[jira] [Assigned] (KAFKA-5091) ReassignPartitionsCommand should protect against empty replica list assignment

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

     [ https://issues.apache.org/jira/browse/KAFKA-5091?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

huxi reassigned KAFKA-5091:
---------------------------

    Assignee: huxi

> ReassignPartitionsCommand should protect against empty replica list assignment 
> -------------------------------------------------------------------------------
>
>                 Key: KAFKA-5091
>                 URL: https://issues.apache.org/jira/browse/KAFKA-5091
>             Project: Kafka
>          Issue Type: Improvement
>          Components: tools
>            Reporter: Ryan P
>            Assignee: huxi
>
> Currently it is possible to lower a topics replication factor to 0 through the use of the kafka-reassign-partitions command. 
> i.e. 
> cat increase-replication-factor.json
>   {"version":1,
>   "partitions":[{"topic":"foo","partition":0,"replicas":[]}]}
> kafka-reassign-partitions --zookeeper localhost:2181 --reassignment-json-file increase-replication-factor.json --execute
> Topic:test	PartitionCount:1	ReplicationFactor:0	Configs:
> 	Topic: foo	Partition: 0	Leader: -1	Replicas: 	Isr:
> I for one can't think of a reason why this is something someone would do intentionally. That said I think it's worth validating that at least 1 replica remains within the replica list prior to executing the partition reassignment. 



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