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Posted to common-issues@hadoop.apache.org by "Chris Nauroth (JIRA)" <ji...@apache.org> on 2017/04/12 16:58:41 UTC
[jira] [Created] (HADOOP-14301) Deprecate
SharedInstanceProfileCredentialsProvider in branch-2.
Chris Nauroth created HADOOP-14301:
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Summary: 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
[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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