reuvenlax commented on PR #28272:
URL: https://github.com/apache/beam/pull/28272#issuecomment-1722574076

   FYI - https://issues.apache.org/jira/browse/BEAM-7195 was caused by the
   inverse issue. The old code assumed that Reshuffle would produce pane
   indices, but of course it just forwards them.
   
   Let's wait until we figure out the correct behavior. Very few users will be
   exercising this from runner v2 today, so I would rather be cautious here -
   especially if the right answer is to fix runner v2.
   
   
   On Fri, Sep 15, 2023 at 3:33 AM Ahmed Abualsaud ***@***.***>
   wrote:
   
   > @reuvenlax <https://github.com/reuvenlax> as @Abacn
   > <https://github.com/Abacn> mentioned, we broke update-compatibility
   > recently in #28312 <https://github.com/apache/beam/pull/28312> so that we
   > can unblock dynamic destinations with copy jobs (#28309
   > <https://github.com/apache/beam/issues/28309>). Do we have the green
   > light to merge these changes?
   > If Dataflow folks decide Runner V2 should preserve pane indices, that
   > support may still take some time to implement. In the meantime, this
   > ensures file loads streaming works on the runner (IIUC it previously never
   > did)
   >
   > —
   > Reply to this email directly, view it on GitHub
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