Aside: I've started this new DISCUSS thread for KIP-179 since the original one had the incorrect KIP number 178. The original thread can be found here: http://mail-archives.apache.org/mod_mbox/kafka-dev/201707.mbox/%3cCAMd5YszudP+-8z5KTbFh6JscT2p4xFi1=vzwwx+5dccpxry...@mail.gmail.com%3e
I've just updated KIP-179 to support Ismael's request for the command to be able to support progress reporting of an ongoing partition reassignment. I'll call out two things which I'm not sure about since I don't yet have much experience of Kafka being used operationally: 1. As currently constructed the --progress option could report an overall progress percentage, per-partition percentages and errors. It cannot provide any kind of time-to-completion estimate. Part of me is loath to do this, as I'm sure we all remember file transfer dialogs that provide amusing/baffling time-to-completion estimates. So it might be hard to do _well_. On the other hand I expect the thing people will be interested in will often be "when will it be finished?" 2. There is no option for the tool to wait for reassignment completion. I can imagine users might want to script something to happen after the reassignment is complete, and without some kind of --wait option they will have to poll for completion "manually". Having a --wait optin and putting this polling in the tool means we have a lot more control over how often such polling happens. The KIP is available here: https://cwiki.apache.org/confluence/display/KAFKA/KIP-179+-+Change+ReassignPartitionsCommand+to+use+AdminClient Thanks, Tom
