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https://issues.apache.org/jira/browse/HADOOP-16711?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17566341#comment-17566341
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Steve Loughran commented on HADOOP-16711:
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if cherrypicking, pull in HADOOP-17801
> S3A bucket existence checks to support v2 API and "no checks at all"
> --------------------------------------------------------------------
>
> Key: HADOOP-16711
> URL: https://issues.apache.org/jira/browse/HADOOP-16711
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.2.1
> Reporter: Rajesh Balamohan
> Assignee: Mukund Thakur
> Priority: Minor
> Labels: performance
> Fix For: 3.3.0
>
> Attachments: HADOOP-16711.prelim.1.patch
>
>
> 1. in S3AFileSystem.initialize(), we check for the bucket existing with
> verifyBucketExists(), which calls s3.doesBucketExist(). But that doesn't
> check for auth issues.
> s3. doesBucketExistV2() does at validate credentials, and should be switched
> to. This will help things fail faster
> 2. For performance it would be good to skip verifyBuckets call during S3A
> filesystem init(). This would save a call to S3 during init method.
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