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https://issues.apache.org/jira/browse/HDFS-12357?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16143514#comment-16143514
 ] 

Hadoop QA commented on HDFS-12357:
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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 
16s{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:green}+1{color} | {color:green} mvninstall {color} | {color:green} 13m 
59s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
47s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
43s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
53s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m 
41s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
40s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
48s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
44s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
44s{color} | {color:green} the patch passed {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  
0m 39s{color} | {color:orange} hadoop-hdfs-project/hadoop-hdfs: The patch 
generated 5 new + 465 unchanged - 0 fixed = 470 total (was 465) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
50s{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} xml {color} | {color:green}  0m  
1s{color} | {color:green} The patch has no ill-formed XML file. {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red}  1m 
48s{color} | {color:red} hadoop-hdfs-project/hadoop-hdfs generated 1 new + 0 
unchanged - 0 fixed = 1 total (was 0) {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
37s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 90m 41s{color} 
| {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
18s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}116m 40s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| FindBugs | module:hadoop-hdfs-project/hadoop-hdfs |
|  |  Write to static field 
org.apache.hadoop.hdfs.server.namenode.FSDirectory.usersToBypassExtAttrProvider 
from instance method new 
org.apache.hadoop.hdfs.server.namenode.FSDirectory(FSNamesystem, Configuration) 
 At FSDirectory.java:from instance method new 
org.apache.hadoop.hdfs.server.namenode.FSDirectory(FSNamesystem, Configuration) 
 At FSDirectory.java:[line 371] |
| Failed junit tests | hadoop.hdfs.TestLeaseRecoveryStriped |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure150 |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure110 |
|   | hadoop.hdfs.TestDFSStripedInputStreamWithRandomECPolicy |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure180 |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure010 |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure |
|   | hadoop.hdfs.TestReadStripedFileWithDecoding |
|   | hadoop.tools.TestHdfsConfigFields |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure020 |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure100 |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure210 |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure050 |
|   | hadoop.hdfs.TestReconstructStripedFile |
|   | hadoop.hdfs.TestDFSStripedOutputStreamWithFailure070 |
| Timed out junit tests | org.apache.hadoop.hdfs.TestWriteReadStripedFile |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:14b5c93 |
| JIRA Issue | HDFS-12357 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12884001/HDFS-12357.001.patch |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  findbugs  checkstyle  xml  |
| uname | Linux 8006479782a2 3.13.0-117-generic #164-Ubuntu SMP Fri Apr 7 
11:05:26 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh 
|
| git revision | trunk / ae7abad |
| Default Java | 1.8.0_144 |
| findbugs | v3.1.0-RC1 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-HDFS-Build/20890/artifact/patchprocess/diff-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt
 |
| findbugs | 
https://builds.apache.org/job/PreCommit-HDFS-Build/20890/artifact/patchprocess/new-findbugs-hadoop-hdfs-project_hadoop-hdfs.html
 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/20890/artifact/patchprocess/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/20890/testReport/ |
| modules | C: hadoop-hdfs-project/hadoop-hdfs U: 
hadoop-hdfs-project/hadoop-hdfs |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/20890/console |
| Powered by | Apache Yetus 0.6.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Let NameNode to bypass external attribute provider for special user
> -------------------------------------------------------------------
>
>                 Key: HDFS-12357
>                 URL: https://issues.apache.org/jira/browse/HDFS-12357
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Yongjun Zhang
>            Assignee: Yongjun Zhang
>         Attachments: HDFS-12357.001.patch
>
>
> This is a third proposal to solve the problem described in HDFS-12202.
> The problem is, when we do distcp from one cluster to another (or within the 
> same cluster), in addition to copying file data, we copy the metadata from 
> source to target. If external attribute provider is enabled, the metadata may 
> be read from the provider, thus provider data read from source may be saved 
> to target HDFS. 
> We want to avoid saving metadata from external provider to HDFS, so we want 
> to bypass external provider when doing the distcp (or hadoop fs -cp) 
> operation.
> Two alternative approaches were proposed earlier, one in HDFS-12202, the 
> other in HDFS-12294. The proposal here is the third one.
> The idea is, we introduce a new config, that specifies a special user (or a 
> list of users), and let NN bypass external provider when the current user is 
> a special user.
> If we run applications as the special user that need data from external 
> attribute provider, then it won't work. So the constraint on this approach 
> is, the special users here should not run applications that need data from 
> external provider.
> Thanks [~asuresh] for proposing this idea and [~chris.douglas], [~daryn], 
> [~manojg] for the discussions in the other jiras. 
> I'm creating this one to discuss further.



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