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https://issues.apache.org/jira/browse/HDFS-10417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15286086#comment-15286086
 ] 

Hadoop QA commented on HDFS-10417:
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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} 15m 58s 
{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:red}-1{color} | {color:red} test4tests {color} | {color:red} 0m 0s 
{color} | {color:red} The patch doesn't appear to include any new or modified 
tests. Please justify why no new tests are needed for this patch. Also please 
list what manual steps were performed to verify this patch. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 7m 
28s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 52s 
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 
31s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 57s 
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
12s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m 
49s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 12s 
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m 
53s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 47s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 47s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 
28s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 54s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
11s {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} 1m 
56s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 9s 
{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 71m 42s {color} 
| {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 
19s {color} | {color:green} Patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 108m 43s {color} 
| {color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.hdfs.shortcircuit.TestShortCircuitLocalRead |
|   | hadoop.hdfs.TestAsyncDFSRename |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:2c91fd8 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12804331/HDFS-10417.000.patch |
| JIRA Issue | HDFS-10417 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  findbugs  checkstyle  |
| uname | Linux b04494d73e26 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 / 2c91fd8 |
| Default Java | 1.8.0_91 |
| findbugs | v3.0.0 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/15455/artifact/patchprocess/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
 |
| unit test logs |  
https://builds.apache.org/job/PreCommit-HDFS-Build/15455/artifact/patchprocess/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/15455/testReport/ |
| modules | C: hadoop-hdfs-project/hadoop-hdfs U: 
hadoop-hdfs-project/hadoop-hdfs |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/15455/console |
| Powered by | Apache Yetus 0.2.0   http://yetus.apache.org |


This message was automatically generated.



> Actionable msgs for checkBlockLocalPathAccess
> ---------------------------------------------
>
>                 Key: HDFS-10417
>                 URL: https://issues.apache.org/jira/browse/HDFS-10417
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>    Affects Versions: 2.7.2
>            Reporter: Tianyin Xu
>            Priority: Minor
>         Attachments: HDFS-10417.000.patch
>
>
> The exception msg thrown by {{checkBlockLocalPathAccess}} is very specific to 
> the implementation detail. It's really hard for users to understand it unless 
> she reads and understands the code. 
> The code is shown as follows:
> {code:title=org.apache.hadoop.hdfs.server.datanode.DataNode|borderStyle=solid}
>   private void checkBlockLocalPathAccess() throws IOException {
>     checkKerberosAuthMethod("getBlockLocalPathInfo()");
>     String currentUser = 
> UserGroupInformation.getCurrentUser().getShortUserName();
>     if (!usersWithLocalPathAccess.contains(currentUser)) {
>       throw new AccessControlException(
>           "Can't continue with getBlockLocalPathInfo() "
>               + "authorization. The user " + currentUser
>               + " is not allowed to call getBlockLocalPathInfo");
>     }    
>   }
> {code}
> (basically she needs to understand the code logic of getBlockLocalPathInfo)
> \\
> Note that {{usersWithLocalPathAccess}} is a *private final* purely coming 
> from the configuration settings of {{dfs.block.local-path-access.user}},
> {code:title=org.apache.hadoop.hdfs.server.datanode.DataNode|borderStyle=solid}
> private final List<String> usersWithLocalPathAccess;
> ....
> this.usersWithLocalPathAccess = Arrays.asList(
>     
> conf.getTrimmedStrings(DFSConfigKeys.DFS_BLOCK_LOCAL_PATH_ACCESS_USER_KEY));
> {code}
> In other word, the checking fails simply because the current user is not 
> specified in the configuration setting of 
> {{dfs.block.local-path-access.user}}. The log message should be much more 
> clearer to make it easy for users to take actions, as demonstrated in the 
> attached patch. 
> Thanks!



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