<ul><li>Indices in Elasticsearch can become read_only_allow_delete due to low disk space, which prevents write operations.</li><li>Elasticsearch automatically applies a read-only block when disk usage thresholds are reached to protect cluster stability.</li><li>To fix the issue, administrators need to manually remove the read_only_allow_delete setting and adjust disk watermark settings.</li><li>This behavior is a protective mechanism in Elasticsearch, and administrators should review disk usage and thresholds to avoid future incidents.</li></ul>

Addressing read_only_allow_delete After Disk Space Issues

Discover more