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

["Vahid Hashemian (JIRA)" <ji...@apache.org>]

Vahid Hashemian created KAFKA-4795:
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             Summary: 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 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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