Docker-compose 和容器上的竞争条件取决于其他容器

Question

I have docker-compose which will start multiple containers of Java SpringBoot microservices and one of them, which depends on two others, will fail to start with something like race condition:

Exception thrown from ApplicationListener handling ContextClosedEvent

org.springframework.beans.factory.BeanCreationNotAllowedException: Error creating bean with name 'rabbitConnectionFactory': Singleton bean creation not allowed while singletons of this factory are in destruction (Do not request a bean from a BeanFactory in a destroy method implementation!)

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:208)

When I will stop it and run it manually it will pick up. When docker-compose will have set restart: on-failure for that service it will pick up on 3rd restart.

Any tips how to handle such of problem?

Answer 1

Please see chapter 7.4 here, it really works: https://cloud.spring.io/spring-cloud-config/multi/multi__spring_cloud_config_client.html

Answer 2

Usually, depends_on is enough. Nevertheless, sometimes it may not work properly. Once I heard about this issue and the recommendation was to use the healthcheck docker option, available at docker v2.3. See guide here .

I am adding an example using a healthcheck to guarantee the database is up. So, only after the healthcheck is ok, they will startup the other apps.

[...]
healthcheck:
  test: ["CMD-SHELL", 'mysql -uroot --database=<db-name> --password=<password> --execute="SELECT 
  count(table_name) > 0 FROM information_schema.tables;" --skip-column-names -B']
  interval: 10s
  timeout: 10s
  retries: 4