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https://issues.apache.org/jira/browse/HADOOP-13163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15286266#comment-15286266
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Hadoop QA commented on HADOOP-13163:
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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 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:red}-1{color} | {color:red} test4tests {color} | {color:red} 0m 0s 
{color} | {color:red} The patch doesn't appear to include any new or modified 
tests. Please justify why no new tests are needed for this patch. Also please 
list what manual steps were performed to verify this patch. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 8m 
38s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 16s 
{color} | {color:green} trunk passed {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 23s 
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
10s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 0m 
29s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 13s 
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m 
18s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 16s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 16s 
{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red} 0m 13s 
{color} | {color:red} hadoop-tools/hadoop-distcp: The patch generated 1 new + 
19 unchanged - 0 fixed = 20 total (was 19) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 21s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
9s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m 
0s {color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 0m 
38s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 12s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 8m 36s 
{color} | {color:green} hadoop-distcp in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 
14s {color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 22m 10s {color} 
| {color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:2c91fd8 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12804341/HADOOP-13163.001.patch
 |
| JIRA Issue | HADOOP-13163 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  findbugs  checkstyle  |
| uname | Linux 7016f84488fc 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 / 9fe5828 |
| Default Java | 1.8.0_91 |
| findbugs | v3.0.0 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/9457/artifact/patchprocess/diff-checkstyle-hadoop-tools_hadoop-distcp.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/9457/testReport/ |
| modules | C: hadoop-tools/hadoop-distcp U: hadoop-tools/hadoop-distcp |
| Console output | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/9457/console |
| Powered by | Apache Yetus 0.3.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Reuse pre-computed filestatus in Distcp-CopyMapper
> --------------------------------------------------
>
>                 Key: HADOOP-13163
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13163
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Rajesh Balamohan
>         Attachments: HADOOP-13163.001.patch
>
>
> https://github.com/apache/hadoop/blob/af942585a108d70e0946f6dd4c465a54d068eabf/hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/mapred/CopyMapper.java#L185
> targetStatus is already computed and it can be reused in checkUpdate() 
> function. This wouldn't be a major issue in NN/HDFS, but in the case of S3 
> getFileStatus calls can be expensive.



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