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https://issues.apache.org/jira/browse/KAFKA-329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13294046#comment-13294046
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Prashanth Menon edited comment on KAFKA-329 at 6/13/12 1:21 AM:
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Hi Jun,

New patch with your changes incorporated.  I think it's functionally complete, 
but I may have missed some things.  

As for a json library, I'm not sure what plays well specifically with Scala, 
though I suspect most basic Java json libs should be fine.  I personally have 
experience with Jackson which has a nice Scala wrapper lib called Jerkson 
(https://github.com/codahale/jerkson).  There is also Lift-JSON, but I'm not 
familiar with though I've heard good things from people.  Perhaps integrating a 
JSON lib can be part of a separate JIRA?
                
      was (Author: prashanth.menon):
    Hi Jun,

New patch with your changes incorporated.  I think it's functionally complete, 
but I may have missed some things.  

As for a JSON library, I'm not sure what plays well specifically with Scala, 
though I suspect basic Java libs should suffice.  I personally have experience 
with Jackson which has a nice Scala wrapper lib called Jerkson 
(https://github.com/codahale/jerkson).  There is also Lift-JSON, but I'm not 
familiar with though I've heard good things from people.  Perhaps integrating a 
JSON lib can be part of a separate JIRA?
                  
> Remove the watches/broker for new topics and partitions and change create 
> topic admin API to send start replica state change to all brokers
> -------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: KAFKA-329
>                 URL: https://issues.apache.org/jira/browse/KAFKA-329
>             Project: Kafka
>          Issue Type: Sub-task
>    Affects Versions: 0.8
>            Reporter: Neha Narkhede
>            Assignee: Prashanth Menon
>              Labels: replication
>         Attachments: KAFKA-329-DRAFT-v2.patch, KAFKA-329-DRAFT.patch, 
> KAFKA-329-v1.patch
>
>
> Currently in 0.8, all brokers register a watch on /brokers/topics and 
> /brokers/topics/[topic] for all topics in a Kafka cluster. The watches are 
> required to discover new topics. 
> There is another way this can be achieved, as proposed here - 
> https://cwiki.apache.org/confluence/display/KAFKA/Kafka+replication+detailed+design+V2#KafkareplicationdetaileddesignV2-Createtopic
> Basically, the create-topic admin command sends start-replica state change 
> request to all brokers in the assigned replicas list.

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