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https://issues.apache.org/jira/browse/HDFS-8836?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15029553#comment-15029553
 ] 

Hadoop QA commented on HDFS-8836:
---------------------------------

| (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} test4tests {color} | {color:green} 0m 
0s {color} | {color:green} The patch appears to include 2 new or modified test 
files. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 11m 
9s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 17m 
49s {color} | {color:green} trunk passed with JDK v1.8.0_66 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 14m 
17s {color} | {color:green} trunk passed with JDK v1.7.0_85 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 
27s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m 41s 
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
20s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 3m 4s 
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 41s 
{color} | {color:green} trunk passed with JDK v1.8.0_66 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 40s 
{color} | {color:green} trunk passed with JDK v1.7.0_85 {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 2m 
22s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 19m 
38s {color} | {color:green} the patch passed with JDK v1.8.0_66 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 19m 38s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 14m 
50s {color} | {color:green} the patch passed with JDK v1.7.0_85 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 14m 50s 
{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red} 0m 26s 
{color} | {color:red} Patch generated 1 new checkstyle issues in 
hadoop-common-project/hadoop-common (total was 45, now 42). {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m 45s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
23s {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} 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} 3m 
27s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 43s 
{color} | {color:green} the patch passed with JDK v1.8.0_66 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 51s 
{color} | {color:green} the patch passed with JDK v1.7.0_85 {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 14m 14s {color} 
| {color:red} hadoop-common in the patch failed with JDK v1.8.0_66. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 14m 56s {color} 
| {color:red} hadoop-common in the patch failed with JDK v1.7.0_85. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 
36s {color} | {color:green} Patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 130m 14s {color} 
| {color:black} {color} |
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|| Reason || Tests ||
| JDK v1.8.0_66 Failed junit tests | hadoop.fs.shell.find.TestAnd |
|   | hadoop.metrics2.impl.TestMetricsSystemImpl |
|   | hadoop.ipc.TestDecayRpcScheduler |
|   | hadoop.fs.shell.find.TestPrint |
|   | hadoop.fs.shell.find.TestPrint0 |
|   | hadoop.test.TestTimedOutTestsListener |
|   | hadoop.fs.shell.find.TestIname |
|   | hadoop.fs.shell.find.TestName |
|   | hadoop.fs.shell.find.TestFind |
|   | hadoop.ipc.TestRPCWaitForProxy |
| JDK v1.7.0_85 Failed junit tests | hadoop.fs.TestSymlinkLocalFSFileContext |
|   | hadoop.ha.TestZKFailoverController |
|   | hadoop.metrics2.impl.TestMetricsSystemImpl |
|   | hadoop.fs.shell.find.TestPrint |
|   | hadoop.fs.shell.find.TestPrint0 |
|   | hadoop.fs.shell.find.TestIname |
|   | hadoop.fs.shell.find.TestFind |
|   | hadoop.ipc.TestRPCWaitForProxy |
|   | hadoop.ipc.TestIPC |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:0ca8df7 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12774577/HDFS-8836-06.patch |
| JIRA Issue | HDFS-8836 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  findbugs  checkstyle  xml  |
| uname | Linux d5f994e55d78 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 / 9f256d1 |
| findbugs | v3.0.0 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-HDFS-Build/13680/artifact/patchprocess/diff-checkstyle-hadoop-common-project_hadoop-common.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/13680/artifact/patchprocess/patch-unit-hadoop-common-project_hadoop-common-jdk1.8.0_66.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/13680/artifact/patchprocess/patch-unit-hadoop-common-project_hadoop-common-jdk1.7.0_85.txt
 |
| unit test logs |  
https://builds.apache.org/job/PreCommit-HDFS-Build/13680/artifact/patchprocess/patch-unit-hadoop-common-project_hadoop-common-jdk1.8.0_66.txt
 
https://builds.apache.org/job/PreCommit-HDFS-Build/13680/artifact/patchprocess/patch-unit-hadoop-common-project_hadoop-common-jdk1.7.0_85.txt
 |
| JDK v1.7.0_85  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/13680/testReport/ |
| modules | C: hadoop-common-project/hadoop-common U: 
hadoop-common-project/hadoop-common |
| Max memory used | 76MB |
| Powered by | Apache Yetus   http://yetus.apache.org |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/13680/console |


This message was automatically generated.



> Skip newline on empty files with getMerge -nl
> ---------------------------------------------
>
>                 Key: HDFS-8836
>                 URL: https://issues.apache.org/jira/browse/HDFS-8836
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs-client
>    Affects Versions: 2.6.0, 2.7.1
>            Reporter: Jan Filipiak
>            Assignee: Kanaka Kumar Avvaru
>            Priority: Trivial
>         Attachments: HDFS-8836-01.patch, HDFS-8836-02.patch, 
> HDFS-8836-03.patch, HDFS-8836-04.patch, HDFS-8836-05.patch, HDFS-8836-06.patch
>
>
> Hello everyone,
> I recently was in the need of using the new line option -nl with getMerge 
> because the files I needed to merge simply didn't had one. I was merging all 
> the files from one directory and unfortunately this directory also included 
> empty files, which effectively led to multiple newlines append after some 
> files. I needed to remove them manually afterwards.
> In this situation it is maybe good to have another argument that allows 
> skipping empty files.
> Thing one could try to implement this feature:
> The call for IOUtils.copyBytes(in, out, getConf(), false); doesn't
> return the number of bytes copied which would be convenient as one could
> skip append the new line when 0 bytes where copied or one would check the 
> file size before.
> I posted this Idea on the mailing list 
> http://mail-archives.apache.org/mod_mbox/hadoop-user/201507.mbox/%3C55B25140.3060005%40trivago.com%3E
>  but I didn't really get many responses, so I thought I my try this way.



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