Thanks, Robert.

// ah

From: Robert Metzger <rmetz...@apache.org>
Sent: Wednesday, September 22, 2021 1:49 PM
To: Hailu, Andreas [Engineering] <andreas.ha...@ny.email.gs.com>
Cc: user@flink.apache.org
Subject: Re: Many S3V4AuthErrorRetryStrategy warn logs while reading/writing 
from S3

Hey Andreas,

This could be related too 
https://github.com/apache/hadoop/pull/110/files#diff-0a2e55a2f79ea4079eb7b77b0dc3ee562b383076fa0ac168894d50c80a95131dR950<https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_apache_hadoop_pull_110_files-23diff-2D0a2e55a2f79ea4079eb7b77b0dc3ee562b383076fa0ac168894d50c80a95131dR950&d=DwMFaQ&c=7563p3e2zaQw0AB1wrFVgyagb2IE5rTZOYPxLxfZlX4&r=hRr4SA7BtUvKoMBP6VDhfisy2OJ1ZAzai-pcCC6TFXM&m=XrWyobBln-QQ652Sml6hW8XEUlQrYjx_rDoyvyu456U&s=EKNCzrkaFqM8LySKDKyE0xKQqHI_pE00Fxg2feI15Gg&e=>

I guess in Flink this would be

s3.endpoint: your-endpoint-hostname
Where your-endpoint-hostname is a region-specific endpoint, which you can 
probably look up from the S3 docs.


On Wed, Sep 22, 2021 at 7:07 PM Hailu, Andreas 
<andreas.ha...@gs.com<mailto:andreas.ha...@gs.com>> wrote:
Hi,

When reading/writing to and from S3 using the flink-fs-s3-hadoop plugin on 
1.11.2, we observe a lot of these WARN log statements in the logs:

WARN  S3V4AuthErrorRetryStrategy - Attempting to re-send the request to 
s3.amazonaws.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__s3.amazonaws.com&d=DwMFaQ&c=7563p3e2zaQw0AB1wrFVgyagb2IE5rTZOYPxLxfZlX4&r=hRr4SA7BtUvKoMBP6VDhfisy2OJ1ZAzai-pcCC6TFXM&m=XrWyobBln-QQ652Sml6hW8XEUlQrYjx_rDoyvyu456U&s=nIZDYIPynFqOi400vqQM3FygFfZ-mwWYLqpD5v4w7K0&e=>
 with AWS V4 authentication. To avoid this warning in the future, please use 
region-specific endpoint to access buckets located in regions that require V4 
signing.

The applications complete successfully which is great, but I’m not sure what 
the root of the error is and I’m hesitant to silence it through our logging 
configurations. I saw something that looks similar here[1]. Is there a way for 
us to similarly have Flink’s AWS S3 client to use V4 strategy to begin with?

[1] 
https://stackoverflow.com/questions/39513518/aws-emr-writing-to-kms-encrypted-s3-parquet-files<https://urldefense.proofpoint.com/v2/url?u=https-3A__stackoverflow.com_questions_39513518_aws-2Demr-2Dwriting-2Dto-2Dkms-2Dencrypted-2Ds3-2Dparquet-2Dfiles&d=DwMFaQ&c=7563p3e2zaQw0AB1wrFVgyagb2IE5rTZOYPxLxfZlX4&r=hRr4SA7BtUvKoMBP6VDhfisy2OJ1ZAzai-pcCC6TFXM&m=XrWyobBln-QQ652Sml6hW8XEUlQrYjx_rDoyvyu456U&s=wxsQRAaNJ8CqtAAJ6a4Klr26_e486CWtF8GWqvnQb4k&e=>

____________

Andreas Hailu
Data Lake Engineering | Goldman Sachs & Co.


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