Do not re-schedule an already scheduled lock breaker (#15317)

Change-Id: I17dad660470283cd2d269a32d72d2f26ab86e7c4

diff --git a/client/src/com/vaadin/client/ApplicationConnection.java b/client/src/com/vaadin/client/ApplicationConnection.java
index 87fde2de324a99a199781c0c936cb1d5f0ef10ce..e7bbb6530029411d0f75c4163fb0ffdc2885c3fe 100644 (file)
--- a/client/src/com/vaadin/client/ApplicationConnection.java
+++ b/client/src/com/vaadin/client/ApplicationConnection.java
@@ -1498,7 +1498,9 @@ public class ApplicationConnection implements HasHandlers {
             VConsole.log("Postponing UIDL handling due to lock...");
             pendingUIDLMessages.add(new PendingUIDLMessage(start, jsonText,
                     json));
-            forceHandleMessage.schedule(MAX_SUSPENDED_TIMEOUT);
+            if (!forceHandleMessage.isRunning()) {
+                forceHandleMessage.schedule(MAX_SUSPENDED_TIMEOUT);
+            }
             return;
         }