[jira] [Commented] (KAFKA-4795) Confusion around topic deletion

["Ismael Juma (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-4795?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16000140#comment-16000140 ] 

Ismael Juma commented on KAFKA-4795:
------------------------------------

[~vahid], supposedly you may still see this if the Controller is busy processing other requests.

> Confusion around topic deletion
> -------------------------------
>
>                 Key: KAFKA-4795
>                 URL: https://issues.apache.org/jira/browse/KAFKA-4795
>             Project: Kafka
>          Issue Type: Bug
>    Affects Versions: 0.10.2.0
>            Reporter: Vahid Hashemian
>            Assignee: Vahid Hashemian
>
> The topic deletion works like this in 0.10.2.0:
> # {{bin/zookeeper-server-start.sh config/zookeeper.properties}}
> # {{bin/kafka-server-start.sh config/server.properties}} (uses default {{server.properties}})
> # {{bin/kafka-topics.sh --zookeeper localhost:2181 --create --topic test --replication-factor 1 --partitions 1}} (creates the topic {{test}})
> # {{bin/kafka-topics.sh --zookeeper localhost:2181 --list}} (returns {{test}})
> # {{bin/kafka-topics.sh --zookeeper localhost:2181 --delete --topic test}} (reports {{Topic test is marked for deletion. Note: This will have no impact if delete.topic.enable is not set to true.}})
> # {{bin/kafka-topics.sh --zookeeper localhost:2181 --list}} (returns {{test}})
> Previously, the last command above returned {{test - marked for deletion}}, which matched the output statement of the {{--delete}} topic command.
> Continuing with the above scenario,
> # stop the broker
> # add the broker config {{delete.topic.enable=true}} in the config file
> # {{bin/kafka-server-start.sh config/server.properties}} (this does not remove the topic {{test}}, as if the topic was never marked for deletion).
> # {{bin/kafka-topics.sh --zookeeper localhost:2181 --delete --topic test}} (reports {{Topic test is marked for deletion. Note: This will have no impact if delete.topic.enable is not set to true.}})
> # {{bin/kafka-topics.sh --zookeeper localhost:2181 --list}} (returns no topics).
> It seems that the "marked for deletion" state for topics no longer exists.
> I opened this JIRA so I can get a confirmation on the expected topic deletion behavior, because in any case, I think the user experience could be improved (either there is a bug in the code, or the command's output statement is misleading).



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