Beam：无法序列化和反序列化属性 'awsCredentialsProvider

Question

我一直在使用 Beam 管道 examples as a guide in an attempt to load files from S3 for my pipeline. Like in the examples I have defined my own PipelineOptions that also extends S3Options and I am attempting to use the DefaultAWSCredentialsProviderChain。配置这个的代码是：

MyPipelineOptions options = PipelineOptionsFactory.fromArgs(args).as(MyPipelineOptions.class);

options.setAwsCredentialsProvider(new DefaultAWSCredentialsProviderChain());
options.setAwsRegion("us-east-1");

runPipeline(options);

当我从 Intellij 运行它使用 Direct Runner 它工作正常但是当我将它打包为 jar 并执行它时（也使用 Direct Runner）我看到：

Exception in thread "main" java.lang.IllegalArgumentException: PipelineOptions specified failed to serialize to JSON.
    at org.apache.beam.runners.direct.DirectRunner.run(DirectRunner.java:166)
    at org.apache.beam.runners.direct.DirectRunner.run(DirectRunner.java:67)
    at org.apache.beam.sdk.Pipeline.run(Pipeline.java:313)
    at org.apache.beam.sdk.Pipeline.run(Pipeline.java:299)
    at a.b.c.beam.CleanSkeleton.runPipeline(CleanSkeleton.java:69)
    at a.b.c.beam.CleanSkeleton.main(CleanSkeleton.java:53)
Caused by: com.fasterxml.jackson.databind.JsonMappingException: Unexpected IOException (of type java.io.IOException): Failed to serialize and deserialize property 'awsCredentialsProvider' with value 'com.amazonaws.auth.DefaultAWSCredentialsProviderChain@40f33492'
    at com.fasterxml.jackson.databind.JsonMappingException.fromUnexpectedIOE(JsonMappingException.java:338)
    at com.fasterxml.jackson.databind.ObjectMapper.writeValueAsBytes(ObjectMapper.java:3247)
    at org.apache.beam.runners.direct.DirectRunner.run(DirectRunner.java:163)
    ... 5 more

我正在使用 gradle 通过以下任务构建我的 jar：

jar {
    manifest {
        attributes (
                'Main-Class': 'a.b.c.beam.CleanSkeleton'
        )
    }
    from {
        configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
    }
    from('src') {
        include '/main/resources/*'
    }



    zip64 true
    exclude 'META-INF/*.RSA', 'META-INF/*.SF', 'META-INF/*.DSA'
}

Answer 1

出现问题是因为在创建 fat/uber jar 时，META-INF/serivces 中的文件被重复文件覆盖。特别是 com.fasterxml.jackson.databind.Module 需要定义许多 Jackson 模块但缺失的地方。其中包括 org.apache.beam.sdk.io.aws.options.AwsModule 和 com.fasterxml.jackson.datatype.joda.JodaModule。 DirectRunner 中的代码像这样实例化 ObjectMapper：

new ObjectMapper()
      .registerModules(ObjectMapper.findModules(ReflectHelpers.findClassLoader()));

ObjectMapper::findModules 依赖 java.util.ServiceLoader 从 META-INF/services/ 文件中定位服务。

解决方案是使用 gradle Shadow plugin 构建 fat/uber jar 并将其配置为合并服务文件：

apply plugin: 'com.github.johnrengelman.shadow'

shadowJar {
    mergeServiceFiles()
    zip64 true
}

Beam：无法序列化和反序列化属性 'awsCredentialsProvider

Beam: Failed to serialize and deserialize property 'awsCredentialsProvider

java

amazon-s3

gradle

apache-beam

Beam：无法序列化和反序列化 属性 'awsCredentialsProvider

Beam: Failed to serialize and deserialize property 'awsCredentialsProvider

java

amazon-s3

gradle

apache-beam

Beam：无法序列化和反序列化属性 'awsCredentialsProvider