Lower the replication factor for transactions topic on @EmbeddedKafka Test #3602
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Fixes: #3557
Expected Behavior
It would be nice if the embedded broker started by @embeddedkafka (or the similar JUnit Rule) defaulted the replication factor for the transaction state topic to the number of brokers, or a min(, 3).
Current Behavior
The embedded broker starts with the default configuration of transaction.state.log.replication.factor = 3 which doesn't make sense for a single-broker cluster, which is quite common in tests:
Fix