elasticsearch resource_error ai_generated true

ClusterBlockException: index has read-only-allow-delete block due to disk watermark

ID: elasticsearch/disk-watermark-exceeded

Also available as: JSON · Markdown
82%Fix Rate
86%Confidence
3Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
8 active — — —

Root Cause

Disk usage exceeded flood-stage watermark, index locked.

generic

Workarounds

  1. 90% success Free disk space: delete old indices, merge segments, or add storage
  2. 88% success Reset block after cleanup: PUT index/_settings {"index.blocks.read_only_allow_delete":null}

Dead Ends

Common approaches that don't work:

  1. Remove read_only_allow_delete block without freeing space 85% fail

    Block returns immediately

  2. Disable disk watermarks 88% fail

    Node fills disk and crashes