Got a pointer from Steve that this is answered on Stack Overflow here:
https://stackoverflow.com/questions/36154484/aws-java-
sdk-manually-set-signature-version

Flink 1.4 contains a specially bundled "fs-s3-hadoop" with smaller no
footprint, compatible across Hadoop versions, and based on a later s3a and
AWS sdk. In that connector, it should work out of the box because it uses a
later AWS SDK. You can also use it with earlier Hadoop versions because
dependencies are relocated, so it should not cash/conflict.




On Mon, Nov 27, 2017 at 8:58 PM, Stephan Ewen <se...@apache.org> wrote:

> Hi!
>
> The endpoint config entry looks correct.
> I was looking at this issue to see if there are pointers to anything else,
> but it looks like the explicit endpoint entry is the most important thing:
> https://issues.apache.org/jira/browse/HADOOP-13324
>
> I cc-ed Steve Loughran, who is Hadoop's S3 expert (sorry Steve for pulling
> you in again - listening and learning still about the subtle bits and
> pieces of S3).
> @Steve are S3 V4 endpoints supported in Hadoop 2.7.x already, or only in
> Hadoop 2.8?
>
> Best,
> Stephan
>
>
> On Mon, Nov 27, 2017 at 9:47 AM, Dominik Bruhn <domi...@dbruhn.de> wrote:
>
>> Hey,
>> can anyone give a hint? Does anyone have flink running with an S3 Bucket
>> in Frankfurt/eu-central-1 and can share his config and setup?
>>
>> Thanks,
>> Dominik
>>
>> On 22. Nov 2017, at 17:52, domi...@dbruhn.de wrote:
>>
>> Hey everyone,
>> I'm trying since hours to get Flink 1.3.2 (downloaded for hadoop 2.7) to
>> snapshot/checkpoint to an S3 bucket which is hosted in the eu-central-1
>> region. Everything works fine for other regions. I'm running my job on a
>> JobTracker in local mode. I googled the internet and found several hints,
>> most of them telling that setting the `fs.s3a.endpoint` should solve it. It
>> doesn't. I'm also sure that the core-site.xml (see below) is picked up, if
>> I put garbage into the endpoint then I receive a hostname not found error.
>>
>> The exception I'm getting is:
>> com.amazonaws.services.s3.model.AmazonS3Exception: Status Code: 400, AWS
>> Service: Amazon S3, AWS Request ID: 432415098B0994BC, AWS Error Code: null,
>> AWS Error Message: Bad Request, S3 Extended Request ID:
>> 1PSDe4EOh7zvfNPdWrwoBKKOtsS/gf9atn5movRzcpvIH2WsR+ptXvXyFyEH
>> XjDb3F9AniXgsBQ=
>>
>> I read the AWS FAQ but I don't think that https://ci.apache.org/projects
>> /flink/flink-docs-release-1.3/setup/aws.html#ioexception-400-bad-request
>> applies to me as I'm not running the NativeFileSystem.
>>
>> I suspect this is related to the v4 signing protocol which is required
>> for S3 in Frankfurt. Could it be that the aws-sdk version is just too old?
>> I tried to play around with it but the hadoop adapter is incompatible with
>> newer versions.
>>
>> I have the following core-site.xml:
>>
>> <?xml version="1.0"?>
>> <configuration>
>>  <property><name>fs.s3.impl</name><value>org.apache.hadoop.f
>> s.s3a.S3AFileSystem</value></property>
>>  <property><name>fs.s3a.buffer.dir</name><value>/tmp</value></property>
>>  <property><name>fs.s3a.access.key</name><value>something</
>> value></property>
>>  <property><name>fs.s3a.secret.key</name><value>wont-tell</
>> value></property>
>>  <property><name>fs.s3a.endpoint</name><value>s3.eu-central-
>> 1.amazonaws.com</value></property>
>> </configuration
>>
>> Here is my lib folder with the versions of the aws-sdk and the hadoop-aws
>> integration:
>> -rw-------    1 root     root       11.4M Mar 20  2014
>> aws-java-sdk-1.7.4.jar
>> -rw-r--r--    1 1005     1006       70.0M Aug  3 12:10
>> flink-dist_2.11-1.3.2.jar
>> -rw-rw-r--    1 1005     1006       98.3K Aug  3 12:07
>> flink-python_2.11-1.3.2.jar
>> -rw-r--r--    1 1005     1006       34.9M Aug  3 11:58
>> flink-shaded-hadoop2-uber-1.3.2.jar
>> -rw-------    1 root     root      100.7K Jan 14  2016
>> hadoop-aws-2.7.2.jar
>> -rw-------    1 root     root      414.7K May 17  2012 httpclient-4.2.jar
>> -rw-------    1 root     root      218.0K May  1  2012 httpcore-4.2.jar
>> -rw-rw-r--    1 1005     1006      478.4K Jul 28 14:50 log4j-1.2.17.jar
>> -rw-rw-r--    1 1005     1006        8.7K Jul 28 14:50
>> slf4j-log4j12-1.7.7.jar
>>
>> Can anyone give me any hints?
>>
>> Thanks,
>> Dominik
>>
>>
>

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