Please ensure that you set the desired minimum partition and replication
settings in the server.properties file. These are the ones which will be
used for auto creation of topics.
KR,
------ Original Message ------
From: "Ali Akhtar" <ali.rac...@gmail.com>
To: users@kafka.apache.org
Sent: 7/8/2017 4:27:55 PM
Subject: Re: Kafka behavior when consuming a topic which doesn't exist?
Oh gotcha, thanks. So a topic will be created if topic creation is
enabled.
On Sat, Jul 8, 2017 at 8:14 PM, M. Manna <manme...@gmail.com> wrote:
Please check my previous email.
On Sat, 8 Jul 2017 at 2:32 am, Ali Akhtar <ali.rac...@gmail.com>
wrote:
> What happens if auto creation is enabled but the topic doesn't
exist.
> Consumers subscribe to that topic which doesn't exist. Then messages
are
> posted to that topic.
>
> Will the consumer receive those messages in this scenario?
>
>
>
> On 8 Jul 2017 4:38 a.m., "M. Manna" <manme...@gmail.com> wrote:
>
> That depends.
>
> If auto creation of non-existent topic enabled (check docs), then it
will
> simple use the minimum partiotion and replication settings defined
in
> broker config to create a topic. If auto creation is disabled, your
> consumer group won't do anything.
>
> With auto creation enable - It's the same if you publish to a topic
that
> doesn't yet exist. But that means topic will get created first, and
then
> the messages are sent on the bus. If you subscribe to that topic
later
you
> will get messages. Check below:
>
> http://grokbase.com/t/kafka/users/1648kbr04c/subscribe-on-
> a-topic-that-does-not-exist
>
>
>
> On 7 Jul 2017 9:46 pm, "Ali Akhtar" <ali.rac...@gmail.com> wrote:
>
> > Sometimes I see warnings in my logs if i create a consumer for a
topic
> > which doesn't exist. Such as:
> >
> > org.apache.kafka.clients.NetworkClient - Error while fetching
metadata
> > with correlation id 1 : {example_topic=LEADER_NOT_AVAILABLE}
> >
> > If later messages are posted to that topic (which will create it),
will
> my
> > consumer receive those messages?
> >
>
