Hii have a problem after updating from 2.6 to 2.3
Thanks for a quick answer and help.
Catalog Search indexer process unknown error:
Notice: unserialize(): Error at offset 0 of 100 bytes in /usr/local/www/apache24/xxxx/xxxxxx.com/vendor/magento/module-swatches/Helper/Data.php on line 140
I assume you mean you upgraded from 1.6.x to 2.3.x ?
If so they indexing process changed quite a bit between these versions so you may be doing it wrong if you have not updated your crons.
This should give you examples of the correct methods to run the CLI indexer on Magento 2.3.x on-wards:https://devdocs.magento.com/guides/v2.3/config-guide/cli/config-cli-subcommands-index.html#configure...