diff --git a/vendor/magento/module-checkout/Model/GuestPaymentInformationManagement.php b/vendor/magento/module-checkout/Model/GuestPaymentInformationManagement.php
index 3054fb787da..7fd7b98f542 100644
--- a/vendor/magento/module-checkout/Model/GuestPaymentInformationManagement.php
+++ b/vendor/magento/module-checkout/Model/GuestPaymentInformationManagement.php
@@ -54,11 +54,6 @@ class GuestPaymentInformationManagement implements \Magento\Checkout\Api\GuestPa
      */
     private $logger;

-    /**
-     * @var ResourceConnection
-     */
-    private $connectionPool;
-
     /**
      * @param \Magento\Quote\Api\GuestBillingAddressManagementInterface $billingAddressManagement
      * @param \Magento\Quote\Api\GuestPaymentMethodManagementInterface $paymentMethodManagement
@@ -75,8 +70,7 @@ class GuestPaymentInformationManagement implements \Magento\Checkout\Api\GuestPa
         \Magento\Quote\Api\GuestCartManagementInterface $cartManagement,
         \Magento\Checkout\Api\PaymentInformationManagementInterface $paymentInformationManagement,
         \Magento\Quote\Model\QuoteIdMaskFactory $quoteIdMaskFactory,
-        CartRepositoryInterface $cartRepository,
-        ResourceConnection $connectionPool = null
+        CartRepositoryInterface $cartRepository
     ) {
         $this->billingAddressManagement = $billingAddressManagement;
         $this->paymentMethodManagement = $paymentMethodManagement;
@@ -84,7 +78,6 @@ class GuestPaymentInformationManagement implements \Magento\Checkout\Api\GuestPa
         $this->paymentInformationManagement = $paymentInformationManagement;
         $this->quoteIdMaskFactory = $quoteIdMaskFactory;
         $this->cartRepository = $cartRepository;
-        $this->connectionPool = $connectionPool ?: ObjectManager::getInstance()->get(ResourceConnection::class);
     }

     /**
@@ -96,33 +89,23 @@ class GuestPaymentInformationManagement implements \Magento\Checkout\Api\GuestPa
         \Magento\Quote\Api\Data\PaymentInterface $paymentMethod,
         \Magento\Quote\Api\Data\AddressInterface $billingAddress = null
     ) {
-        $salesConnection = $this->connectionPool->getConnection('sales');
-        $checkoutConnection = $this->connectionPool->getConnection('checkout');
-        $salesConnection->beginTransaction();
-        $checkoutConnection->beginTransaction();
-
+        $this->savePaymentInformation($cartId, $email, $paymentMethod, $billingAddress);
         try {
-            $this->savePaymentInformation($cartId, $email, $paymentMethod, $billingAddress);
-            try {
-                $orderId = $this->cartManagement->placeOrder($cartId);
-            } catch (\Magento\Framework\Exception\LocalizedException $e) {
-                throw new CouldNotSaveException(
-                    __($e->getMessage()),
-                    $e
-                );
-            } catch (\Exception $e) {
-                $this->getLogger()->critical($e);
-                throw new CouldNotSaveException(
-                    __('An error occurred on the server. Please try to place the order again.'),
-                    $e
-                );
-            }
-            $salesConnection->commit();
-            $checkoutConnection->commit();
+            $orderId = $this->cartManagement->placeOrder($cartId);
+        } catch (\Magento\Framework\Exception\LocalizedException $e) {
+            $this->getLogger()->critical(
+                'Placing an order with quote_id ' . $cartId . ' is failed: ' . $e->getMessage()
+            );
+            throw new CouldNotSaveException(
+                __($e->getMessage()),
+                $e
+            );
         } catch (\Exception $e) {
-            $salesConnection->rollBack();
-            $checkoutConnection->rollBack();
-            throw $e;
+            $this->getLogger()->critical($e);
+            throw new CouldNotSaveException(
+                __('An error occurred on the server. Please try to place the order again.'),
+                $e
+            );
         }

         return $orderId;
diff --git a/vendor/magento/module-checkout/Model/PaymentInformationManagement.php b/vendor/magento/module-checkout/Model/PaymentInformationManagement.php
index e8ab07db184..cf29da7a13c 100644
--- a/vendor/magento/module-checkout/Model/PaymentInformationManagement.php
+++ b/vendor/magento/module-checkout/Model/PaymentInformationManagement.php
@@ -85,6 +85,9 @@ class PaymentInformationManagement implements \Magento\Checkout\Api\PaymentInfor
         try {
             $orderId = $this->cartManagement->placeOrder($cartId);
         } catch (\Magento\Framework\Exception\LocalizedException $e) {
+            $this->getLogger()->critical(
+                'Placing an order with quote_id ' . $cartId . ' is failed: ' . $e->getMessage()
+            );
             throw new CouldNotSaveException(
                 __($e->getMessage()),
                 $e