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https://issues.apache.org/jira/browse/HADOOP-12780?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15138416#comment-15138416
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Hadoop QA commented on HADOOP-12780:
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| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 10s 
{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 1 new or modified test 
files. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 7m 
5s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 14s 
{color} | {color:green} trunk passed with JDK v1.8.0_66 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 16s 
{color} | {color:green} trunk passed with JDK v1.7.0_91 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 
14s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 22s 
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
12s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 0m 
30s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 13s 
{color} | {color:green} trunk passed with JDK v1.8.0_66 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 14s 
{color} | {color:green} trunk passed with JDK v1.7.0_91 {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m 
16s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 12s 
{color} | {color:green} the patch passed with JDK v1.8.0_66 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 12s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 14s 
{color} | {color:green} the patch passed with JDK v1.7.0_91 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 14s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 
12s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 19s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
10s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m 
0s {color} | {color:green} Patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 0m 
42s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 10s 
{color} | {color:green} the patch passed with JDK v1.8.0_66 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 12s 
{color} | {color:green} the patch passed with JDK v1.7.0_91 {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 1m 7s 
{color} | {color:green} hadoop-azure in the patch passed with JDK v1.8.0_66. 
{color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 1m 22s 
{color} | {color:green} hadoop-azure in the patch passed with JDK v1.7.0_91. 
{color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 
17s {color} | {color:green} Patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 15m 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/12786995/HADOOP-12780.001.patch
 |
| JIRA Issue | HADOOP-12780 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  findbugs  checkstyle  |
| uname | Linux 065bbaccf7e7 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 / acac729 |
| Default Java | 1.7.0_91 |
| Multi-JDK versions |  /usr/lib/jvm/java-8-oracle:1.8.0_66 
/usr/lib/jvm/java-7-openjdk-amd64:1.7.0_91 |
| findbugs | v3.0.0 |
| JDK v1.7.0_91  Test Results | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/8575/testReport/ |
| modules | C: hadoop-tools/hadoop-azure U: hadoop-tools/hadoop-azure |
| Max memory used | 76MB |
| Console output | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/8575/console |
| Powered by | Apache Yetus 0.2.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> During atomic rename handle crash when one directory has been renamed but not 
> file under it.
> --------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-12780
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12780
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs/azure
>    Affects Versions: 2.8.0
>            Reporter: madhumita chakraborty
>            Assignee: madhumita chakraborty
>            Priority: Critical
>         Attachments: HADOOP-12780.001.patch
>
>
> During atomic folder rename process preperaion we record the proposed change 
> to a metadata file (-renamePending.json).
> Say we are renaming parent/folderToRename to parent/renamedFolder.
> folderToRename has an inner folder innerFolder and innerFolder has a file 
> innerFile
> Content of the –renamePending.json file will be
> {   OldFolderName: parent/ folderToRename",
>      NewFolderName: "parent/renamedFolder", 
>      FileList: [ "innerFolder", "innerFolder/innerFile" ]
>  }
> Atfirst we rename all files within the source directory and then rename the 
> source directory at the last step
> The steps are
> 1.    Atfirst we will rename innerFolder, 
> 2.    Then rename innerFolder/innerFile 
> 3.    Then rename source directory folderToRename
> Say the process crashes after step 1.
> So innerFolder has been renamed. 
> Note that Azure storage does not natively support folder. So if a directory 
> created by mkdir command, we create an empty placeholder blob with metadata 
> for the directory.
> So after step 1, the empty blob corresponding to the directory innerFolder 
> has been renamed.
> When the process comes up, in redo path it will go through the 
> –renamePending.json file try to redo the renames. 
> For each file in file list of renamePending file it checks if the source file 
> exists, if source file exists then it renames the file. When it gets 
> innerFolder, it calls filesystem.exists(innerFolder). Now 
> filesystem.exists(innerFolder) will return true, because file under that 
> folder exists even though the empty blob corresponding th that folder does 
> not exist. So it will try to rename this folder, and as the empty blob has 
> already been deleted so this fails with exception that “source blob does not 
> exist”.



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