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You tried to close an index with POST /myindex/_close but got a 404 error. What is the most likely cause?

medium📝 Debug Q14 of 15
Elasticsearch - Index Management
You tried to close an index with POST /myindex/_close but got a 404 error. What is the most likely cause?
AThe index is already closed.
BYou used the wrong HTTP method; DELETE is required.
CYou need to delete the index before closing it.
DThe index <code>myindex</code> does not exist.
Step-by-Step Solution
Solution:
  1. Step 1: Understand error causes for closing

    Closing an index fails if the index does not exist in Elasticsearch.
  2. Step 2: Check other options

    A 404 specifically indicates the index does not exist. The index is already closed. (already closed) causes a 400 error. POST is the correct method, not DELETE (B). Deleting before closing is not required (D).
  3. Final Answer:

    The index myindex does not exist. -> Option D
  4. Quick Check:

    Close error usually means index missing [OK]
Quick Trick: Close errors usually mean index missing [OK]
Common Mistakes:
MISTAKES
  • Using DELETE instead of POST
  • Thinking index must be deleted before closing
  • Assuming error means index already closed

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