16pierre commented on issue #17334:
URL: https://github.com/apache/datafusion/issues/17334#issuecomment-3234493420

   > I think some specific timing can cause the non-spillable operators to OOM, 
however if spillable operators can spill earlier, the execution should be 
possible to finish
   
   I could definitely foresee race-conditions being possible, but I can also 
imagine deterministic failures. For example in case of a single partition: we 
deterministically fill up memory with the batches to sort, and let's say we get 
to the point where we need one more batch to trigger sort spilling. At this 
point the non-spillable input operator needs to allocate memory to provide that 
last batch, and errors because no enough memory available.


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