We mention Elasticsearch returns 429 if the circuit breaker trips in https://www.elastic.co/blog/improving-node-resiliency-with-the-real-memory-circuit-breaker, but there is no mention in the docs.
This adds an xref to circuit breaker errors section.
Co-authored-by: James Rodewig <40268737+jrodewig@users.noreply.github.com>
Co-authored-by: Luca Belluccini <luca.belluccini@elastic.co>
