Change commit to rollBack on fail

I suppose we should rollback transaction before exception. We are in the loop and we should not commit partial result on error or we should not use transaction at all.

Author: flancer64

app/code/Magento/CatalogInventory/Model/StockManagement.php

@@ -102,7 +102,7 @@ public function registerProductsSale($items, $websiteId = null)
             if (!$stockItem->hasAdminArea()
                 && !$this->stockState->checkQty($productId, $orderedQty, $stockItem->getWebsiteId())
             ) {
-                $this->getResource()->commit();
+                $this->getResource()->rollBack();
                 throw new \Magento\Framework\Exception\LocalizedException(
                     __('Not all of your products are available in the requested quantity.')
                 );
@@ -180,7 +180,7 @@ protected function getProductType($productId)
     }
 
     /**
-     * @return Stock
+     * @return ResourceStock
      */
     protected function getResource()
     {