Magento 2 Dummy view does not exist?

Question

When I run php bin/magento setup:upgrade and when task finished, at the last line, it shows

This also happened if I run

php bin/magento indexer:reindex customer_grid

and reindex always failed with

dummy view does not exist

---

If I go to Admin -> system -> index management, I'll see this error,

1 exception(s):
Exception #0 (InvalidArgumentException): dummy view does not exist.

Exception #0 (InvalidArgumentException): dummy view does not exist.
#0 /public/vendor/magento/module-indexer/Model/Indexer.php(238): Magento\Framework\Mview\View->load('dummy')
#1 /public/vendor/magento/module-indexer/Model/Indexer.php(276): Magento\Indexer\Model\Indexer->getView()
#2 /public/vendor/magento/module-indexer/Model/Indexer/DependencyDecorator.php(180): Magento\Indexer\Model\Indexer->isScheduled()
#3 /public/vendor/magento/module-indexer/Ui/DataProvider/Indexer/DataCollection.php(51): Magento\Indexer\Model\Indexer\DependencyDecorator->isScheduled()
#4 /public/vendor/magento/framework/Data/Collection.php(688): Magento\Indexer\Ui\DataProvider\Indexer\DataCollection->loadData(false, false)
#5 /public/vendor/magento/framework/Data/Collection.php(284): Magento\Framework\Data\Collection->load()
#6 /public/vendor/magento/module-backend/view/adminhtml/templates/widget/grid.phtml(51): 

Magento\Framework\Data\Collection->getSize()
.......

Answer 1

I would suggest that this is probably related to a misconfigured custom indexer. Take a look at Magento 2: Add custom attributes to customer grid