Why Apache flink in not running on Windows?

Question

I am a newbie and I am using apache flink for the first time. I have downloaded flink-1.14.4-bin-scala_2.12 version in windows, I have installed cygwin to run the sh files in windows. I have also installed java 11 on my windows 10 os.

I am following this documentation according to which I am executing the script bin/start-cluster.sh and this is shown on the cygwin terminal

Starting cluster.
Starting standalonesession daemon on host Simli.
Starting taskexecutor daemon on host Simli.

but after executing this command, the apache flink web UI is not starting at http://localhost:8081/

Am I missing something really simple here? I have also referred to this question but it seems that I have installed the correct version of java (java 11).

Answer 1

For newbie, in order to experience the new features of Flink as soon as possible in windows, and to avoid the trouble of installing the environment, I think you can try to install Docker.

Flink docker-compose.yml:

version: '2.1'
services:
  sql-client:
    user: flink:flink
    image: yuxialuo/flink-sql-client:1.13.2.v1 
    depends_on:
      - jobmanager
      - mysql
    environment:
      FLINK_JOBMANAGER_HOST: jobmanager
      MYSQL_HOST: mysql
    volumes:
      - shared-tmpfs:/tmp/iceberg
  jobmanager:
    user: flink:flink
    image: flink:1.13.2-scala_2.11
    ports:
      - "8081:8081"
    command: jobmanager
    environment:
      - |
        FLINK_PROPERTIES=
        jobmanager.rpc.address: jobmanager
    volumes:
      - shared-tmpfs:/tmp/iceberg
  taskmanager:
    user: flink:flink
    image: flink:1.13.2-scala_2.11
    depends_on:
      - jobmanager
    command: taskmanager
    environment:
      - |
        FLINK_PROPERTIES=
        jobmanager.rpc.address: jobmanager
        taskmanager.numberOfTaskSlots: 2
    volumes:
      - shared-tmpfs:/tmp/iceberg
  mysql:
    image: debezium/example-mysql:1.1
    ports:
      - "3306:3306"
    environment:
      - MYSQL_ROOT_PASSWORD=123456
      - MYSQL_USER=mysqluser
      - MYSQL_PASSWORD=mysqlpw

volumes:
  shared-tmpfs:
    driver: local
    driver_opts:
      type: "tmpfs"
      device: "tmpfs"

Then start the Flink component in the current directory where the docker-compose.yml file is located.

docker-compose up -d

This command will automatically start all the containers defined in the Docker Compose configuration in detached mode.

You can check if Flink is running properly by visiting: http://localhost:8081/

You can also search for the Flink version of the image you want on DockerHub?https://hub.docker.com/r/apache/flink/tags