Hot to get all document _id of an elasticsearch index

I am trying to pull list of all doc_ids in Elasticsearch index. the index contains 15 million docs, I am only interested in doc_id. I have set search query in java by setting "size" parameter to 15 million, but i got exception the maximum size is "10000". any idea how i can achieve this task?

I am using simple httpPost request to submit the query as follows:

"stored_fields": ["","au.doc_count"],
"query": {
"match_all": {}

Hi @telebh,

you should be able to pull out all the ids using a scroll search, see:

Yes, that worked out. thank you Henning!

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