[jira] [Commented] (KAFKA-7382) We shoud guarantee at lest one replica of partition should be alive when create or update topic

["Eno Thereska (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-7382?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16718814#comment-16718814 ] 

Eno Thereska commented on KAFKA-7382:
-------------------------------------

Not sure I understand. Creating a topic is a control-plane operation, not a data plane operation. Why do we need to enforce that all replicas are up? It's not clear to me that we can ever fully enforce that anyway. For example, the replicas might be up when we check, and them immediately fail after the check.

> We shoud guarantee at lest one replica of partition should be alive when create or update topic
> -----------------------------------------------------------------------------------------------
>
>                 Key: KAFKA-7382
>                 URL: https://issues.apache.org/jira/browse/KAFKA-7382
>             Project: Kafka
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 0.10.2.0
>            Reporter: zhaoshijie
>            Priority: Major
>
> For example：I have brokers: 1,2,3,4,5. I create a new topic by command: 
> {code:java}
> sh kafka-topics.sh --create --topic replicaserror --zookeeper localhost:2181 --replica-assignment 11:12:13,12:13:14,14:15:11,14:12:11,13:14:11
> {code}
> Then kafkaController will process this,after partitionStateMachine and replicaStateMachine handle state change,topic metadatas and state will be strange,partitions is on NewPartition and replicas is on OnlineReplica. 
> Next wo can not delete this topic（bacase state change illegal ）,This will cause a number of problems.So i think wo shoud check replicas assignment when create or update topic.



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