How to fix Elastic Search Index error (FORBIDDEN/12/index read-only / allow delete (api))

I’ll show you how to fix Elastic Search error.

[403] {"error":{"root_cause":[{"type":"cluster_block_exception","reason":"blocked by: [FORBIDDEN/12/index read-only / allow delete (api)];"}],"type":"cluster_block_exception","reason":"blocked by: [FORBIDDEN/12/index read-only / allow delete (api)];"}

This is due to system’s disk space problem. So it’s better to free up disk space first.

curl -XPUT -H "Content-Type: application/json" http://localhost:9200/_all/_settings -d '{"index.blocks.read_only_allow_delete": null}'

https://stackoverflow.com/questions/50609417/elasticsearch-error-cluster-block-exception-forbidden-12-index-read-only-all