Troubleshooting Elasticsearch searches, for Beginners by Alex Brasetvik.
From the post:
Elasticsearch’s recent popularity is in large part due to its ease of use. It’s fairly simple to get going quickly with Elasticsearch, which can be deceptive. Here at Found we’ve noticed some common pitfalls new Elasticsearch users encounter. Consider this article a piece of necessary reading for the new Elasticsearch user; if you don’t know these basic techniques take the time to familiarize yourself with them now, you’ll save yourself a lot of distress.
Specifically, this article will focus on text transformation, more properly known as text analysis, which is where we see a lot of people get tripped up. Having used other databases, the fact that all data is transformed before getting indexed can take some getting used to. Additionally, “schema free” means different things for different systems, a fact that is often confused with Elasticsearch’s “Schema Flexible” design.
When Alex say “beginners” he means beginning developers so this isn’t a post you can send to users with search troubles.
Sorry!
But if you are trying to debug search results in ElasticSearch as a developer, this is a good place to start.