AWS Java SDK – Unable to find a region via the region provider chain

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AWS Java SDK – Unable to find a region via the region provider chain

  1. AWS Java SDK – Unable to find a region via the region provider chain

    As mentioned in the answer above you need to have S3 and lambda in same region and here's why-
    If you don't explicitly set a region using the withRegion methods, the SDK consults the default region provider chain to try and determine the region to use. One of the methods used is –

  2. AWS Java SDK – Unable to find a region via the region provider chain

    As mentioned in the answer above you need to have S3 and lambda in same region and here's why-
    If you don't explicitly set a region using the withRegion methods, the SDK consults the default region provider chain to try and determine the region to use. One of the methods used is –

Solution 1

Regarding Q1, try to build your client using the following syntax:

AmazonS3 amazonS3 = AmazonS3Client.builder()
    .withRegion("us-east-1")
    .withCredentials(new AWSStaticCredentialsProvider(creds))
    .build();
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Original Author mapm Of This Content

Solution 2

As mentioned in the answer above you need to have S3 and lambda in same region and here’s why-

If you don’t explicitly set a region using the withRegion methods, the SDK consults the default region provider chain to try and determine the region to use. One of the methods used is –

The AWS_REGION environment variable is checked. If it’s set, that region is used to configure the client.

And in the case of Lambda –

This environment variable is set by the Lambda container.

Finally, to use default credential/region provider chain to determine the region from the environment, use the client builder’s defaultClient method.

AmazonS3 s3Client = AmazonS3ClientBuilder.defaultClient();

This is the same as using standard followed by build.

AmazonS3 s3Client = AmazonS3ClientBuilder.standard().build();

AWS Documentation: https://docs.aws.amazon.com/sdk-for-java/v1/developer-guide/java-dg-region-selection.html

More details: How to fix “Unable to find a region via the region provider chain” exception with AWS SDK

PS: Above link goes to my personal blog that has additional details on this.

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Original Author Aniket Thakur Of This Content

Solution 3

Actually, while I faced this issue was not possible to update the code all the time.

Thus we need to look into the reasons why it’s happening, While investigating I found there is .aws folder created at your root. It was created because I tried to install aws console some time back.

The solution is you need to update your config file with region.

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Original Author Kumar Abhishek Of This Content

Solution 4

Well steps you can take to investigate:

Please make sure your Lambda function and S3 are in the same region.
(When you use ProviderChain, it will pick up the region from the Lambda function

Also, You should not need to specify the BasicCredentials(aws-key..etc) if you are using Lambda.

Please read about Lambda Permission model (http://docs.aws.amazon.com/lambda/latest/dg/intro-permission-model.html):

Basically, the Lambda role that you assign should have permission to access S3.

All you need to configure S3 is pretty much:

private static final AmazonS3 s3Client = 
AmazonS3ClientBuilder.defaultClient();

To test it locally, make sure you have configured the AWS Credentials locally.

You can check if you have the credentials, if you go into .aws/credentials (This will contain the “aws-access-key”, “aws-secret-key”)

http://docs.aws.amazon.com/sdk-for-java/v1/developer-guide/setup-credentials.html

To set up your credentials locally, all you need to do is run the AWS Cli command: aws configure (http://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-started.htm)

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Original Author ian1095 Of This Content

Conclusion

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So This is all About This Tutorial. Hope This Tutorial Helped You. Thank You.

Also Read,

Siddharth

I am an Information Technology Engineer. I have Completed my MCA And I have 4 Year Plus Experience, I am a web developer with knowledge of multiple back-end platforms Like PHP, Node.js, Python and frontend JavaScript frameworks Like Angular, React, and Vue.

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