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.
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.
Kafka Standalone mode, uses Port 8084 as the Rest API post, by default. Due to this reason, if someone else is using that port already, the process with throw a BindException.
To change the port used above, navigate to the config/connect-standalone.properties file in the Kafka Root directory.
Add the following key value property to change the Port being used for Rest API opening. (Kafka should have included this in the properties file by default, else many developers go nuts trying to find the port mapping used in the standalone mode). Put a different port as you wish.
rest.port=11133
Change the port definition in config/server.properties:
# The port the socket server listens on
port=9092
来源：https://stackoverflow.com/questions/50698358/how-to-change-the-kafka-connect-component-port