nickva commented on pull request #3909:
URL: https://github.com/apache/couchdb/pull/3909#issuecomment-1018659332


   We should be specific that this affects the `new_edits:true` _and_ VDU pass 
corner case, and explicitly check that other replies all `noreply` (meaning VDU 
passed or VDU might have failed but we just didn't extended the revision tree 
so it returned a pass).
   
   In other words, we'd assert that there is at least one forbidden error (and 
all the rest of forbidden should match) and all the other responses are 
`noreply`.
   
   Another thing to check is if the replicator knows how to handle 202 
responses from `new_edits:false` _bulk_docs requests. It looks like previously 
we might have never returned 202 response due to:
   
   
https://github.com/apache/couchdb/blob/3.x/src/fabric/src/fabric_doc_update.erl#L149-L150
   
   ```erlang
   case [Reply || {ok, Reply} <- Replies]
       [] ->
   ```
   
   So there is a high chance replicator would not expect it and consider it an 
error.
   
   Even if our (CouchDB) replicator would work, there is a chance PouchDB or 
other implementations might break.  So I would lean towards staying with 
returning a 201 for this mode. What do you think?


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