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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