Catalog search index issue when switching to elasticsearch

[paul_alexander]

More of a note incase anyone else has this issue or if there is a fix for the issue.

I switch the search engine from MYSQL to Elasticsearch with prompted me to reindex catalog search. After running the php72 bin/magento indexer:reindex command the catalog search was returning an unknown error whilst the search engine was set to Elasticsearch and Elasticsearch 5. Switching back to MYSQL and running the command again solved the indexing prompt. 

No idea if this is a bug or not.

[claudiamoc0226]

Sounds frustrating! If you're handling something similar for a client, maybe commercial repairing services in UK specializing in IT infrastructure could help diagnose if it's a deeper system issue.

[umairwarisc944]

Switching to Elasticsearch can cause problems with catalog search indexes. These issues may affect how quickly and accurately results appear. It's important to fix them so the search works smoothly.