- title: "Non-standard default Redis ports are no longer supported"
  announcement_milestone: "15.8"
  removal_milestone: "16.0"
  breaking_change: true
  reporter: marcogreg
  stage: platforms  # (required) String value of the stage that the feature was created in. e.g., Growth
  issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/388269
  body: |
    If GitLab starts without any Redis configuration file present,
    GitLab assumes it can connect to three Redis servers at `localhost:6380`,
    `localhost:6381` and `localhost:6382`. We are changing this behavior
    so GitLab assumes there is one Redis server at `localhost:6379`.

    If you want to keep using the three servers, you must configure
    the Redis URLs by editing the `config/redis.cache.yml`,`config/redis.queues.yml`,
    and `config/redis.shared_state.yml` files.