我正在尝试在Google Cloud Dataflow上运行管道,该管道可以使用DirectRunner
成功运行。当我执行此Maven命令时:
mvn compile exec:java \
-Dexec.mainClass=com.example.Pipeline \
-Dexec.args="--project=project-name \
--stagingLocation=gs://bucket-name/staging/ \
... custom arguments ...
--runner=DataflowRunner"
我收到以下错误:
No Runner was specified and the DirectRunner was not found on the classpath.
[ERROR] Specify a runner by either:
[ERROR] Explicitly specifying a runner by providing the 'runner' property
[ERROR] Adding the DirectRunner to the classpath
[ERROR] Calling 'PipelineOptions.setRunner(PipelineRunner)' directly
我故意从
DirectRunner
中删除了pom.xml
并添加了以下内容:<dependency>
<groupId>org.apache.beam</groupId>
<artifactId>beam-runners-google-cloud-dataflow-java</artifactId>
<version>2.0.0</version>
<scope>runtime</scope>
</dependency>
我继续并删除了
<scope>
标记,然后将其命名为options.setRunner(DataflowRunner.class)
,但这没有帮助。从PipelineOptions
扩展自己的DataflowPipelineOptions
接口(interface)也不能解决该问题。看起来它以我无法调试的方式忽略了
runner
选项。更新:这是完整的
pom.xml
,以防万一:<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>dataflow</artifactId>
<version>0.1</version>
<dependencies>
<dependency>
<groupId>org.apache.beam</groupId>
<artifactId>beam-sdks-java-core</artifactId>
<version>2.0.0</version>
</dependency>
<dependency>
<groupId>org.apache.beam</groupId>
<artifactId>beam-runners-google-cloud-dataflow-java</artifactId>
<version>2.0.0</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.apache.beam</groupId>
<artifactId>beam-sdks-java-io-jdbc</artifactId>
<version>2.0.0</version>
</dependency>
<dependency>
<groupId>org.apache.beam</groupId>
<artifactId>beam-sdks-java-io-google-cloud-platform</artifactId>
<version>2.0.0</version>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>42.1.4.jre7</version>
</dependency>
</dependencies>
</project>
最佳答案
忘记将我的PipelineOptions实例作为参数传递给 Pipeline.create()
方法是导致我遇到问题的原因。
PipelineOptionsFactory.register(MyOptions.class);
MyOptions options = PipelineOptionsFactory.fromArgs(args).withValidation().as(MyOptions.class);
Pipeline pipeline = Pipeline.create(options); // Don't forget the options argument.
...
pipeline.run();