Reindex and unique identification


Had a question about reindexing. I executed these steps

  1. Create a new index
  2. Reindex to the new index
  3. Did wait for 2nd step to complete then started adding more documents to the new index through logstash

In logstash I defined a unique document id . At the time of reindex, there were duplicates in source. Does at any point of time , the destination index remove the duplicates on its own (which were copied as part of step 2) ??

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