[jira] [Commented] (KAFKA-12751) ISRs remain in in-flight state if proposed state is same as actual state

[Rajini Sivaram (Jira)]

[ 
https://issues.apache.org/jira/browse/KAFKA-12751?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17414212#comment-17414212
 ] 

Rajini Sivaram commented on KAFKA-12751:


The bug only happens in an unusual case where the proposed ISR is the same as 
the expected ISR and the chances of hitting that are very low. And it is an 
issue only if `inter.broker.protocol.version >= 2.7`. If it does occur, further 
ISR updates don't occur, so the broker will need to be restarted. Release plan 
for 2.8.1 is here: 
[https://cwiki.apache.org/confluence/display/KAFKA/Release+Plan+2.8.1,] work is 
under way and the release is expected in within the next few weeks.

> ISRs remain in in-flight state if proposed state is same as actual state
> 
>
> Key: KAFKA-12751
> URL: https://issues.apache.org/jira/browse/KAFKA-12751
> Project: Kafka
>  Issue Type: Bug
>  Components: core
>Affects Versions: 2.7.0, 2.8.0, 2.7.1
>Reporter: Rajini Sivaram
>Assignee: Rajini Sivaram
>Priority: Critical
> Fix For: 2.7.2, 2.8.1
>
>
> If proposed ISR state in an AlterIsr request is the same as the actual state, 
> Controller returns a successful response without performing any updates. But 
> the broker code that processes the response leaves the ISR state in in-flight 
> state without committing. This prevents further ISR updates until the next 
> leader election.



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[jira] [Commented] (KAFKA-12751) ISRs remain in in-flight state if proposed state is same as actual state

[priya Vijay (Jira)]

[ 
https://issues.apache.org/jira/browse/KAFKA-12751?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17414181#comment-17414181
 ] 

priya Vijay commented on KAFKA-12751:
-

[~rsivaram] We are currently using kafka 2.8  in production. Can you please let 
me know what are the impacts of this bug?

also, when will 2.8.1 be released?

appreciate your guidance on this

thanks

Priya Vijay

> ISRs remain in in-flight state if proposed state is same as actual state
> 
>
> Key: KAFKA-12751
> URL: https://issues.apache.org/jira/browse/KAFKA-12751
> Project: Kafka
>  Issue Type: Bug
>  Components: core
>Affects Versions: 2.7.0, 2.8.0, 2.7.1
>Reporter: Rajini Sivaram
>Assignee: Rajini Sivaram
>Priority: Critical
> Fix For: 2.7.2, 2.8.1
>
>
> If proposed ISR state in an AlterIsr request is the same as the actual state, 
> Controller returns a successful response without performing any updates. But 
> the broker code that processes the response leaves the ISR state in in-flight 
> state without committing. This prevents further ISR updates until the next 
> leader election.



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