Apache Beam：无法找到gs的注册商

Beam is using both Google's auto/value and auto/service tools.

Beam正在使用Google的自动/价值和自动/服务工具。

I want to run a pipeline with Dataflow runner and data is stored on Google Cloud Storage.

我想运行带有Dataflow流水线的管道，数据存储在Google云端存储上。

I've added a dependencies:

我添加了一个依赖项：

<dependency>
    <groupId>org.apache.beam</groupId>
    <artifactId>beam-runners-google-cloud-dataflow-java</artifactId>
    <version>2.0.0</version>
</dependency>

<dependency>
    <groupId>org.apache.beam</groupId>
    <artifactId>beam-sdks-java-extensions-google-cloud-platform-core</artifactId>
    <version>2.0.0</version>
</dependency>

I'm able to start the pipeline from the IntelliJ. But when the jar is compiled through a mvn package and run with java -jar it throws an error:

我能够从IntelliJ启动管道。但是当jar通过mvn包编译并使用java -jar运行时会抛出一个错误：

java.lang.IllegalStateException: Unable to find registrar for gs

The fatjar is package with maven-assembly-plugin. GcsFileSystemRegistrar class is in the jar.

fatjar是包含maven-assembly-plugin的包。 GcsFileSystemRegistrar类在jar中。

2 个解决方案

#1

The issue is in the way that you are building your fatjar. The maven-assembly-plugin is not handling files associated with ServiceLoader correctly. ServiceLoader relies on entries being listed within META-INF/services/org.apache.beam.sdk.io.FileSystemRegistrar for each implementation so that Java knows how to find them.

问题在于你正在构建你的fatjar。 maven-assembly-plugin没有正确处理与ServiceLoader关联的文件。 ServiceLoader依赖于META-INF / services / org.apache.beam.sdk.io.FileSystemRegistrar中列出的每个实现的条目，以便Java知道如何找到它们。

The contents of the META-INF/services/org.apache.beam.sdk.io.FileSystemRegistrar in your fatjar is likely only:

你的fatjar中的META-INF / services / org.apache.beam.sdk.io.FileSystemRegistrar的内容可能只是：

org.apache.beam.sdk.io.LocalFileSystemRegistrar

You need to have it list (and any other implementations that you want):

您需要拥有它（以及您想要的任何其他实现）：

org.apache.beam.sdk.io.LocalFileSystemRegistrar
org.apache.beam.sdk.extensions.gcp.storage.GcsFileSystemRegistrar

Your best bet is to use a tool which understands these ServiceLoader requirements like the maven-shade-plugin when configured to use the ServicesResourceTransformer to build your fatjar.

最好的办法是在配置为使用ServicesResourceTransformer来构建你的fatjar时，使用一个了解这些ServiceLoader要求的工具，如maven-shade-plugin。

#2

This looks like a problem with assembly strategy, you should accumulate/merge the services for org.apache.beam.sdk.io.FileSystemRegistrar. More on similar problem here.

这看起来像汇编策略的问题，您应该为org.apache.beam.sdk.io.FileSystemRegistrar积累/合并服务。更多类似的问题在这里。

#1