Yuto Kawamura created KAFKA-3947:
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Summary: kafka-reassign-partitions.sh should support dumping
current assignment
Key: KAFKA-3947
URL: https://issues.apache.org/jira/browse/KAFKA-3947
Project: Kafka
Issue Type: Improvement
Components: tools
Affects Versions: 0.10.0.0
Reporter: Yuto Kawamura
Assignee: Yuto Kawamura
Priority: Minor
Fix For: 0.10.0.1
When I building my own tool to perform reassignment of partitions, I realized
that there's no way to dump the current partition assignment in machine
parsable format such as JSON.
Actually giving {{--generate}} option to the kafka-reassign-partitions.sh
script dumps the current assignment of topic given by
{{--topics-to-assign-json-file}} but it's very inconvenient because of:
- I want the dump containing all topics. That is, I wanna skip generating the
list of current topics to pass it to the generate command.
- The output is concatenated with the result of reassignment so can't do simply
something like: {{kafka-reassign-partitions.sh --generate ... >
current-assignment.json}}
- Don't need to ask kafka to generate reassginment to get the current
assignment in the first place.
Here I'd like to add the {{--dump}} option to kafka-reassign-partitions.sh.
I was wondering whether this functionality should be provided by
{{kafka-reassign-partitions.sh}} or {{kafka-topics.sh}} but now I think
{{kafka-reassign-partitions.sh}} should be much proper as the resulting JSON
should be in the format of {{--reassignment-json-file}} which sticks to this
command.
Will follow up the patch implements this shortly.
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