MC-22212: 1213 Deadlock found when trying to get lock

Author: dhorytskyi

app/code/Magento/Indexer/Model/ResourceModel/AbstractResource.php

@@ -11,6 +11,7 @@
 /**
  * Abstract resource model. Can be used as base for indexer resources
  *
+ * phpcs:disable Magento2.Classes.AbstractApi
  * @api
  * @since 100.0.2
  */
@@ -23,6 +24,11 @@ abstract class AbstractResource extends \Magento\Framework\Model\ResourceModel\D
      */
     protected $tableStrategy;
 
+    /**
+     * @var bool
+     */
+    private $isIsolationLevelSet = false;
+
     /**
      * Class constructor
      *
@@ -60,6 +66,20 @@ protected function _getIndexAdapter()
         return $this->getConnection();
     }
 
+    /**
+     * @inheritDoc
+     */
+    public function getConnection()
+    {
+        $connection = parent::getConnection();
+        if (!$this->isIsolationLevelSet) {
+            $connection->query('SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;');
+            $this->isIsolationLevelSet = true;
+        }
+
+        return $connection;
+    }
+
     /**
      * Get index table name with additional suffix
      *
@@ -120,8 +140,7 @@ public function insertFromTable($sourceTable, $destTable, $readToIndex = true)
     }
 
     /**
-     * Insert data from select statement of read adapter to
-     * destination table related with index adapter
+     * Insert data from select statement of read adapter to destination table related with index adapter
      *
      * @param Select $select
      * @param string $destTable