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Hudson commented on HADOOP-13727: --------------------------------- SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #10670 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/10670/]) HADOOP-13727. S3A: Reduce high number of connections to EC2 Instance (cnauroth: rev d8fa1cfa6722cbf7a4ec3d6b9c44b034da9aa351) * (add) hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/SharedInstanceProfileCredentialsProvider.java * (edit) hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/AWSCredentialProviderList.java * (edit) hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/index.md * (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/ITestS3AAWSCredentialsProvider.java * (add) hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/TestS3AAWSCredentialsProvider.java * (edit) hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/S3ATestUtils.java * (edit) hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AUtils.java > S3A: Reduce high number of connections to EC2 Instance Metadata Service > caused by InstanceProfileCredentialsProvider. > --------------------------------------------------------------------------------------------------------------------- > > Key: HADOOP-13727 > URL: https://issues.apache.org/jira/browse/HADOOP-13727 > Project: Hadoop Common > Issue Type: Sub-task > Components: fs/s3 > Reporter: Rajesh Balamohan > Assignee: Chris Nauroth > Priority: Minor > Fix For: 2.8.0, 3.0.0-alpha2 > > Attachments: HADOOP-13727-branch-2.001.patch, > HADOOP-13727-branch-2.002.patch, HADOOP-13727-branch-2.003.patch, > HADOOP-13727-branch-2.004.patch, HADOOP-13727-branch-2.005.patch > > > When running in an EC2 VM, S3A can make use of > {{InstanceProfileCredentialsProvider}} from the AWS SDK to obtain credentials > from the EC2 Instance Metadata Service. We have observed that for a highly > multi-threaded application, this may generate a high number of calls to the > Instance Metadata Service. The service may throttle the client by replying > with an HTTP 429 response or forcibly closing connections. We can greatly > reduce the number of calls to the service by enforcing that all threads use a > single shared instance of {{InstanceProfileCredentialsProvider}}. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org