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https://issues.apache.org/jira/browse/HADOOP-17771?focusedWorklogId=613454&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-613454
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ASF GitHub Bot logged work on HADOOP-17771:
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Author: ASF GitHub Bot
Created on: 22/Jun/21 12:28
Start Date: 22/Jun/21 12:28
Worklog Time Spent: 10m
Work Description: steveloughran commented on pull request #3133:
URL: https://github.com/apache/hadoop/pull/3133#issuecomment-865940542
Testing in progress, in a setup where
* the failure mode is replicated
* fs.s3a.endpoint is not set globally or for the test bucket.
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Issue Time Tracking
-------------------
Worklog Id: (was: 613454)
Time Spent: 20m (was: 10m)
> S3AFS creation fails without region set in ~/.aws/config
> --------------------------------------------------------
>
> Key: HADOOP-17771
> URL: https://issues.apache.org/jira/browse/HADOOP-17771
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.3.1
> Environment: Host outside EC2 and without the file ~/.aws/config or
> without a region set in it
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Blocker
> Labels: pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> If you don't have {{fs.s3a.endpoint}} set and lack a region set in
> env var {{AWS_REGION_ENV_VAR}}, system property {{aws.region}} or the file
> ~/.aws/config
> then S3A FS creation fails with the message
> "Unable to find a region via the region provider chain."
> This is caused by the move to the AWS S3 client builder API in HADOOP-13551
> This is pretty dramatic and no doubt everyone will be asking "why didn't you
> notice this?",
> But in fact there are some reasons.
> # when running in EC2, all is well. Meaning our big test runs were all happy.
> # if a developer has fs.s3a.endpoint set for the test bucket, all is well.
> Those of us who work with buckets in the "regions tend to do this, not
> least because it can save a HEAD request every time an FS is created.
> # if you have a region set in ~/.aws/config then all is well
> reason #3 is the real surprise and the one which has really caught out. Even
> my tests against buckets in usw-2 through central didn't fail because of
> course I, like my colleagues, have the AWS S3 client installed locally. This
> was sufficient to make the problem go away. It is also why this has been an
> intermittent problem on test clusters outside AWS infra: it really depended
> on the VM/docker image whether things worked or not.
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