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https://issues.apache.org/jira/browse/HADOOP-13786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16058485#comment-16058485
 ] 

Hadoop QA commented on HADOOP-13786:
------------------------------------

| (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 
19s{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 41 new or modified test 
files. {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  1m 
35s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 14m 
21s{color} | {color:green} HADOOP-13345 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 15m 
53s{color} | {color:green} HADOOP-13345 passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  2m 
 0s{color} | {color:green} HADOOP-13345 passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  2m 
52s{color} | {color:green} HADOOP-13345 passed {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red}  1m 
48s{color} | {color:red} hadoop-common-project/hadoop-common in HADOOP-13345 
has 19 extant Findbugs warnings. {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red}  0m 
48s{color} | {color:red} hadoop-tools/hadoop-aws in HADOOP-13345 has 1 extant 
Findbugs warnings. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  2m 
21s{color} | {color:green} HADOOP-13345 passed {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
21s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  2m 
 3s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 12m  
2s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} javac {color} | {color:red} 12m  2s{color} 
| {color:red} root generated 1 new + 787 unchanged - 1 fixed = 788 total (was 
788) {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  
2m  7s{color} | {color:orange} root: The patch generated 48 new + 121 unchanged 
- 23 fixed = 169 total (was 144) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  3m  
7s{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 13 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  
3s{color} | {color:green} The patch has no ill-formed XML file. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  5m  
8s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
57s{color} | {color:green} hadoop-common in the patch passed. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
26s{color} | {color:green} hadoop-yarn-project_hadoop-yarn_hadoop-yarn-registry 
generated 0 new + 45 unchanged - 3 fixed = 45 total (was 48) {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
35s{color} | {color:green} hadoop-mapreduce-client-core in the patch passed. 
{color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
28s{color} | {color:green} hadoop-aws in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  9m  
4s{color} | {color:green} hadoop-common in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  0m 
53s{color} | {color:green} hadoop-yarn-registry in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  3m 
10s{color} | {color:green} hadoop-mapreduce-client-core in the patch passed. 
{color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  1m 
15s{color} | {color:green} hadoop-aws in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
43s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}108m 44s{color} | 
{color:black} {color} |
\\
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:14b5c93 |
| JIRA Issue | HADOOP-13786 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12873947/HADOOP-13786-HADOOP-13345-031.patch
 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  findbugs  checkstyle  xml  |
| uname | Linux 0dfc43ef1b87 3.13.0-116-generic #163-Ubuntu SMP Fri Mar 31 
14:13:22 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh 
|
| git revision | HADOOP-13345 / 0db7176 |
| Default Java | 1.8.0_131 |
| findbugs | v3.1.0-RC1 |
| findbugs | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/12591/artifact/patchprocess/branch-findbugs-hadoop-common-project_hadoop-common-warnings.html
 |
| findbugs | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/12591/artifact/patchprocess/branch-findbugs-hadoop-tools_hadoop-aws-warnings.html
 |
| javac | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/12591/artifact/patchprocess/diff-compile-javac-root.txt
 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/12591/artifact/patchprocess/diff-checkstyle-root.txt
 |
| whitespace | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/12591/artifact/patchprocess/whitespace-eol.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/12591/testReport/ |
| modules | C: hadoop-common-project/hadoop-common 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry 
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core 
hadoop-tools/hadoop-aws U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/12591/console |
| Powered by | Apache Yetus 0.5.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Add S3Guard committer for zero-rename commits to S3 endpoints
> -------------------------------------------------------------
>
>                 Key: HADOOP-13786
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13786
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: fs/s3
>    Affects Versions: HADOOP-13345
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>         Attachments: HADOOP-13786-HADOOP-13345-001.patch, 
> HADOOP-13786-HADOOP-13345-002.patch, HADOOP-13786-HADOOP-13345-003.patch, 
> HADOOP-13786-HADOOP-13345-004.patch, HADOOP-13786-HADOOP-13345-005.patch, 
> HADOOP-13786-HADOOP-13345-006.patch, HADOOP-13786-HADOOP-13345-006.patch, 
> HADOOP-13786-HADOOP-13345-007.patch, HADOOP-13786-HADOOP-13345-009.patch, 
> HADOOP-13786-HADOOP-13345-010.patch, HADOOP-13786-HADOOP-13345-011.patch, 
> HADOOP-13786-HADOOP-13345-012.patch, HADOOP-13786-HADOOP-13345-013.patch, 
> HADOOP-13786-HADOOP-13345-015.patch, HADOOP-13786-HADOOP-13345-016.patch, 
> HADOOP-13786-HADOOP-13345-017.patch, HADOOP-13786-HADOOP-13345-018.patch, 
> HADOOP-13786-HADOOP-13345-019.patch, HADOOP-13786-HADOOP-13345-020.patch, 
> HADOOP-13786-HADOOP-13345-021.patch, HADOOP-13786-HADOOP-13345-022.patch, 
> HADOOP-13786-HADOOP-13345-023.patch, HADOOP-13786-HADOOP-13345-024.patch, 
> HADOOP-13786-HADOOP-13345-025.patch, HADOOP-13786-HADOOP-13345-026.patch, 
> HADOOP-13786-HADOOP-13345-027.patch, HADOOP-13786-HADOOP-13345-028.patch, 
> HADOOP-13786-HADOOP-13345-028.patch, HADOOP-13786-HADOOP-13345-029.patch, 
> HADOOP-13786-HADOOP-13345-030.patch, HADOOP-13786-HADOOP-13345-031.patch, 
> objectstore.pdf, s3committer-master.zip
>
>
> A goal of this code is "support O(1) commits to S3 repositories in the 
> presence of failures". Implement it, including whatever is needed to 
> demonstrate the correctness of the algorithm. (that is, assuming that s3guard 
> provides a consistent view of the presence/absence of blobs, show that we can 
> commit directly).
> I consider ourselves free to expose the blobstore-ness of the s3 output 
> streams (ie. not visible until the close()), if we need to use that to allow 
> us to abort commit operations.



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