You can use the KafkaConsumer#assignment() method to get all the assigned topic-partitions for that consumer instance. But, you've to periodically call poll method to get the latest assignment which may return records. This shortcoming is actively discussed in the below threads.
https://mail-archives.apache.org/mod_mbox/kafka-dev/201908.mbox/<08030a68-3f0b-42db-9b79-dfcd3200cf25%40www.fastmail.com> <https://mail-archives.apache.org/mod_mbox/kafka-dev/201908.mbox/%3C08030a68-3f0b-42db-9b79-dfcd3200cf25%40www.fastmail.com%3E> https://cwiki.apache.org/confluence/display/KAFKA/KIP-505%3A+Add+new+public+method+to+only+update+assignment+metadata+in+consumer https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=97551484 On Mon, Aug 19, 2019 at 6:33 PM M. Manna <manme...@gmail.com> wrote: > Kafka doesn’t have regex subscription. You could get a list of available > topic using admin client. From there, you can decide what topics you would > like to subscribe to (or process using your logic). > > Check documentation for AdminClient.listTopics and ListTopicResult holder. > > I hope this helps. > > Regards, > > On Mon, 19 Aug 2019 at 13:22, Upendra Yadav <upendra1...@gmail.com> wrote: > > > Hi, > > I have initialised kafka consumer: > > KafkaConsumer<byte[], byte[]> consumer = new KafkaConsumer<byte[], > > byte[]>(consumerConfig); > > > > and subscribed with topic pattern: > > consumer.subscribe(Pattern.compile(topicRegex), listener); > > > > now, I'm trying to get the list of topics. > > Map<String, List<PartitionInfo>> topicsPartitions = > consumer.listTopics(); > > > > here topic list is not following given pattern. it is giving all topic > > list. > > Is this expected behaviour? Is there any API to get subscribed topic list > > with consumer instance? > > or Do I need to write simple prog to process this list with same pattern? > > >
