IGNITE-28381 WIP

Author: petrov-mg

modules/core/src/main/java/org/apache/ignite/internal/processors/cache/distributed/dht/atomic/GridDhtAtomicCache.java

@@ -1819,6 +1819,13 @@ private void updateAllAsyncInternal0(
                         top.readLock();
 
                         try {
+                            try {
+                                U.sleep(5);
+                            }
+                            catch (IgniteCheckedException ignored) {
+                                // No-op.
+                            }
+
                             Exception validationErr = validateCacheOperation(top);
 
                             if (validationErr != null) {