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https://issues.apache.org/jira/browse/HADOOP-12565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15023809#comment-15023809
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Hadoop QA commented on HADOOP-12565:
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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 0s 
{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} mvnsite {color} | {color:green} 1m 6s 
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 57s 
{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 83 line(s) that end in whitespace. Use git 
apply --whitespace=fix. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 
25s {color} | {color:green} Patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 2m 45s {color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:0ca8df7 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12773988/HADOOP-12565.000.patch
 |
| JIRA Issue | HADOOP-12565 |
| Optional Tests |  asflicense  mvnsite  |
| uname | Linux 09bc5936bbfc 3.13.0-36-lowlatency #63-Ubuntu SMP PREEMPT Wed 
Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh 
|
| git revision | trunk / 411e2b2 |
| whitespace | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/8147/artifact/patchprocess/whitespace-eol.txt
 |
| modules | C: hadoop-common-project/hadoop-common U: 
hadoop-common-project/hadoop-common |
| Max memory used | 31MB |
| Powered by | Apache Yetus   http://yetus.apache.org |
| Console output | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/8147/console |


This message was automatically generated.



> Setup passphraseless SSH does not work on all systems
> -----------------------------------------------------
>
>                 Key: HADOOP-12565
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12565
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: documentation
>    Affects Versions: 2.7.1
>         Environment: Linux (Gentoo)
>            Reporter: Alexander Veit
>            Assignee: Mingliang Liu
>            Priority: Minor
>         Attachments: HADOOP-12565.000.patch
>
>
> http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/SingleCluster.html
> suggests to create a DSA key to ssh to localhost. However DSA is going to be 
> deprecated[1], and ssh to localhost with DSA actually does not work on all 
> systems. I suggest to replace DSA with RSA, ECDSA, or ED25519.
> Ref.:
> [1] http://comments.gmane.org/gmane.linux.gentoo.devel/96896



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