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Index is locked by another process

Last update: Mon Aug 21 2023 00:00:00 GMT+0000 (Coordinated Universal Time)

CREATED FOR:

  • Developer

This article talks about a common indexing issue in Adobe Commerce where the index is locked by another process and skipped.

Affected products and versions

  • Adobe Commerce 2.X

Issue

During a full reindex in your CLI, Adobe Commerce gives you the error message: ‘Index is locked by another reindex process. Skipping.’ In other words, when the process or the index type is locked, then you cannot reindex that particular locked index type. The reindex will always skip that index type.

Cause

This error could occur if the previous index was not completed successfully. A few possible reasons are:

  • The process was interrupted by another process or user.
  • Memory limit.
  • MySQL error, like a timeout.
  • Fatal PHP error during the reindex.

Steps to Reproduce

  1. For example, say that the bash cataloginventory_stock index type is locked.
  2. When you try to reindex all data by running the CLI command bash php bin/magento indexer:reindex , you will get the following output result: bash customer_grid index has been rebuilt successfully in 00:00:09 catalog_category_product index has been rebuilt successfully in 00:00:07 catalog_product_category index has been rebuilt successfully in 00:00:00 catalogrule_rule index has been rebuilt successfully in 00:00:05 catalog_product_attribute index has been rebuilt successfully in 00:00:04 cataloginventory_stock index is locked by another reindex process. Skipping. catalog_product_price index has been rebuilt successfully in 00:00:01 catalogrule_product has been rebuilt successfully in 00:00:00 catalogsearch_fulltext index has been rebuilt successfully in 00:00:01
  3. As you can see above, the bash cataloginventory_stock index process has been skipped.

Solution

You need to reset index status, and then try to run the new reindex process. For the reset index status, you need to run the command:

bin/magento indexer:reset <index identifier>

If you are unsure what the index identifiers (code) are, you can list them using the command:

bin/magento indexer:info

For completeness, here are all possible combinations for native indexes:

bin/magento indexer:reset design_config_grid;
bin/magento indexer:reset customer_grid;
bin/magento indexer:reset catalog_category_product;
bin/magento indexer:reset catalog_product_category;
bin/magento indexer:reset catalogrule_rule;
bin/magento indexer:reset catalog_product_attribute;
bin/magento indexer:reset cataloginventory_stock;
bin/magento indexer:reset catalog_product_price;
bin/magento indexer:reset catalogrule_product;
bin/magento indexer:reset catalogsearch_fulltext;

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