Re[2]: Kafka behavior when consuming a topic which doesn't exist?

["M. Manna" <ma...@gmail.com>]

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" <al...@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 <ma...@gmail.com> wrote:
>
>>Please check my previous email.
>>
>>On Sat, 8 Jul 2017 at 2:32 am, Ali Akhtar <al...@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" <ma...@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" <al...@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?
>> > >
>> >
>>