Preconditions (*)

  1. Install Magento 2.2.x
  2. Make custom multi-select product attribute with the source model

Steps to reproduce (*)

  1. Upgrade above magento2.2.x to magento2.3.1
  2. Reindex Data

Expected result (*)

  1. Successful reindexing should happen for all indexers.

Actual result (*)

  1. Got an error while reindexing Product EAV(catalog_product_attribute). The error which I got is:

Warning: Illegal offset type in vendor/magento/module-catalog/Model/ResourceModel/Product/Indexer/Eav/Source.php line 351

  • reset indexer => php bin/magento indexer:reset and then do again reindexing – Savan Patel May 22 at 12:06
  • Tried but no luck! – mighty_hk May 22 at 12:21

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