updateLastPong();
     try {
       wsl.onWebsocketOpen(this, d);
     } catch (RuntimeException e) {

src/test/java/org/java_websocket/issues/Issue1203Test.java

@@ -0,0 +1,95 @@
+package org.java_websocket.issues;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import java.net.InetSocketAddress;
+import java.net.URI;
+import java.util.Timer;
+import java.util.TimerTask;
+import java.util.concurrent.CountDownLatch;
+import org.java_websocket.WebSocket;
+import org.java_websocket.client.WebSocketClient;
+import org.java_websocket.handshake.ClientHandshake;
+import org.java_websocket.handshake.ServerHandshake;
+import org.java_websocket.server.WebSocketServer;
+import org.java_websocket.util.SocketUtil;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class Issue1203Test {
+  private final CountDownLatch countServerDownLatch = new CountDownLatch(1);
+  private final CountDownLatch countClientDownLatch = new CountDownLatch(1);
+  boolean isClosedCalled = false;
+  @Test(timeout = 50000)
+  public void testIssue() throws Exception {
+    int port = SocketUtil.getAvailablePort();
+    WebSocketServer server = new WebSocketServer(new InetSocketAddress(port)) {
+      @Override
+      public void onOpen(WebSocket conn, ClientHandshake handshake) {
+      }
+
+      @Override
+      public void onClose(WebSocket conn, int code, String reason, boolean remote) {
+      }
+
+      @Override
+      public void onMessage(WebSocket conn, String message) {
+      }
+
+      @Override
+      public void onError(WebSocket conn, Exception ex) {
+      }
+
+      @Override
+      public void onStart() {
+        countServerDownLatch.countDown();
+      }
+    };
+    final WebSocketClient client = new WebSocketClient(new URI("ws://localhost:" + port)) {
+      @Override
+      public void onOpen(ServerHandshake handshakedata) {
+        countClientDownLatch.countDown();
+      }
+
+      @Override
+      public void onMessage(String message) {
+
+      }
+
+      @Override
+      public void onClose(int code, String reason, boolean remote) {
+        isClosedCalled = true;
+      }
+
+      @Override
+      public void onError(Exception ex) {
+
+      }
+    };
+
+    server.setConnectionLostTimeout(10);
+    server.start();
+    countServerDownLatch.await();
+
+    client.setConnectionLostTimeout(10);
+    Timer timer = new Timer();
+    TimerTask task = new TimerTask() {
+      @Override
+      public void run() {
+        try {
+          client.connectBlocking();
+        } catch (InterruptedException e) {
+          e.printStackTrace();
+        }
+      }
+    };
+    timer.schedule(task, 15000);
+    countClientDownLatch.await();
+    Thread.sleep(30000);
+    Assert.assertFalse(isClosedCalled);
+    client.closeBlocking();
+    server.stop();
+  }
+}