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  1. Nuxeo Platform
  2. NXP-13368

Drive: locally updating the content of a file and remotely updating some property on the document concurrently causes a conflict

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    • Backlog priority:
      800

      Description

      This is easy to reproduce:
      Update the dc:description metadata on a remote doc while concurrently modifying the local content of a file within the same sync batch (easy to do with a long delay, or if the local scan takes a long time).

      The problem is due to the way we detect remote changes, using the last modification date, which is updated when changing a metadata. In the case where the file has not been modified locally, it is not a problem, we will see in the logs something like "No local impact of metadata update on document XXX". But in the case where a local change has occurred, the resulting pair state from (local_state='modified', remote_state='modified') is 'conflicted'.

      This is due to the way we handle the remote information sent by the server in Model.update_remote().
      We need to mark a pair as 'modified' in a certain number of cases, typically if its content has changed, if it is a folder newly registered as a synchronization root by some user, if security has changed, etc. but not necessarily in the case of a simple metadata update.

      So we need to specify how we want to handle this use case and deal with it.

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