elasticsearch concurrency_error ai_generated true

version_conflict_engine_exception: [doc_id]: version conflict, required seqNo [5], primary term [1]

ID: elasticsearch/version-conflict

Also available as: JSON · Markdown
85%Fix Rate
90%Confidence
3Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
8 active — — —

Root Cause

Optimistic concurrency control conflict. Document was modified by another process between read and write.

generic

Workarounds

  1. 92% success Implement read-modify-write with if_seq_no and if_primary_term 
    GET doc -> modify -> PUT with if_seq_no=X&if_primary_term=Y -> retry on 409

    Sources: https://www.elastic.co/guide/en/elasticsearch/reference/current/

  2. 88% success Use update API with script for atomic field updates 
    POST /index/_update/id { 'script': { 'source': 'ctx._source.count += 1' } }
  3. 85% success Add retry with exponential backoff on conflict 
    Retry the full read-modify-write cycle 3-5 times with backoff

Dead Ends

Common approaches that don't work:

  1. Disable version checking with version_type=force 85% fail

    Force overwrites silently lose concurrent updates; data corruption risk

  2. Add retry with no backoff 70% fail

    Immediate retry on conflict often hits the same conflict; needs read-modify-write cycle