Marqo persistent 429 Too Many Requests on document upload (low disk watermark)
The 429s were a symptom of a full disk: OpenSearch's DiskThresholdMonitor showed low disk watermark [85%] exceeded, which blocks indexing while reads keep working. Freeing disk space (the reporter had only ~17 GB free / 14.9%) resolved it. If Marqo returns persistent 429s on writes while searches work, check free di…
Problem outcome: unknown