[jira] [Commented] (KAFKA-8468) AdminClient.deleteTopics doesn't wait until topic is deleted

["Viktor Somogyi-Vass (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-8468?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16913516#comment-16913516 ] 

Viktor Somogyi-Vass commented on KAFKA-8468:
--------------------------------------------

As part of the deletion process the controller sends out requests to the brokers to delete the topics. When the response is back it stores it in its own metadata cache which is basically a cache for the zookeeper data but not always in synch with that (I guess you see where I'm going).
The deleteTopic server side code will return after the metadata has been upgraded and the topic is deleted but at this time the topic still exists in Zookeeper. Looking at the logs though I can see that a bit later it will be deleted from Zookeeper too but by then it doesn't really matter as there is a new create request which fails as per your test.

I'll see if I can make it working so that it waits until the znode deletion is also done.

> AdminClient.deleteTopics doesn't wait until topic is deleted
> ------------------------------------------------------------
>
>                 Key: KAFKA-8468
>                 URL: https://issues.apache.org/jira/browse/KAFKA-8468
>             Project: Kafka
>          Issue Type: Bug
>    Affects Versions: 2.2.0, 2.3.0, 2.2.1, 2.4.0
>            Reporter: Gabor Somogyi
>            Assignee: Viktor Somogyi-Vass
>            Priority: Major
>
> Please see the example app to reproduce the issue: https://github.com/gaborgsomogyi/kafka-topic-stress
> ZKUtils is deprecated from Kafka version 2.0.0 but there is no real alternative.
> * deleteTopics doesn't wait
> * ZookeeperClient has "private [kafka]" visibility



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