Magento – Magento 2 : Not able to place order. Error is following

magento2

[2018-08-21 12:16:02] main.CRITICAL: Rolled back transaction has not
been completed correctly. {"exception":"[object] (Exception(code: 0):
Rolled back transaction has not been completed correctly. at
/home/groceryp/www.tripochure.com/bikeon/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php:270)"}
[]

Best Answer

We have been experiencing this issue across all of our Magento 2 sites. For us, switching off persistent cart (Store > Configuration > Customer > Persistent Shopping Cart) solved the issue. I really hope Magento can fix persistent cart, though, as we'd like to be able to use it again.

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