Debezium MySQL Error: The connection password is empty - apache-kafka

Question

I have following docker-compose.yml configuration for my Debezium connector:
version: '3.1'
services:
db:
image: mysql
network_mode: host
environment:
MYSQL_ROOT_PASSWORD: 123456
volumes:
- ./mysql.cnf:/etc/mysql/conf.d/mysql.cnf
ports:
- 3306:3306
container_name: mydb
zookeeper:
image: confluentinc/cp-zookeeper
network_mode: host
ports:
- "2181:2181"
environment:
ZOOKEEPER_CLIENT_PORT: 2181
container_name: myzookeeper
kafka:
image: confluentinc/cp-kafka
network_mode: host
depends_on:
- zookeeper
- db
ports:
- "9092:9092"
environment:
KAFKA_ZOOKEEPER_CONNECT: localhost:2181
KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://localhost:9092
KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
KAFKA_BROKER_ID: 1
KAFKA_MIN_INSYNC_REPLICAS: 1
container_name: mykafka
connector:
image: debezium/connect:0.10
network_mode: host
ports:
- "8083:8083"
environment:
GROUP_ID: 1
CONFIG_STORAGE_TOPIC: my_connect_configs
OFFSET_STORAGE_TOPIC: my_connect_offsets
BOOTSTRAP_SERVERS: localhost:9092
HOST_NAME: localhost
depends_on:
- zookeeper
- db
- kafka
container_name: myconnector
When I want to create a connector I receive the following error:
curl -i -X POST -H "Accept:application/json" -H "Content-Type:application/json" localhost:8083/connectors/ -d '{ "name": "mystore-connector", "config": { "connector.class": "io.debezium.connector.mysql.MySqlConnector", "tasks.max": "1", "database.hostname": "localhost", "database.port": "3306", "database.user": "morteza", "database.password": "morteza_password", "database.server.id": "223344", "database.server.name": "dbserver1", "database.whitelist": "mystore", "database.history.kafka.bootstrap.servers": "localhost:9092", "database.history.kafka.topic": "dbhistory.mystore" } }'
HTTP/1.1 400 Bad Request
Date: Fri, 08 Mar 2019 09:48:34 GMT
Content-Type: application/json
Content-Length: 255
Server: Jetty(9.4.12.v20180830)
{"error_code":400,"message":"Connector configuration is invalid and contains the following 1 error(s):\nUnable to connect: Public Key Retrieval is not allowed\nYou can also find the above list of errors at the endpoint `/{connectorType}/config/validate`"}
And Debezium connector shows this error:
The connection password is empty [io.debezium.connector.mysql.MySqlConnector]
myconnector | 2019-03-08 09:38:26,755 INFO || Failed testing connection for jdbc:mysql://localhost:3306/?useInformationSchema=true&nullCatalogMeansCurrent=false&useSSL=false&useUnicode=true&characterEncoding=UTF-8&characterSetResults=UTF-8&zeroDateTimeBehavior=CONVERT_TO_NULL with user 'morteza' [io.debezium.connector.mysql.MySqlConnector]
I have set the value of the field database.password as you see, but I receive the error for the password of the database.

Answer 1

As Jiri Pechanec suggested, I changed image: mysql to image: mysql:5.7 in docker-compose.yml file and now it works fine.

Answer 2

This error (Public Key Retrieval is not allowed) can come about in Debezium 0.9 when the user in the source MySQL database has not been granted the required privileges. In Debezium 0.8 the error was Unable to connect: Communications link failure.
I wrote a quick blog about this here because I encountered this issue and the error messages are kinda non-obvious :)
tl;dr: ALTER USER 'debezium'#'%' IDENTIFIED WITH mysql_native_password BY 'dbz';