adrienverge commented on issue #1418: BUG: Recreating deleted document can break replication when VDU function is active URL: https://github.com/apache/couchdb/issues/1418#issuecomment-474311302 This is an interesting edge case indeed! I also experience the bug on CouchDB 2. My understanding is that it happens in this particular case: - **step A:** document is non-deleted, and correctly replicated :heavy_check_mark: ``` first rev latest rev on source ↘ ↙ SOURCE SERVER o----o----o TARGET SERVER o----o----o ↖ latest rev on target ``` - **step B:** document is deleted, and correctly replicated :heavy_check_mark: ``` first rev tombstone rev (latest rev on source) ↘ ↙ SOURCE SERVER o----o----o----x TARGET SERVER o----o----o----x ↖ tombstone rev (latest rev on target) ``` - **step C:** document is re-created on source, but **not replicated** :warning: ``` tombstone rev first rev (last common ancestor) latest rev on source ↘ ↓ ↙ SOURCE SERVER o----o----o----x----o----o----o----o TARGET SERVER o----o----o----x ↖ tombstone rev (latest rev on target) ```
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