The impact is pretty clear. Below we load ten events using a given key. We add a partition, then load ten more events. Notice the partition differs after adding a partition, even though the key is the same.<\/p>\n\n\n\n
Steve-Howards-MBP13:confluent-5.1.2 steve.howard$ for i in {1..10}; do java ProducerDemo 2>\/dev\/null | grep Partition; done | sort | uniq -c\n 10 Partition:1\nSteve-Howards-MBP13:bin steve.howard$ .\/kafka-topics --zookeeper localhost:2181 --topic bar --alter --partitions 4\nWARNING: If partitions are increased for a topic that has a key, the partition logic or ordering of the messages will be affected\nAdding partitions succeeded!\nSteve-Howards-MBP13:confluent-5.1.2 steve.howard$ for i in {1..10}; do java ProducerDemo 2>\/dev\/null | grep Partition; done | sort | uniq -c\n 10 Partition:0\nSteve-Howards-MBP13:confluent-5.1.2 steve.howard$ <\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"The impact is pretty clear. Below we load ten events using a given key. We add a partition, then load ten more events. Notice the partition differs after adding a partition, even though the key is the same.<\/p>\n