Airflow db初始化后的气流2.0警告

我使用pip命令在ubuntu上部署了Airflow 2.0。已从1.10.13迁移到2.0。但在db inint之后，我得到了以下警告。请说明为什么我会收到这些警告。 我尝试运行示例DAG，它们运行成功

WARNI [airflow.providers_manager] The provider for package 'apache-airflow-providers-http' could not be registered from because providers for that package name have already been registered
WARNI [airflow.providers_manager] The provider for package 'apache-airflow-providers-sqlite' could not be registered from because providers for that package name have already been registered
WARNI [airflow.providers_manager] The provider for package 'apache-airflow-providers-imap' could not be registered from because providers for that package name have already been registered
WARNI [airflow.providers_manager] The provider for package 'apache-airflow-providers-ftp' could not be registered from because providers for that package name have already been registered
WARNI [airflow.providers_manager] The provider for package 'apache-airflow-providers-http' could not be registered from because providers for that package name have already been registered
WARNI [airflow.providers_manager] The provider for package 'apache-airflow-providers-sqlite' could not be registered from because providers for that package name have already been registered
WARNI [airflow.providers_manager] The provider for package 'apache-airflow-providers-imap' could not be registered from because providers for that package name have already been registered
WARNI [airflow.providers_manager] The provider for package 'apache-airflow-providers-ftp' could not be registered from because providers for that package name have already been registered

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我认为您有一种安装方式，即在PYTHONPATH中安装了“provider包”和带有provider的源代码。我猜您是从带有

-e

标志的源安装气流，而不是从PyPI包安装气流，在这种情况下，您将收到这些警告

顺便说一句，这些警告将在2.0.1中消失

警告是无害的，但是不使用作为软件包安装的提供程序（来自气流源的提供程序）

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其根本原因是，如果要将气流作为可编辑源安装（基本上是在您希望对气流进行贡献时），则应在安装气流之前，将

install\u PROVIDERS\u from\u sources

variable设置为

true

（请参阅）-这样您就不会从PyPI安装提供程序包。

我收到了这些相同的警告，并且我没有从源代码安装：

pip --use-deprecated legacy-resolver install "apache-airflow==${AIRFLOW_VERSION}" "apache-airflow[mysql]==${AIRFLOW_VERSION}" --constraint "${CONSTRAINT_URL}"