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https://issues.apache.org/jira/browse/HDFS-11395?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15895929#comment-15895929
 ] 

Hadoop QA commented on HDFS-11395:
----------------------------------

| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 
41s{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:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  2m  
0s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 14m 
30s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 11m 
56s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  2m 
22s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  2m 
41s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 
57s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  4m  
5s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
42s{color} | {color:green} trunk passed {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
15s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m 
35s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 11m  
0s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 11m  
0s{color} | {color:green} the patch passed {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  
2m  5s{color} | {color:orange} root: The patch generated 10 new + 10 unchanged 
- 0 fixed = 20 total (was 10) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  2m 
43s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  1m 
 1s{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}  4m 
25s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  2m  
1s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  8m 
32s{color} | {color:green} hadoop-common in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 95m  
6s{color} | {color:green} hadoop-hdfs in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
45s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}171m 58s{color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:a9ad5d6 |
| JIRA Issue | HDFS-11395 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12856068/HDFS-11395.003.patch |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  findbugs  checkstyle  |
| uname | Linux 7f66a8e5847e 3.13.0-108-generic #155-Ubuntu SMP Wed Jan 11 
16:58:52 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh 
|
| git revision | trunk / c8bd8ac |
| Default Java | 1.8.0_121 |
| findbugs | v3.0.0 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18562/artifact/patchprocess/diff-checkstyle-root.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18562/testReport/ |
| modules | C: hadoop-common-project/hadoop-common 
hadoop-hdfs-project/hadoop-hdfs U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/18562/console |
| Powered by | Apache Yetus 0.5.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> RequestHedgingProxyProvider#RequestHedgingInvocationHandler hides the 
> Exception thrown from NameNode
> ----------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-11395
>                 URL: https://issues.apache.org/jira/browse/HDFS-11395
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: ha
>            Reporter: Nandakumar
>            Assignee: Nandakumar
>         Attachments: HDFS-11395.000.patch, HDFS-11395.001.patch, 
> HDFS-11395.002.patch, HDFS-11395.003.patch, HDFS-11395.004.patch
>
>
> When using RequestHedgingProxyProvider, in case of Exception (like 
> FileNotFoundException) from ActiveNameNode, 
> {{RequestHedgingProxyProvider#RequestHedgingInvocationHandler.invoke}} 
> receives {{ExecutionException}} since we use {{CompletionService}} for the 
> call. The ExecutionException is put into a map and wrapped with 
> {{MultiException}}.
> So for a FileNotFoundException the client receives 
> {{MultiException(Map(ExecutionException(InvocationTargetException(RemoteException(FileNotFoundException)))))}}
> It will cause problem in clients which are handling RemoteExceptions.



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