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https://issues.apache.org/jira/browse/HADOOP-12953?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16429193#comment-16429193
 ] 

genericqa commented on HADOOP-12953:
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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} 18m 
34s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {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:brown} trunk Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  2m  
2s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 29m 
34s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 34m  
7s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  3m 
36s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 11m 
51s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
26m 46s{color} | {color:green} branch has no errors when building and testing 
our client artifacts. {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue}  0m  
0s{color} | {color:blue} Skipped patched modules with no Java source: 
hadoop-hdfs-project/hadoop-hdfs-native-client {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  3m 
50s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  2m 
34s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
20s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 10m 
52s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 32m  
7s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} cc {color} | {color:green} 32m  
7s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 32m  
7s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  3m 
29s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 11m  
0s{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} shadedclient {color} | {color:green} 
11m  2s{color} | {color:green} patch has no errors when building and testing 
our client artifacts. {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue}  0m  
0s{color} | {color:blue} Skipped patched modules with no Java source: 
hadoop-hdfs-project/hadoop-hdfs-native-client {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  4m  
6s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  2m 
42s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  8m 
49s{color} | {color:green} hadoop-common in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}104m 27s{color} 
| {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 24m 
14s{color} | {color:green} hadoop-hdfs-native-client in the patch passed. 
{color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
47s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}334m 23s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | 
hadoop.hdfs.server.datanode.fsdataset.impl.TestLazyPersistReplicaRecovery |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:8620d2b |
| JIRA Issue | HADOOP-12953 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12917895/HADOOP-12953.003.patch
 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  shadedclient  findbugs  checkstyle  cc  |
| uname | Linux 19398fe68feb 3.13.0-143-generic #192-Ubuntu SMP Tue Feb 27 
10:45:36 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / 024d7c0 |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_162 |
| findbugs | v3.1.0-RC1 |
| unit | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/14448/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/14448/testReport/ |
| Max. process+thread count | 2770 (vs. ulimit of 10000) |
| modules | C: hadoop-common-project/hadoop-common 
hadoop-hdfs-project/hadoop-hdfs hadoop-hdfs-project/hadoop-hdfs-native-client 
U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/14448/console |
| Powered by | Apache Yetus 0.8.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> New API for libhdfs to get FileSystem object as a proxy user
> ------------------------------------------------------------
>
>                 Key: HADOOP-12953
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12953
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs
>    Affects Versions: 2.7.2
>            Reporter: Uday Kale
>            Assignee: Uday Kale
>            Priority: Major
>         Attachments: HADOOP-12953.001.patch, HADOOP-12953.002.patch, 
> HADOOP-12953.003.patch
>
>
> Secure impersonation in HDFS needs users to create proxy users and work with 
> those. In libhdfs, the hdfsBuilder accepts a userName but calls 
> FileSytem.get() or FileSystem.newInstance() with the user name to connect as. 
> But, both these interfaces use getBestUGI() to get the UGI for the given 
> user. This is not necessarily true for all services whose end-users would not 
> access HDFS directly, but go via the service to first get authenticated with 
> LDAP, then the service owner can impersonate the end-user to eventually 
> provide the underlying data.
> For such services that authenticate end-users via LDAP, the end users are not 
> authenticated by Kerberos, so their authentication details wont be in the 
> Kerberos ticket cache. HADOOP_PROXY_USER is not a thread-safe way to get this 
> either. 
> Hence the need for the new API for libhdfs to get the FileSystem object as a 
> proxy user using the 'secure impersonation' recommendations. This approach is 
>  secure since HDFS authenticates the service owner and then validates the 
> right for the service owner to impersonate the given user as allowed by 
> hadoop.proxyusers.* parameters of HDFS config.



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