[
https://issues.apache.org/jira/browse/KAFKA-2350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14638063#comment-14638063
]
Jiangjie Qin commented on KAFKA-2350:
-------------------------------------
Yes, that is what I meant.
Isn't it the case that subscribe(partition) always check the if
subscribe(topic) has been called or not?
If user wants to subscribe/unsubscribe to an illegal partition, I kind of think
it is easy to understand that we just throw exception and say "Consumer is
using Kafka based offset assignment and topic partition tp is not an assigned
partition."
> Add KafkaConsumer pause capability
> ----------------------------------
>
> Key: KAFKA-2350
> URL: https://issues.apache.org/jira/browse/KAFKA-2350
> Project: Kafka
> Issue Type: Improvement
> Reporter: Jason Gustafson
> Assignee: Jason Gustafson
>
> There are some use cases in stream processing where it is helpful to be able
> to pause consumption of a topic. For example, when joining two topics, you
> may need to delay processing of one topic while you wait for the consumer of
> the other topic to catch up. The new consumer currently doesn't provide a
> nice way to do this. If you skip poll() or if you unsubscribe, then a
> rebalance will be triggered and your partitions will be reassigned.
> One way to achieve this would be to add two new methods to KafkaConsumer:
> {code}
> void pause(String... topics);
> void unpause(String... topics);
> {code}
> When a topic is paused, a call to KafkaConsumer.poll will not initiate any
> new fetches for that topic. After it is unpaused, fetches will begin again.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
