使用 Spark 和 Java 从 s3 读取文件时无法连接到服务端点

Question

我需要将 S3 存储桶中的文件读入 Spark 数据集。我使用了正确的 secretKey 和 accessKey，我也尝试了端点配置，但出现此错误：

com.amazonaws.SdkClientException: Failed to connect to service endpoint: 
 at com.amazonaws.internal.EC2ResourceFetcher.doReadResource(EC2ResourceFetcher.java:100)
 at com.amazonaws.internal.InstanceMetadataServiceResourceFetcher.getToken(InstanceMetadataServiceResourceFetcher.java:91)

 ... 74 more



java.nio.file.AccessDeniedException: datalakedbr: org.apache.hadoop.fs.s3a.auth.NoAuthWithAWSException: No AWS Credentials provided by SimpleAWSCredentialsProvider EnvironmentVariableCredentialsProvider InstanceProfileCredentialsProvider : com.amazonaws.SdkClientException: Failed to connect to service endpoint: 

 at org.apache.hadoop.fs.s3a.S3AUtils.translateException(S3AUtils.java:187)
 at org.apache.hadoop.fs.s3a.Invoker.once(Invoker.java:111)
 at org.apache.hadoop.fs.s3a.Invoker.lambda$retry$3(Invoker.java:265)
 at org.apache.hadoop.fs.s3a.Invoker.retryUntranslated(Invoker.java:322)
 at org.apache.hadoop.fs.s3a.Invoker.retry(Invoker.java:261)
Caused by: org.apache.hadoop.fs.s3a.auth.NoAuthWithAWSException: No AWS Credentials provided by SimpleAWSCredentialsProvider EnvironmentVariableCredentialsProvider InstanceProfileCredentialsProvider : com.amazonaws.SdkClientException: Failed to connect to service endpoint: 
 at org.apache.hadoop.fs.s3a.AWSCredentialProviderList.getCredentials(AWSCredentialProviderList.java:159)

这是使用的方法：

    parkSession sparkSession = SparkSession.builder()
            .master("local").appName("readFile")
            .config("fs.s3a.awsAccessKeyId", "key")
            .config("fs.s3a.awsSecretAccessKey", "secretKey")
            .getOrCreate();
    JavaSparkContext sparkContext = new JavaSparkContext(sparkSession.sparkContext());
    String path = "s3a://bucket/path.json";
    Dataset<Row> file = sparkSession.sqlContext().read().load(path);

请问有人可以帮忙吗？

Answer 1

我认为问题出在财产名称上。

在此处查看 Hadoop 文档：https : //hadoop.apache.org/docs/r2.7.2/hadoop-aws/tools/hadoop-aws/index.html

它说对于 S3A，属性的名称应该是fs.s3a.access.key / fs.s3a.secret.key，而不是fs.s3a.awsAccessKeyId / fs.s3a.awsSecretAccessKey。

其他选项是fs.s3.awsAccessKeyId为S3，或fs.s3n.awsAccessKeyId为S3N。