How to change the "kafka connect" component port?

Question

On port 8083 I am running Influxdb for which I am even getting the GUI on http://localhost:8083

Now come to kafka, Here I am referring the setup as per https://kafka.apache.org/quickstart

starting the zookeeeper which is in folder /opt/zookeeper-3.4.10 by the command: bin/zkServer.sh start

So zookeeper is started now starting kafka under /opt/kafka_2.11-1.1.0 folder as :
bin/kafka-server-start.sh config/server.properties

create a topic named "test" with a single partition and only one replica:
bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic test

Topic is created and can be checked in with command :
bin/kafka-topics.sh --list --zookeeper localhost:2181

Uptill here everything is fine and tuned.

Now I need to use "Kafka connect" component to import/export data. So I am creating a seed data as: echo -e "foo\nbar" > test.txt

Now using connector configuration for "kafka connect" to work : bin/connect-standalone.sh config/connect-standalone.properties config/connect-file-source.properties config/connect-file-sink.properties

after running above command I am getting : Address already in use

Kafka connect has stopped

I even changed the rest.port=8084 in the /opt/kafka_2.11-1.1.0/config/connect-distributed.properties so as it don't get conflict with influxdb which already on 8083. Still I am getting the same Address already in use, Kafka connect has stopped as shown in screenshots.

Answer 1

Since you're using Kafka Connect in Standalone mode, you need to change the REST port in config/connect-standalone.properties:

rest.port=18083

To understand more about Standalone vs Distributed you can read the doc here.