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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-14248) Retire SharedInstanceProfileCredentialsProvider in trunk.
Date Wed, 12 Apr 2017 17:29:41 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-14248?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15966250#comment-15966250
] 

Hudson commented on HADOOP-14248:
---------------------------------

SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #11577 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/11577/])
HADOOP-14248. Retire SharedInstanceProfileCredentialsProvider in trunk. (cnauroth: rev b8305e6d06cbb9d44c728da14506d5cf825c12e5)
* (delete) hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/SharedInstanceProfileCredentialsProvider.java
* (edit) hadoop-common-project/hadoop-common/src/main/resources/core-default.xml
* (edit) hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/TestS3AAWSCredentialsProvider.java
* (edit) hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/index.md
* (edit) hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AUtils.java


> 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
>             Fix For: 3.0.0-alpha3
>
>         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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