Mingliang Liu created HADOOP-14248:
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Summary: Retire SharedInstanceProfileCredentialsProvider after AWS
SDK upgrade
Key: HADOOP-14248
URL: https://issues.apache.org/jira/browse/HADOOP-14248
Project: Hadoop Common
Issue Type: Sub-task
Components: fs/s3
Affects Versions: 3.0.0-alpha3
Reporter: Mingliang Liu
Assignee: Mingliang Liu
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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