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https://issues.apache.org/jira/browse/HADOOP-18820?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17749244#comment-17749244
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ASF GitHub Bot commented on HADOOP-18820:
-----------------------------------------
steveloughran commented on code in PR #5872:
URL: https://github.com/apache/hadoop/pull/5872#discussion_r1279497298
##########
hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/aws_sdk_upgrade.md:
##########
@@ -49,14 +137,67 @@ has been replaced by
[software.amazon.awssdk.auth.credentials.AwsCredentialsProv
changed.
The change in interface will mean that custom credential providers will need
to be updated to now
-implement `AwsCredentialsProvider` instead of `AWSCredentialProvider`.
+implement `software.amazon.awssdk.auth.credentials.AwsCredentialsProvider`
instead of
+`com.amazonaws.auth.AWSCredentialsProvider`.
+
+#### Original v1 `AWSCredentialsProvider` interface
+
+Note how the interface begins with the capitalized "AWS" acronym.
+The v2 interface starts with "Aws". This is a very subtle change
+for developers to spot.
+Compilers _will_ detect and report the type mismatch.
+
Review Comment:
fixed
> AWS SDK v2: make the v1 bridging support optional
> -------------------------------------------------
>
> Key: HADOOP-18820
> URL: https://issues.apache.org/jira/browse/HADOOP-18820
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.4.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
> Labels: pull-request-available
>
> The AWS SDK v2 code includes the v1 sdk core for plugin support of
> * existing credential providers
> * delegation token binding
> I propose we break #2 and rely on those who have implemented to to upgrade.
> apart from all the needless changes the v2 SDK did to the api (why?) this is
> fairly straighforward
> for #1: fix through reflection, retaining a v1 sdk dependency at test time so
> we can verify that the binder works.
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