How to Fix: Elasticsearch error: cluster_block_exception [FORBIDDEN/12/index read-only / allow delete (api)], flood stage disk watermark exceeded
Elasticsearch error: cluster_block_exception due to disk watermark exceeded. Increase disk space or delete unnecessary data to resolve the issue.
📋 Table of Contents
Elasticsearch error: cluster_block_exception [FORBIDDEN/12/index read-only / allow delete (api)], flood stage disk watermark exceeded occurs when the Elasticsearch cluster's disk space is low, causing all indices on a node to be marked as read-only. This issue can be resolved by increasing the disk space of the Elasticsearch node or by optimizing the cluster's settings.
⚠️ Common Causes
- Low disk space on Elasticsearch node
🚀 How to Resolve This Issue
Method 1: Increase Disk Space
- Step 1: Check the disk usage of the Elasticsearch node and increase its size if necessary.
Method 2: Optimize Cluster Settings
- Step 1: Check the Elasticsearch configuration and adjust settings such as the disk watermark threshold or the index block size.
💡 Conclusion
To avoid this issue in the future, regularly monitor the Elasticsearch cluster's disk space and adjust the settings accordingly. Additionally, consider implementing a monitoring system to detect potential issues before they become critical.
❓ Frequently Asked Questions
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