[jira] [Commented] (KAFKA-864) bin/kafka-gen-reassignment.sh

["Jun Rao (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-864?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13634292#comment-13634292 ] 

Jun Rao commented on KAFKA-864:
-------------------------------

If we just want to use a new broker to replace a failed one, a simpler solution is to just set the broker.id of the new broker to be the same as the failed one. When you restart the new broker, it will automatically replicate all missing data. No need to run the partition reassignment tool.
                
> bin/kafka-gen-reassignment.sh
> -----------------------------
>
>                 Key: KAFKA-864
>                 URL: https://issues.apache.org/jira/browse/KAFKA-864
>             Project: Kafka
>          Issue Type: Improvement
>    Affects Versions: 0.8
>            Reporter: Scott Clasen
>
> Better tooling for replacing failed brokers and reassigning partitions.  
> The output of ./bin/kafka-list-topic.sh makes doing this in bulk painful.
> Tool should output json format acceptable to ./bin/kafka-reassign-partitions.sh
> Spec: bin/kafka-gen-reassignment.sh
> Option                                  Description
> ------                                  -----------
> --topic <topic>                         REQUIRED: The topic to be reassigned.
>                                           Defaults to all existing topics.
>                                           (default: )
> --partition <partition>                REQUIRED: The partition to be reassigned.
>                                           Defaults to all partitions.
>                                           (default: )
> --from <broker-id>                    REQUIRED: The broker to reassign the partition from
> --to <broker-id>                        REQUIRED: The broker to reassign the partition to.
> --zookeeper <urls>                      REQUIRED: The connection string for
>                                           the zookeeper connection in the form
>                                           host:port. Multiple URLS can be
>                                           given to allow fail-over.
> Workflow: Replacing a broker
> ./bin/kafka-gen-reassignment.sh   --zookeeper <zks> --from <failed> --to <new>  >  reassign.json
> ./bin/kafka-reassign-partitions.sh  --zookeeper <zks> --path-to-json-file reassign.json

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