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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13727) S3A: Reduce high number of connections to EC2 Instance Metadata Service caused by InstanceProfileCredentialsProvider.
Date Tue, 25 Oct 2016 01:37:59 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13727?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15603851#comment-15603851
] 

Hadoop QA commented on HADOOP-13727:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 16s{color} | {color:blue}
Docker mode activated. {color} |
| {color:green}+1{color} | {color:green} @author {color} | {color:green}  0m  0s{color} |
{color:green} The patch does not contain any @author tags. {color} |
| {color:green}+1{color} | {color:green} test4tests {color} | {color:green}  0m  0s{color}
| {color:green} The patch appears to include 3 new or modified test files. {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 57s{color} | {color:blue}
Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  6m 40s{color}
| {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  5m 32s{color} |
{color:green} branch-2 passed with JDK v1.8.0_101 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  6m 32s{color} |
{color:green} branch-2 passed with JDK v1.7.0_111 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 27s{color}
| {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 23s{color} |
{color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  1m 20s{color}
| {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  2m 17s{color} |
{color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m  2s{color} |
{color:green} branch-2 passed with JDK v1.8.0_101 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 15s{color} |
{color:green} branch-2 passed with JDK v1.7.0_111 {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 15s{color} | {color:blue}
Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m  3s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  5m 29s{color} |
{color:green} the patch passed with JDK v1.8.0_101 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  5m 29s{color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  6m 31s{color} |
{color:green} the patch passed with JDK v1.7.0_111 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  6m 31s{color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 26s{color}
| {color:green} root: The patch generated 0 new + 4 unchanged - 3 fixed = 4 total (was 7)
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| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 27s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 37s{color}
| {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} whitespace {color} | {color:red}  0m  0s{color} | {color:red}
The patch has 47 line(s) that end in whitespace. Use git apply --whitespace=fix <<patch_file>>.
Refer https://git-scm.com/docs/git-apply {color} |
| {color:green}+1{color} | {color:green} xml {color} | {color:green}  0m  1s{color} | {color:green}
The patch has no ill-formed XML file. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  2m 47s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m  6s{color} |
{color:green} the patch passed with JDK v1.8.0_101 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 21s{color} |
{color:green} the patch passed with JDK v1.7.0_111 {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  7m 28s{color} | {color:green}
hadoop-common in the patch passed with JDK v1.7.0_111. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  0m 29s{color} | {color:green}
hadoop-aws in the patch passed with JDK v1.7.0_111. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 29s{color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 91m 42s{color} | {color:black}
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:b59b8b7 |
| JIRA Issue | HADOOP-13727 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12835041/HADOOP-13727-branch-2.005.patch
|
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  unit  xml  findbugs
 checkstyle  |
| uname | Linux 8fbb2c0fe7cb 3.13.0-95-generic #142-Ubuntu SMP Fri Aug 12 17:00:09 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh |
| git revision | branch-2 / 086577c |
| Default Java | 1.7.0_111 |
| Multi-JDK versions |  /usr/lib/jvm/java-8-oracle:1.8.0_101 /usr/lib/jvm/java-7-openjdk-amd64:1.7.0_111
|
| findbugs | v3.0.0 |
| whitespace | https://builds.apache.org/job/PreCommit-HADOOP-Build/10883/artifact/patchprocess/whitespace-eol.txt
|
| JDK v1.7.0_111  Test Results | https://builds.apache.org/job/PreCommit-HADOOP-Build/10883/testReport/
|
| modules | C: hadoop-common-project/hadoop-common hadoop-tools/hadoop-aws U: . |
| Console output | https://builds.apache.org/job/PreCommit-HADOOP-Build/10883/console |
| Powered by | Apache Yetus 0.4.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> 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
>         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}}.



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