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https://issues.apache.org/jira/browse/HADOOP-18565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17724858#comment-17724858
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ASF subversion and git services commented on HADOOP-18565:
----------------------------------------------------------

Commit 1f137d3283c0402c1d2dfd4729df362ebe1a45d9 in hadoop's branch 
refs/heads/feature-HADOOP-18073-s3a-sdk-upgrade from ahmarsuhail
[ https://gitbox.apache.org/repos/asf?p=hadoop.git;h=1f137d3283c ]

HADOOP-18565. Complete outstanding items for the AWS SDK V2 upgrade. (#5421)

Changes include
* use bundled transfer manager
* adds transfer listener to upload
* adds support for custom signers
* don't set default endpoint
* removes v1 sdk bundle, only use core package
* implements region caching
+ many more

Note: spotbugs is warning about inconsistent
synchronization in accessing a new s3a FS field.
This will be fixed in a follow-up patch.

Contributed by Ahmar Suhail


> AWS SDK V2 - Complete outstanding items
> ---------------------------------------
>
>                 Key: HADOOP-18565
>                 URL: https://issues.apache.org/jira/browse/HADOOP-18565
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 3.4.0
>            Reporter: Ahmar Suhail
>            Assignee: Ahmar Suhail
>            Priority: Major
>              Labels: pull-request-available
>
> The following work remains to complete the SDK upgrade work:
>  * S3A allows users configure to custom signers, add in support for this.
>  * Remove SDK V1 bundle dependency
>  * Update `getRegion()` logic to use retries. 
>  * Add in progress listeners for `S3ABlockOutputStream`
>  * Fix any failing tests.



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