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Mapping Conflict

Severity: High
Elasticsearch Version: 8.5.0

Problem

Indexing fails due to mapper_parsing_exception caused by conflicting field mappings

Root Cause

Conflicting field definitions for the same field across different mappings or index templates

How to Detect

Symptoms

  • Indexing errors with mapper_parsing_exception
  • Error logs indicating conflicting field types
  • Failed document ingestion

Commands

GET /<index_name>/_mapping
GET /_cat/indices?v
GET /<index_name>/_settings

Remediation Steps

  1. Identify conflicting field mappings via GET /<index_name>/_mapping
  2. Update index templates or mappings to resolve conflicts
  3. Reindex data into a new index with consistent mappings
  4. Delete or close the problematic index if necessary

Prevention

  • Implement strict mapping management and version control
  • Use dynamic templates to control field types
  • Validate mappings before index creation
  • Avoid conflicting updates to existing mappings

Production Example

curl -X GET "localhost:9200/my_index/_mapping"
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