CalvinConfluent commented on code in PR #18952:
URL: https://github.com/apache/kafka/pull/18952#discussion_r1962165856


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tests/kafkatest/tests/client/truncation_test.py:
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@@ -112,7 +117,10 @@ def none_consumed(this, consumer):
 
         pre_truncation_pos = consumer.current_position(tp)
 
-        self.kafka.set_unclean_leader_election(self.TOPIC)

Review Comment:
   `set_unclean_leader_election` sets the `unclean.leader.election.enable` 
config to true. It is the same if we set this config when creating the topic.
   Creating the topic with the config so that the unclean election can trigger 
by this 
[event](https://github.com/apache/kafka/pull/18952/files#diff-6cfdf3acb5e73d7f00b0319316f4c22fda76f0e7b5fff4c6bfdd2e395dc08498R115).
 In the old way, election happens 
[here](https://github.com/apache/kafka/pull/18952/files#diff-6cfdf3acb5e73d7f00b0319316f4c22fda76f0e7b5fff4c6bfdd2e395dc08498R127)
 which is no longer possible if use `wait_until` to wait for the unclean leader 
election.



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