Fixes an occasional synchronization problem with duplicate updates (#13334)

Change-Id: I538556b5b307d1e187e68799e7bab622196d2a24

diff --git a/server/src/com/vaadin/data/RpcDataProviderExtension.java b/server/src/com/vaadin/data/RpcDataProviderExtension.java
index 86fa11f62e1e5a21b59b2ed6327edc139bd21d3d..318530089766ec7c766a54e4ab7f344fd3ead220 100644 (file)
--- a/server/src/com/vaadin/data/RpcDataProviderExtension.java
+++ b/server/src/com/vaadin/data/RpcDataProviderExtension.java
@@ -148,7 +148,7 @@ public class RpcDataProviderExtension extends AbstractExtension {
                 if (!itemIdToKey.containsKey(itemId)) {
                     itemIdToKey.put(itemId, nextKey());
                 }
-                indexToItemId.put(ii, itemId);
+                indexToItemId.forcePut(ii, itemId);
             }
         }