Elasticsearch - Document Operations
You have a batch of documents with manual IDs, but some IDs are duplicated in the batch. What happens when you index them all at once?
You have a batch of documents with manual IDs, but some IDs are duplicated in the batch. What happens when you index them all at once?
hard🚀 Application Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Understand how Elasticsearch handles duplicate IDs in bulk
When duplicates appear, Elasticsearch indexes documents in order; later documents overwrite earlier ones with the same ID.Step 2: Confirm behavior for duplicates
No error occurs; the last document with a duplicate ID is the final stored version.Final Answer:
Elasticsearch indexes all documents, last duplicate overwrites earlier ones. -> Option AQuick Check:
Duplicate manual IDs overwrite previous docs [OK]
Quick Trick: Last document wins when manual IDs duplicate in bulk [OK]
Common Mistakes:
MISTAKES- Expecting batch rejection on duplicates
- Thinking duplicates create multiple docs with same ID
- Assuming duplicates are ignored silently
Master "Document Operations" in Elasticsearch
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