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https://issues.apache.org/jira/browse/HADOOP-14248?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Nauroth updated HADOOP-14248:
-----------------------------------
Issue Type: Improvement (was: Bug)
> Retire SharedInstanceProfileCredentialsProvider in trunk.
> ---------------------------------------------------------
>
> Key: HADOOP-14248
> URL: https://issues.apache.org/jira/browse/HADOOP-14248
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs/s3
> Affects Versions: 3.0.0-alpha3
> Reporter: Mingliang Liu
> Assignee: Mingliang Liu
> Attachments: HADOOP-14248.000.patch, HADOOP-14248.001.patch,
> HADOOP-14248-branch-2.001.patch, HADOOP-14248-branch-2.002.patch
>
>
> This is from the discussion in [HADOOP-13050].
> So [HADOOP-13727] added the SharedInstanceProfileCredentialsProvider, which
> effectively reduces high number of connections to EC2 Instance Metadata
> Service caused by InstanceProfileCredentialsProvider. That patch, in order to
> prevent the throttling problem, defined new class
> {{SharedInstanceProfileCredentialsProvider}} as a subclass of
> {{InstanceProfileCredentialsProvider}}, which enforces creation of only a
> single instance.
> Per [HADOOP-13050], we upgraded the AWS Java SDK. Since then, the
> {{InstanceProfileCredentialsProvider}} in SDK code internally enforces a
> singleton. That confirms that our effort in [HADOOP-13727] makes 100% sense.
> Meanwhile, {{SharedInstanceProfileCredentialsProvider}} can retire gracefully
> in trunk branch.
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