tool · inferred from evidence
DiskThresholdMonitor
A component of OpenSearch that monitors disk space and enforces watermarks to block indexing when thresholds are exceeded.
- 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