[Solved] You tried to index a document with this JSON:{ "index": "users", "id": "u123", "body": { "name": "Bob" } }But the document was not saved with ID "u123". What is the likely problem? | Elasticsearch

Elasticsearch - Document Operations

You tried to index a document with this JSON:

{ "index": "users", "id": "u123", "body": { "name": "Bob" } }

But the document was not saved with ID "u123". What is the likely problem?

AThe "body" field is missing required fields.

BThe index name "users" is invalid.

CThe field "id" should be "_id" to set manual ID.

DManual IDs are not allowed in Elasticsearch.

Step-by-Step Solution

Solution:

Step 1: Check the ID field name
Elasticsearch requires "_id" (with underscore) to specify manual IDs, not "id".
Step 2: Confirm impact of wrong field
Using "id" means Elasticsearch ignores it and generates an automatic ID instead.
Final Answer:
The field "id" should be "_id" to set manual ID. -> Option C
Quick Check:
Manual ID needs "_id", not "id" [OK]

Quick Trick: Use "_id" to set manual ID, not "id" [OK]

Common Mistakes:

MISTAKES

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