term_exists not detecting recently created terms while object cache is active

[seldimi]

Hello
Since WordPress 6.0, term_exists is using get_terms and caches functionality. Let's suppose we a foreach a loop where we need to check or create a taxonomy term on a loop. This will create 5 similar terms with name "test term". If you re-run the code, term_exists is running ok, so no more duplicates. If you delete all terms and modify for loop to 10, and run, it will create 10 instances of "test term"

That was not happening prior to 5.9 WordPress.

for ($i=0;$i<5;$i++) {
	create_term("test term","product_cat",[]);
}

function create_term($name,$taxonomy,$args  ) {
		$term = term_exists( $taxonomy_term, $taxonomy, $args['parent'] ?? 0 );

		if (0 !== $term && null !== $term) {
			$term_id = $term['term_id'];
		} else {
			$term = wp_insert_term($taxonomy_term, $taxonomy,$args);
			if (!is_wp_error($term)) {
				$term_id = $term['term_id'];
			} else {
				$term_id = null;
			}
		}
	}

Any ideas on how to fix that?

[seldimi]

To help up a bit, tried both solutions here but non worked.
https://make.wordpress.org/core/2022/04/28/taxonomy-performance-improvements-in-wordpress-6-0/

[tillkruss]

• You can disable query caching entirely in wp-core
• You can set a maxttl to let those cache keys expire
• You can not use term_exists() and run a raw database query yourself

[seldimi]

That was something that wasn't happening till 6.0, so if I got the same problem on multiple websites, more importers would do.
Can you advise on how to do the second bullet?

As a fallback, i m using renamed term_exists from WP 5.9 if REDIS is active, which is something I want to avoid.

[tillkruss]

This is a wp-core issue, nothing to do with this plugin.

As for the maxttl, please consult the README.

[seldimi]

I am trying to understand why it's core issue as it only happens when Redis is on?

[tillkruss]

WordPress is performing the cache operations. This plugin is just a link for WordPress to talk to Redis.