>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3526329. --> Reported by: [damienmckenna](https://www.drupal.org/user/108450) Related to !7 >>> <h3 id="summary-problem-motivation">Problem/Motivation</h3> <p>It isn't possible to save a Search API using Opensearch as the AI backend, it gives this error:</p> <blockquote><p>An error occurred: "OpenSearch error: mapper_parsing_exception - Failed to parse mapping [_doc]: nmslib engine is deprecated in OpenSearch and cannot be used for new index creation in OpenSearch from 3.0.0. - Request: PUT <a href="http://opensearch:9200/mysite_ai">http://opensearch:9200/mysite_ai</a> - Body: {"settings":{"index":{"number_of_shards":1,"number_of_replicas":1,"knn":true,"max_result_window":20000}},"mappings":{"properties":{"vector":{"type":"knn_vector","dimension":2,"method":{"name":"hnsw","space_type":"innerproduct","engine":"nmslib","parameters":{"ef_construction":128,"m":16}}}}}}"</p></blockquote> <h4 id="summary-steps-reproduce">Steps to reproduce</h4> <p>Set up OpenSearch 3 on the server.<br> Go through the process to set up a index.<br> When saving an AI search_api index with OpenSearch, it will fail.</p> <h3 id="summary-proposed-resolution">Proposed resolution</h3> <p>Make the module compatible with Opensearch 3.</p> <h3 id="summary-remaining-tasks">Remaining tasks</h3> <p>Fix the API issues.</p> <h3 id="summary-ui-changes">User interface changes</h3> <p>TBD</p> <h3 id="summary-api-changes">API changes</h3> <p>TBD</p> <h3 id="summary-data-model-changes">Data model changes</h3> <p>TBD</p>