Spark cannot read files stored on AWS S3 in Frankfurt region (Ireland region works fine)

Question

I run Apache Spark (2.11, 1.5.2) on a local machine using input files stored in AWS S3. If the files are stored in a bucket in the Ireland region (eu-west-1) it works fine.

But if I try to read files stored in an S3 bucket located in Frankfurt (eu-central-1) it fails with the error message:

The authorization mechanism you have provided is not supported. Please use AWS4-HMAC-SHA256

How can I use AWS4-HMAC-SHA256?

The detailed error message is:

Exception in thread "main" org.apache.hadoop.fs.s3.S3Exception: org.jets3t.service.S3ServiceException: S3 GET failed for '/%2myfolder' XML Error Message: <?xml version="1.0" encoding="UTF-8"?><Error><Code>InvalidRequest</Code><Message>The authorization mechanism you have provided is not supported. Please use AWS4-HMAC-SHA256.</Message><RequestId>ECB53FECECD1C910</RequestId><HostId>BmEyVcO/eHZR3IO2Z+8IkEWOn189IBGb2YAgbDxhTu+abuyORCEjHyC14l6nIRVNNnQL2Nyya9I=</HostId></Error>
    at org.apache.hadoop.fs.s3.Jets3tFileSystemStore.get(Jets3tFileSystemStore.java:174)
    at org.apache.hadoop.fs.s3.Jets3tFileSystemStore.retrieveINode(Jets3tFileSystemStore.java:214)
...
Caused by: org.jets3t.service.S3ServiceException: S3 GET failed for '/%2myfolder' XML Error Message: <?xml version="1.0" encoding="UTF-8"?><Error><Code>InvalidRequest</Code><Message>The authorization mechanism you have provided is not supported. Please use AWS4-HMAC-SHA256.</Message><RequestId>ECB53FECECD1C910</RequestId><HostId>BmEyVcO/eHZR3IO2Z+8IkEWOn189IBGb2YAgbDxhTu+abuyORCEjHyC14l6nIRVNNnQL2Nyya9I=</HostId></Error>
    at org.jets3t.service.impl.rest.httpclient.RestS3Service.performRequest(RestS3Service.java:416)
    at org.jets3t.service.impl.rest.httpclient.RestS3Service.performRestGet(RestS3Service.java:752)

The code is:

import org.apache.spark.api.java.*;
import org.apache.spark.SparkConf;
import org.apache.spark.api.java.function.Function;

public class S3Problem {
  public static void main(String[] args) {
    String s3Folder = "s3n://mybucket/myfolder";

    SparkConf conf = new SparkConf().setAppName("Simple Application").setMaster("local[*]");

    JavaSparkContext sc = new JavaSparkContext(conf);
    JavaRDD<String> myData = sc.textFile(s3Folder).cache();
    long count = myData.count();

    System.out.println("Line count: " + count);
  }
}

AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY are provided as environment variables.

MarkNS MarkNS · Accepted Answer · 2016-10-11T09:00:13

Putting together Ewan and windsource's answers into a working (at least for me) complete script for PySpark:

import findspark
findspark.init()
import pyspark

spark = pyspark.sql.SparkSession.builder \
    .master("local[*]") \
    .appName("Spark") \
    .config("spark.executor.extraJavaOptions", "-Dcom.amazonaws.services.s3.enableV4=true") \
    .getOrCreate()

# Set the property for the driver. Doesn't work using the same syntax 
# as the executor because the jvm has already been created.
spark.sparkContext.setSystemProperty("com.amazonaws.services.s3.enableV4", "true")

spark.sparkContext._jsc.hadoopConfiguration().set("fs.s3a.endpoint", "s3.eu-central-1.amazonaws.com")
spark.sparkContext._jsc.hadoopConfiguration().set("fs.s3a.proxy.host", "***")
spark.sparkContext._jsc.hadoopConfiguration().set("fs.s3a.proxy.port", "8080")
spark.sparkContext._jsc.hadoopConfiguration().set("fs.s3a.access.key", "***")
spark.sparkContext._jsc.hadoopConfiguration().set("fs.s3a.secret.key", "***")

test = spark.sparkContext.textFile('s3a://my-bucket/test')
print(test.take(5))

Spark cannot read files stored on AWS S3 in Frankfurt region (Ireland region works fine)

3 Answers