Hi,
My docker compose file is :
version: '2'
services:
zookeeper:
image: wurstmeister/zookeeper
ports:
- "2181:2181"
kafka:
image: wurstmeister/kafka
ports:
- "9092:9092"
environment:
KAFKA_ADVERTISED_HOST_NAME: lshraga-ubuntu-sp-nac
KAFKA_ADVERTISED_PORT: 9092
KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
KAFKA_NUM_PARTITIONS: 10
volumes:
- /var/run/docker.sock:/var/run/docker.sock
Basically, I increased the number of KAFKA_NUM_PARTITIONS to be 10, but I need
to do it dynamically, since I have several micro services which are consumers
and they grow and harvest in runtime dynanically.
Is there a way to change the number of pratiotns dynamically via java code?
Thanks,
Liel Shraga
ENGINEER.SOFTWARE ENGINEERING
lshr...@cisco.com
Tel: +972 2 588 6394
Cisco Systems, Inc.
32 HaMelacha St., (HaSharon Bldg) P.O.Box 8735, I.Z.Sapir
SOUTH NETANYA
42504
Israel
cisco.com
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-----Original Message-----
From: Amir Shahinpour [mailto:a...@holisticlabs.net]
Sent: Tuesday, September 19, 2017 9:07 AM
To: users@kafka.apache.org
Subject: Re: Round Robin for several consumers in KAFKA
Can you provide your docker file, or compose file?
On Wed, Sep 13, 2017 at 1:55 AM, Liel Shraga (lshraga) <lshr...@cisco.com>
wrote:
> Hi,
>
> I didn’t define the partition size. How can I do it with kafka-clients API?
>
> Thanks,
>
>
>
>
>
> Liel Shraga
> ENGINEER.SOFTWARE ENGINEERING
> lshr...@cisco.com
> Tel: +972 2 588 6394
> Cisco Systems, Inc.
> 32 HaMelacha St., (HaSharon Bldg) P.O.Box 8735, I.Z.Sapir SOUTH
> NETANYA
> 42504
> Israel
> cisco.com
>
>
> Think before you print.
> This email may contain confidential and privileged material for the
> sole use of the intended recipient. Any review, use, distribution or
> disclosure by others is strictly prohibited. If you are not the
> intended recipient (or authorized to receive for the recipient),
> please contact the sender by reply email and delete all copies of this
> message.
> Please click here for Company Registration Information.
>
>
>
> -----Original Message-----
> From: Manikumar [mailto:manikumar.re...@gmail.com]
> Sent: Wednesday, September 13, 2017 11:47 AM
> To: users@kafka.apache.org
> Subject: Re: Round Robin for several consumers in KAFKA
>
> what is the partition size? you need at least 2 partitions to
> distribute across two consumers
>
>
> On Wed, Sep 13, 2017 at 1:24 PM, Liel Shraga (lshraga)
> <lshr...@cisco.com>
> wrote:
>
> > Hi,
> >
> >
> >
> > I have 5 separate docker images : 1 for kafka broker, 1 zookeeper ,
> > 1 producer and 2 consumers.
> >
> > I publish messages to the topic via the producer.
> >
> > Basically, I would likw that the messages will be published in a
> > round robin algorithm,
> >
> > so for that purpose I defined the consumers with the same group.id
> > and added config of partition.assignment.strategy to be
> > org.apache.kafka.clients.consumer.RoundRobinAssignor,
> >
> > but actually only 1 consumer receive all the messages.
> >
> > *My Producer Code: *
> >
> > *public* *class* DiscoveryKafkaProducer{
> >
> > Producer<String, String> producer;
> >
> >
> >
> > *public* DiscoveryKafkaProducer(Properties configs) {
> >
> > producer = *new* KafkaProducer<String, String>(configs);
> >
> > }
> >
> > *public* *void* send(String topic, List<String> records) {
> >
> > *for*(String record: records){
> >
> > producer.send(*new* ProducerRecord<String,
> > String>(topic, record));
> >
> > }
> >
> > producer.flush();
> >
> > }
> >
> >
> >
> > *public* *void* close() *throws* Exception {
> >
> > producer.close();
> >
> > }
> >
> > }
> >
> >
> >
> > *My Consumer Code:*
> >
> > *public* *static* *void* main(String[] args) {
> >
> > String server = "lshraga-ubuntu-sp-nac:9092";
> >
> > Properties consumerConfigs = *new* Properties();
> >
> > consumerConfigs.put("bootstrap.servers", server);
> >
> > consumerConfigs.put("key.deserializer",
> > "org.apache.kafka.common.serialization.StringDeserializer");
> >
> > consumerConfigs.put("value.deserializer",
> > "org.apache.kafka.common.serialization.StringDeserializer");
> >
> > consumerConfigs.put("group.id", "discovery");
> >
> > consumerConfigs.put("client.id", "discovery");
> >
> > consumerConfigs.put("partition.assignment.strategy",
> > "org.apache.kafka.clients.consumer.RoundRobinAssignor");
> >
> > List<String> *list* = *new* ArrayList<String>();
> >
> > DiscoveryKafkaConsumer consumer1 = *new*
> > DiscoveryKafkaConsumer(Collections.*singletonList*(topicName),
> > consumerConfigs);
> >
> >
> >
> > *try* {
> >
> > *while* (*true*) {
> >
> > System.*out*.println("Start to consume");
> >
> > consumer1.poll(1000L);
> >
> > }
> >
> > } *catch* (InterruptedException e) {
> >
> > // *TODO* Auto-generated catch block
> >
> > e.printStackTrace();
> >
> > }
> >
> >
> >
> > *public* *class* DiscoveryKafkaConsumer {
> >
> > Consumer<String, String> consumer;
> >
> > Integer id;
> >
> > *public* DiscoveryKafkaConsumer(List<String> topics, Properties
> > configs) {
> >
> > consumer = *new* KafkaConsumer<String, String>(configs);
> >
> > consumer.subscribe(topics);
> >
> > }
> >
> >
> >
> > *public* DiscoveryKafkaConsumer(*int* i, List<String> topics,
> > Properties configs) {
> >
> > consumer = *new* KafkaConsumer<String, String>(configs);
> >
> > consumer.subscribe(topics);
> >
> > *this*.id = i;
> >
> > }
> >
> >
> >
> > *public* *void* poll(*long* timeout) *throws*
> > InterruptedException {
> >
> > ConsumerRecords<String,String> records =
> > consumer.poll(timeout);
> >
> > System.*out*.println("Hey!Consumer #" + id + "got records:" +
> > records);
> >
> > Map<String, List<String>> results = *new* HashMap<String,
> > List<String>>();
> >
> > records.forEach((cr) -> {
> >
> > System.*out*.println("cr.topic()=" + cr.topic());
> >
> > List<String> list = results.get(cr.topic());
> >
> > *if*(list == *null*) {
> >
> > list = *new* ArrayList<>();
> >
> > results.put(cr.topic(), list);
> >
> > }
> >
> > list.add(cr.value());
> >
> > System.*out*.println("list=" + list);
> >
> > });
> >
> > }
> >
> > *public* *void* close() *throws* Exception {
> >
> > consumer.close();
> >
> > }
> >
> > *What I need to add/condig in order to consume the messages in a
> > Round Robin ?*
> >
> >
> >
> >
> >
> > Thanks,
> >
> >
> >
> >
> >
> > [image: banner14]
> >
> >
> >
> > *Liel Shraga*
> >
> > ENGINEER.SOFTWARE ENGINEERING
> >
> > lshr...@cisco.com
> >
> > Tel: *+972 2 588 6394*
> >
> > *Cisco Systems, Inc.*
> >
> > 32 HaMelacha St., (HaSharon
> > <https://maps.google.com/?q=32+HaMelacha+St.,+(HaSharon&entry=gmail&
> > so
> > urce=g>
> > Bldg) P.O.Box 8735, I.Z.Sapir
> > SOUTH NETANYA
> > 42504
> > Israel
> > cisco.com
> >
> >
> >
> > [image:
> > http://www.cisco.com/assets/swa/img/thinkbeforeyouprint.gif]Think
> > before you print.
> >
> > This email may contain confidential and privileged material for the
> > sole use of the intended recipient. Any review, use, distribution or
> > disclosure by others is strictly prohibited. If you are not the
> > intended recipient (or authorized to receive for the recipient),
> > please contact the sender by reply email and delete all copies of
> > this
> message.
> >
> > Please click here
> > <http://www.cisco.com/web/about/doing_business/legal/cri/index.html>
> > for Company Registration Information.
> >
> >
> >
>
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