Fix create_partitions sending empty assignments array instead of null - #3148
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_process_create_partitions_input always built the per-topic assignments field as a list. For the int total-count form (and a bare NewPartitions with no manual assignments) this produced an empty list [], which serialises to a present-but-empty array. The broker reads that as a manual replica assignment and rejects the request with InvalidReplicationAssignmentError. Pass assignments=None when the caller supplies no manual assignments so it serialises to null and the broker auto-assigns replicas. Add unit coverage for the auto-assign and manual-assignment paths. Fixes #3146
dpkp
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Aug 4, 2026
…#3148) Co-Authored-By: ebrard <emmanuel.brard@getyourguide.com>
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Fixes #3146
Co-authored-by: ebrard emmanuel.brard@getyourguide.com