Hi, I am going through the tools documentations for our own ops team. While doing so, I noticed the following note from the add partition tool:
***Please note that this tool can only be used to add partitions when data for a topic does not use a key.*** This message left me a bit dubious as to why it would affect my topics or even the producer. I don't quite follow everything that's happening in trunk but I saw the tool has been removed there and found the equivalent in kafka.admin.TopicCommand alterTopic. The message there is a bit clearer and leaves less place for questioning. >>> WARNING: If partitions are increased for a topic that has a key, the partition " + "logic or ordering of the messages will be affected" With this, I understand that adding partitions for a topic partitioned with a key will potentially affect order of messages consumed because they might end up in different partitions. This is not like adding partitions would not work :-) I would gladly update the wiki to clarify this for anyone looking for the same answer as I was. cheers, marc
