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https://issues.apache.org/jira/browse/MAPREDUCE-6728?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15368749#comment-15368749
 ] 

Hadoop QA commented on MAPREDUCE-6728:
--------------------------------------

| (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 14s 
{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:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 57s 
{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 6m 
59s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m 39s 
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 
30s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 47s 
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
27s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m 
20s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 35s 
{color} | {color:green} trunk passed {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 7s 
{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m 
38s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m 36s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 1m 36s 
{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red} 0m 25s 
{color} | {color:red} hadoop-mapreduce-project/hadoop-mapreduce-client: The 
patch generated 1 new + 281 unchanged - 1 fixed = 282 total (was 282) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 42s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
22s {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} 1m 
25s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 32s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 2m 4s 
{color} | {color:green} hadoop-mapreduce-client-core in the patch passed. 
{color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 0m 17s 
{color} | {color:green} hadoop-mapreduce-client-shuffle in the patch passed. 
{color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 
17s {color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 22m 41s {color} 
| {color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:9560f25 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12816937/mapreduce6728.prelim.patch
 |
| JIRA Issue | MAPREDUCE-6728 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  findbugs  checkstyle  |
| uname | Linux 088f20ab8353 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 / 932aed6 |
| Default Java | 1.8.0_91 |
| findbugs | v3.0.0 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/6605/artifact/patchprocess/diff-checkstyle-hadoop-mapreduce-project_hadoop-mapreduce-client.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/6605/testReport/ |
| modules | C: 
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core 
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-shuffle
 U: hadoop-mapreduce-project/hadoop-mapreduce-client |
| Console output | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/6605/console |
| Powered by | Apache Yetus 0.3.0   http://yetus.apache.org |


This message was automatically generated.



> Give fetchers hint when ShuffleHandler rejects a shuffling connection
> ---------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6728
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6728
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: mrv2
>            Reporter: Haibo Chen
>            Assignee: Haibo Chen
>         Attachments: mapreduce6728.prelim.patch
>
>
> If # of open shuffle connection to a node goes over the max, ShuffleHandler 
> closes the connection immediately without giving fetchers any hint of the 
> reason, which causes fetchers to fail due to exceptions 
> java.net.SocketException: Unexpected end of file from server
>       at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:772)
>       at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:633)
>       at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:769)
>       at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:633)
>       at 
> sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1323)
>       at 
> java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:468)
>       at 
> org.apache.hadoop.mapreduce.task.reduce.Fetcher.verifyConnection(Fetcher.java:430)
>       at 
> org.apache.hadoop.mapreduce.task.reduce.Fetcher.setupConnectionsWithRetry(Fetcher.java:395)
>       at 
> org.apache.hadoop.mapreduce.task.reduce.Fetcher.openShuffleUrl(Fetcher.java:266)
>       at 
> org.apache.hadoop.mapreduce.task.reduce.Fetcher.copyFromHost(Fetcher.java:323)
>       at org.apache.hadoop.mapreduce.task.reduce.Fetcher.run(Fetcher.java:193)
> OR 
> java.net.SocketException: Connection reset
>       at java.net.SocketInputStream.read(SocketInputStream.java:196)
>       at java.net.SocketInputStream.read(SocketInputStream.java:122)
>       at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
>       at java.io.BufferedInputStream.read1(BufferedInputStream.java:275)
>       at java.io.BufferedInputStream.read(BufferedInputStream.java:334)
>       at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:687)
>       at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:633)
>       at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:769)
>       at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:633)
>       at 
> sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1323)
>       at 
> java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:468)
>       at 
> org.apache.hadoop.mapreduce.task.reduce.Fetcher.verifyConnection(Fetcher.java:430)
>       at 
> org.apache.hadoop.mapreduce.task.reduce.Fetcher.setupConnectionsWithRetry(Fetcher.java:395)
>       at 
> org.apache.hadoop.mapreduce.task.reduce.Fetcher.openShuffleUrl(Fetcher.java:266)
>       at 
> org.apache.hadoop.mapreduce.task.reduce.Fetcher.copyFromHost(Fetcher.java
> Such failures are counted as fetcher failures



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