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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HADOOP-13319) S3A to list InstanceProfileCredentialsProvider after EnvironmentVariableCredentialsProvider
Date Tue, 16 Aug 2016 04:59:22 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-13319?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Chris Nauroth resolved HADOOP-13319.
    Resolution: Duplicate

> S3A to list InstanceProfileCredentialsProvider after EnvironmentVariableCredentialsProvider
> -------------------------------------------------------------------------------------------
>                 Key: HADOOP-13319
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13319
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 2.8.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Minor
>         Attachments: HADOOP-13252-branch-2-001.patch
> S3A now has a default list of credential providers to pick up AWS credentials from
> The environment variable provider added in HADOOP-12807 should go before the {{InstanceProfileCredentialsProvider}}
one in the list, as it does a simple env var checkup. In contrast  {{InstanceProfileCredentialsProvider}}
does an HTTP request *even when not running on EC2*. It may block for up to 2s to await a
timeout, and network problems could take longer.
> Checking env vars is a low cost operation that shouldn't have to wait for a network timeout
before being picked up.

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