[jira] [Commented] (KAFKA-7236) Add --under-min-isr option to describe topics command

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-7236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16758810#comment-16758810 ] 

ASF GitHub Bot commented on KAFKA-7236:
---------------------------------------

KevinLiLu commented on pull request #6224: KAFKA-7236: Add --under-min-isr option to describe topics command (KIP-351)
URL: https://github.com/apache/kafka/pull/6224
 
 
   [KIP-351](https://cwiki.apache.org/confluence/display/KAFKA/KIP-351%3A+Add+--under-min-isr+option+to+describe+topics+command)
   
   - Add `--under-min-isr` option to `TopicCommand` to report partitions under the configured `min.insync.replicas` value
   
   *More detailed description of your change,
   if necessary. The PR title and PR message become
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   comment to ping reviewers.*
   
   *Summary of testing strategy (including rationale)
   for the feature or bug fix. Unit and/or integration
   tests are expected for any behaviour change and
   system tests should be considered for larger changes.*
   
   ### Committer Checklist (excluded from commit message)
   - [ ] Verify design and implementation 
   - [ ] Verify test coverage and CI build status
   - [ ] Verify documentation (including upgrade notes)
   
 
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> Add --under-min-isr option to describe topics command
> -----------------------------------------------------
>
>                 Key: KAFKA-7236
>                 URL: https://issues.apache.org/jira/browse/KAFKA-7236
>             Project: Kafka
>          Issue Type: Improvement
>          Components: tools
>            Reporter: Kevin Lu
>            Assignee: Kevin Lu
>            Priority: Minor
>
> The "min.insync.replicas" configuration specifies the minimum number of insync replicas required for a partition to accept messages from the producer. If the insync replica count of a partition falls under the specified "min.insync.replicas", then the broker will reject messages for producers using acks=all. These producers will suffer unavailability as they will see a NotEnoughReplicas or NotEnoughReplicasAfterAppend exception.
> We currently have an UnderMinIsrPartitionCount metric which is useful for identifying when partitions fall under "min.insync.replicas", however it is still difficult to identify which topic partitions are affected and need fixing.
> We can leverage the describe topics command in TopicCommand to add an option "--under-minisr-partitions" to list out exactly which topic partitions are below "min.insync.replicas".



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