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https://issues.apache.org/jira/browse/HDFS-9579?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15181388#comment-15181388
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Hadoop QA commented on HDFS-9579:
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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} 13m 38s 
{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 6 new or modified test 
files. {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 30s 
{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 6m 
54s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 5m 50s 
{color} | {color:green} trunk passed with JDK v1.8.0_74 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 6m 40s 
{color} | {color:green} trunk passed with JDK v1.7.0_95 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 1m 
9s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 2m 23s 
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
40s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 5m 4s 
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 2m 18s 
{color} | {color:green} trunk passed with JDK v1.8.0_74 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 3m 13s 
{color} | {color:green} trunk passed with JDK v1.7.0_95 {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 14s 
{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 1m 
56s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 5m 35s 
{color} | {color:green} the patch passed with JDK v1.8.0_74 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 5m 35s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 6m 32s 
{color} | {color:green} the patch passed with JDK v1.7.0_95 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 6m 32s 
{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red} 1m 11s 
{color} | {color:red} root: patch generated 4 new + 546 unchanged - 10 fixed = 
550 total (was 556) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 2m 19s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
40s {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} 5m 
48s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 2m 17s 
{color} | {color:green} the patch passed with JDK v1.8.0_74 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 3m 12s 
{color} | {color:green} the patch passed with JDK v1.7.0_95 {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 6m 51s 
{color} | {color:green} hadoop-common in the patch passed with JDK v1.8.0_74. 
{color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 0m 49s 
{color} | {color:green} hadoop-hdfs-client in the patch passed with JDK 
v1.8.0_74. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 53m 31s {color} 
| {color:red} hadoop-hdfs in the patch failed with JDK v1.8.0_74. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 7m 39s 
{color} | {color:green} hadoop-common in the patch passed with JDK v1.7.0_95. 
{color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 0m 58s 
{color} | {color:green} hadoop-hdfs-client in the patch passed with JDK 
v1.7.0_95. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 51m 44s 
{color} | {color:green} hadoop-hdfs in the patch passed with JDK v1.7.0_95. 
{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} 201m 39s {color} 
| {color:black} {color} |
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|| Reason || Tests ||
| JDK v1.8.0_74 Failed junit tests | 
hadoop.hdfs.server.datanode.TestDataNodeMetrics |
|   | hadoop.hdfs.server.namenode.TestNamenodeCapacityReport |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:0ca8df7 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12791279/HDFS-9579-9.patch |
| JIRA Issue | HDFS-9579 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  findbugs  checkstyle  |
| uname | Linux fac1ff19abc6 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 / 8e08861 |
| Default Java | 1.7.0_95 |
| Multi-JDK versions |  /usr/lib/jvm/java-8-oracle:1.8.0_74 
/usr/lib/jvm/java-7-openjdk-amd64:1.7.0_95 |
| findbugs | v3.0.0 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-HDFS-Build/14721/artifact/patchprocess/diff-checkstyle-root.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/14721/artifact/patchprocess/patch-unit-hadoop-hdfs-project_hadoop-hdfs-jdk1.8.0_74.txt
 |
| unit test logs |  
https://builds.apache.org/job/PreCommit-HDFS-Build/14721/artifact/patchprocess/patch-unit-hadoop-hdfs-project_hadoop-hdfs-jdk1.8.0_74.txt
 |
| JDK v1.7.0_95  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/14721/testReport/ |
| modules | C:  hadoop-common-project/hadoop-common   
hadoop-hdfs-project/hadoop-hdfs-client   hadoop-hdfs-project/hadoop-hdfs  U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/14721/console |
| Powered by | Apache Yetus 0.3.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Provide bytes-read-by-network-distance metrics at FileSystem.Statistics level
> -----------------------------------------------------------------------------
>
>                 Key: HDFS-9579
>                 URL: https://issues.apache.org/jira/browse/HDFS-9579
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Ming Ma
>            Assignee: Ming Ma
>         Attachments: HDFS-9579-2.patch, HDFS-9579-3.patch, HDFS-9579-4.patch, 
> HDFS-9579-5.patch, HDFS-9579-6.patch, HDFS-9579-7.patch, HDFS-9579-8.patch, 
> HDFS-9579-9.patch, HDFS-9579.patch, MR job counters.png
>
>
> For cross DC distcp or other applications, it becomes useful to have insight 
> as to the traffic volume for each network distance to distinguish cross-DC 
> traffic, local-DC-remote-rack, etc.
> FileSystem's existing {{bytesRead}} metrics tracks all the bytes read. To 
> provide additional metrics for each network distance, we can add additional 
> metrics to FileSystem level and have {{DFSInputStream}} update the value 
> based on the network distance between client and the datanode.
> {{DFSClient}} will resolve client machine's network location as part of its 
> initialization. It doesn't need to resolve datanode's network location for 
> each read as {{DatanodeInfo}} already has the info.
> There are existing HDFS specific metrics such as {{ReadStatistics}} and 
> {{DFSHedgedReadMetrics}}. But these metrics are only accessible via 
> {{DFSClient}} or {{DFSInputStream}}. Not something that application framework 
> such as MR and Tez can get to. That is the benefit of storing these new 
> metrics in FileSystem.Statistics.
> This jira only includes metrics generation by HDFS. The consumption of these 
> metrics at MR and Tez will be tracked by separated jiras.
> We can add similar metrics for HDFS write scenario later if it is necessary.



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