[jira] [Comment Edited] (KAFKA-12946) __consumer_offsets topic with very big partitions

["Emi (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-12946?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17363522#comment-17363522 ] 

Emi edited comment on KAFKA-12946 at 6/15/21, 10:21 AM:
--------------------------------------------------------

[~rndgstn] Interesting, it's a solution that I am going to consider. But I am more interested to know why this happen. So, why is there this very big partition in the __consumer_offsets topic? Is it really a bug of Kafka? 


was (Author: emilee):
[~rndgstn] Interesting, it could be a solution that I am going to consider. But I am more interested to know why this happen. So, why is there this very big partition in the __consumer_offsets topic? Is it really a bug of Kafka? 

> __consumer_offsets topic with very big partitions
> -------------------------------------------------
>
>                 Key: KAFKA-12946
>                 URL: https://issues.apache.org/jira/browse/KAFKA-12946
>             Project: Kafka
>          Issue Type: Bug
>          Components: log cleaner
>    Affects Versions: 2.0.0
>            Reporter: Emi
>            Priority: Critical
>
> I am using Kafka 2.0.0 with java 8u191
>  There is a partitions of the __consumer_offsets topic that is 600 GB with 6000 segments older than 4 months. Other partitions of that topic are small: 20-30 MB.
> There are 60 consumer groups, 90 topics and 100 partitions per topic.
> There aren't errors in the logs. From the log of the logcleaner, I can see that partition is never touched from the logcleaner thread for the compaction, but it only add new segments.
>  How is this possible?
> There was another partition with the same problem, but after some months it has been compacted. Now there is only one partition with this problem, but this is bigger and keep growing
> I have used the kafka-dump-log tool to check these old segments and I can see many duplicates. So I would assume that is not compacted.
> My settings:
>  {{offsets.commit.required.acks = -1}}
>  {{[offsets.commit.timeout.ms|http://offsets.commit.timeout.ms/]}} = 5000
>  {{offsets.load.buffer.size = 5242880}}
>  {{[offsets.retention.check.interval.ms|http://offsets.retention.check.interval.ms/]}} = 600000
>  {{offsets.retention.minutes = 10080}}
>  {{offsets.topic.compression.codec = 0}}
>  {{offsets.topic.num.partitions = 50}}
>  {{offsets.topic.replication.factor = 3}}
>  {{offsets.topic.segment.bytes = 104857600}}



--
This message was sent by Atlassian Jira
(v8.3.4#803005)