src/com/wentch/redkale/net/http/WebSocketRunner.java

@@ -228,7 +228,9 @@ public class WebSocketRunner implements Runnable {
         }
     }
 
-    public synchronized void closeRunner() {
+    public void closeRunner() {
+        if (closed) return;
+        synchronized (this) {
             if (closed) return;
             closed = true;
             try {
@@ -246,6 +248,7 @@ public class WebSocketRunner implements Runnable {
             }
             webSocket.onClose(0, null);
         }
+    }
 
     private static final class Masker {