Re: Ambiguous entry in docs

[Kamal <ka...@gmail.com>]

A consumer can read data from multiple topics. The above line describes the
usage of
topic regex in which an existing consumer can read data from newly (yet-to)
created topics.
For more details, see

https://kafka.apache.org/0100/javadoc/org/apache/kafka/clients/consumer/KafkaConsumer.html#subscribe(java.util.regex.Pattern,%20org.apache.kafka.clients.consumer.ConsumerRebalanceListener)



On Wed, Jan 17, 2018 at 1:29 PM, Алекс Турс <go...@gmail.com>
wrote:

> Hi.
>
> I read (mostly) all documentation top to bottom and happened to stumble
> upon passage I cannot understand. It states:
>
> https://kafka.apache.org/documentation/#impl_consumerregistration
>
> "If the consumer creates a message stream using a topic filter, it also
> registers a watch on changes (new topics being added) under the broker
> topic registry. (Each change will trigger re-evaluation of the available
> topics to determine which topics are allowed by the topic filter. A new
> allowed topic will trigger rebalancing among all consumers within the
> consumer group.)"
>
> So, what are these topic filters? And what is message stream for consumer?
> Googling on that shows couple of SO questions and rare links to streams
> api.
>
> Best regards,
>
> Alex
>