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Posted to common-issues@hadoop.apache.org by "Chris Nauroth (JIRA)" <ji...@apache.org> on 2017/04/12 17:00:46 UTC
[jira] [Updated] (HADOOP-14301) Deprecate
SharedInstanceProfileCredentialsProvider in branch-2.
[ https://issues.apache.org/jira/browse/HADOOP-14301?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chris Nauroth updated HADOOP-14301:
-----------------------------------
Attachment: HADOOP-14248-branch-2.002.patch
> Deprecate SharedInstanceProfileCredentialsProvider in branch-2.
> ---------------------------------------------------------------
>
> Key: HADOOP-14301
> URL: https://issues.apache.org/jira/browse/HADOOP-14301
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Reporter: Mingliang Liu
> Assignee: Mingliang Liu
> Attachments: HADOOP-14248-branch-2.002.patch
>
>
> [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. {{SharedInstanceProfileCredentialsProvider}} can be deprecated as of release 2.9.0.
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