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From John Holland <john.holl...@objectpartners.com>
Subject Re: kafka 0.8.2.2 delete topic issue
Date Wed, 03 Feb 2016 17:01:19 GMT
I just ran into this issue in our load environment, unfortunately I came up
with the same options outlined above.  Any better solutions would be most
appreciated otherwise I'm now considering the use of delete topic in any
critical environment off the table.

On Wed, Feb 3, 2016 at 10:10 AM Ivan Dyachkov <dev@dyachkov.org> wrote:

> Hi!
>
> We're running cluster of 3 kafka-0.8.2.2 nodes and delete.topic.enable is
> set to true on all nodes.
>
> Today we tried to delete one of the topics. I waited ~20 minutes after the
> kafka-topics.sh --delete was executed but the topic was still there.
>
> --describe showed Leader: -1 and only one of three brokers (1, 2 or 3) in
> ISR for all partitions.
>
> The topic had the following configuration:
> partitions: 50
> replication factor: 3
> unclean.leader.election.enable: false
> min.insync.replicas: 2
>
> Then I restarted one of the nodes with the hope to trigger retry on topic
> deletion. After that things went nuts and we had short cluster downtime
> before I managed to recover it and get to the same point when we were
> before the restart. The topic was still there.
>
> Since we successfully deleted topics before on the same cluster some time
> ago, the only thing which could be different is someone could hold an open
> connection or a consumer group linked to the topic. According to previous
> similar issues described in this group this could make topic deletion to
> fail. We had shut down the service responsible for this topic, triggered
> preferred replica election, but that didn't help. Also we set
> retention.bytes topic config to 1, waited for retention.interval.ms,
> nothing changed.
>
> The only option to recover which we see is shut down all nodes, delete the
> topic from file system, remove the topic from zookeeper on /config/topics/
> and /admin/delete_topics and start the nodes again.
>
> So my question is really is it possible to recover from this situation,
> either cancel topic deletion or finally delete it, without cluster downtime?
>
> Thanks.
>
> /Ivan
>

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