[ https://issues.apache.org/jira/browse/KAFKA-13226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17435380#comment-17435380 ]
shizhenzhen edited comment on KAFKA-13226 at 11/1/21, 2:40 AM: --------------------------------------------------------------- I hava push a PR, please review it https://github.com/apache/kafka/pull/11453 was (Author: shizhenzhen): I hava push a PR, please review it https://github.com/apache/kafka/pull/11445 > Partition expansion may cause uneven distribution > ------------------------------------------------- > > Key: KAFKA-13226 > URL: https://issues.apache.org/jira/browse/KAFKA-13226 > Project: Kafka > Issue Type: Bug > Components: controller > Affects Versions: 2.5.0, 2.8.0, 2.7.1, 2.6.2, 2.8.1, 3.0.0 > Environment: mac > kafka-2.5.0 > Reporter: shizhenzhen > Priority: Major > > > {color:#ff0000}*Partition expansion may cause uneven distribution*{color} > > 1. Create a Topic , 3-partition 1-replical > !https://img-blog.csdnimg.cn/561112064b114acfb03882aa09100e0e.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_Q1NETiBA55-z6Ie76Ie755qE5p2C6LSn6ZO6,size_55,color_FFFFFF,t_70,g_se,x_16! > > 2. partition expansion to 5 - partiton > !https://img-blog.csdnimg.cn/f7c3c33b6662457080d9bb5bb190c0c2.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_Q1NETiBA55-z6Ie76Ie755qE5p2C6LSn6ZO6,size_49,color_FFFFFF,t_70,g_se,x_16! > > 3. Does this meet expectations ? > > !https://img-blog.csdnimg.cn/20cc1007c4214c4ebfcb1b2c2eeb98e4.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_Q1NETiBA55-z6Ie76Ie755qE5p2C6LSn6ZO6,size_18,color_FFFFFF,t_70,g_se,x_16! > > {color:#ff0000}*so this is a bug ?*{color} > > The problem may arise here ; > When we create a new topic . get the broker list is a Object Map ; > *This is disordered* > you can read the code , first it have sortBy brokerId, but finally it convert > to a *disorde Map;* > > > !https://img-blog.csdnimg.cn/131b9bf0c19e4753a73512af4c9c5854.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_Q1NETiBA55-z6Ie76Ie755qE5p2C6LSn6ZO6,size_66,color_FFFFFF,t_70,g_se,x_16! > > > > The important thing is that it has been sorted when expanding the partition > and parition-reassignment ; > {color:#ff0000}*So why not sort when creating topics?*{color} > > If the topic is sorted when create a new topic , this problem will not occur > ; > > so it maybe is a tiny bug ? > > > if you can read Chinese , > You can look at this article. I describe it in detail > > We look forward to receiving your reply > > 如果你能看懂中文,可以看看这篇文章 我描述的很详细! > [This may be a Kafka > bug?|[https://shirenchuang.blog.csdn.net/article/details/119912418]] > > -- This message was sent by Atlassian Jira (v8.3.4#803005)