我正在尝试运行一个管道,我能够使用 DirectRunner
成功运行它, 在谷歌云数据流上。当我执行这个 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
我故意删除了 DirectRunner
来 self 的 pom.xml
并添加了这个:
<dependency>
<groupId>org.apache.beam</groupId>
<artifactId>beam-runners-google-cloud-dataflow-java</artifactId>
<version>2.0.0</version>
<scope>runtime</scope>
</dependency>
我继续删除了 <scope>
标记,然后称为 options.setRunner(DataflowRunner.class)
,但这没有帮助。扩展我自己的 PipelineOptions
来自 DataflowPipelineOptions
的界面也没有解决问题。
看起来它忽略了 runner
我无法调试的选项。
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()
方法是我的问题的原因。
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();
关于java - Apache 光束 : Cannot find DataflowRunner,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/45527075/