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https://issues.apache.org/jira/browse/HADOOP-12253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15089491#comment-15089491
 ] 

Hadoop QA commented on HADOOP-12253:
------------------------------------

| (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 0s 
{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 
53s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 8m 35s 
{color} | {color:green} trunk passed with JDK v1.8.0_66 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 9m 15s 
{color} | {color:green} trunk passed with JDK v1.7.0_91 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 
17s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m 5s 
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
14s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m 
56s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 56s 
{color} | {color:green} trunk passed with JDK v1.8.0_66 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 6s 
{color} | {color:green} trunk passed with JDK v1.7.0_91 {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 1m 
39s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 8m 32s 
{color} | {color:green} the patch passed with JDK v1.8.0_66 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 8m 32s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 9m 16s 
{color} | {color:green} the patch passed with JDK v1.7.0_91 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 9m 16s 
{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red} 0m 17s 
{color} | {color:red} Patch generated 3 new checkstyle issues in 
hadoop-common-project/hadoop-common (total was 64, now 67). {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m 3s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
14s {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} 2m 4s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 57s 
{color} | {color:green} the patch passed with JDK v1.8.0_66 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 7s 
{color} | {color:green} the patch passed with JDK v1.7.0_91 {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 7m 41s {color} 
| {color:red} hadoop-common in the patch failed with JDK v1.8.0_66. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 7m 50s {color} 
| {color:red} hadoop-common in the patch failed with JDK v1.7.0_91. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 
24s {color} | {color:green} Patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 73m 41s {color} 
| {color:black} {color} |
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|| Reason || Tests ||
| JDK v1.8.0_66 Failed junit tests | hadoop.metrics2.impl.TestGangliaMetrics |
| JDK v1.7.0_91 Failed junit tests | hadoop.fs.shell.TestCopyPreserveFlag |
|   | hadoop.ipc.TestIPC |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:0ca8df7 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12749752/HADOOP-12253.patch |
| JIRA Issue | HADOOP-12253 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  findbugs  checkstyle  |
| uname | Linux a269bbc0e2d6 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 / ed18527 |
| Default Java | 1.7.0_91 |
| Multi-JDK versions |  /usr/lib/jvm/java-8-oracle:1.8.0_66 
/usr/lib/jvm/java-7-openjdk-amd64:1.7.0_91 |
| findbugs | v3.0.0 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/8365/artifact/patchprocess/diff-checkstyle-hadoop-common-project_hadoop-common.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/8365/artifact/patchprocess/patch-unit-hadoop-common-project_hadoop-common-jdk1.8.0_66.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/8365/artifact/patchprocess/patch-unit-hadoop-common-project_hadoop-common-jdk1.7.0_91.txt
 |
| unit test logs |  
https://builds.apache.org/job/PreCommit-HADOOP-Build/8365/artifact/patchprocess/patch-unit-hadoop-common-project_hadoop-common-jdk1.8.0_66.txt
 
https://builds.apache.org/job/PreCommit-HADOOP-Build/8365/artifact/patchprocess/patch-unit-hadoop-common-project_hadoop-common-jdk1.7.0_91.txt
 |
| JDK v1.7.0_91  Test Results | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/8365/testReport/ |
| modules | C: hadoop-common-project/hadoop-common U: 
hadoop-common-project/hadoop-common |
| Max memory used | 75MB |
| Powered by | Apache Yetus 0.2.0-SNAPSHOT   http://yetus.apache.org |
| Console output | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/8365/console |


This message was automatically generated.



> ViewFileSystem getFileStatus java.lang.ArrayIndexOutOfBoundsException: 0
> ------------------------------------------------------------------------
>
>                 Key: HADOOP-12253
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12253
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 2.6.0
>         Environment: hadoop 2.6.0   hive 1.1.0 tez0.7  cenos6.4
>            Reporter: tangjunjie
>            Assignee: Ajith S
>         Attachments: HADOOP-12253.patch
>
>
> When I enable hdfs federation.I run a query on hive on tez. Then it occur a 
> exception:
> {noformat}
> 8.784 PM      WARN    org.apache.hadoop.security.UserGroupInformation No 
> groups available for user tangjijun
> 3:12:28.784 PM        ERROR   org.apache.hadoop.hive.ql.exec.Task     Failed 
> to execute tez graph.
> java.lang.ArrayIndexOutOfBoundsException: 0
>       at 
> org.apache.hadoop.fs.viewfs.ViewFileSystem$InternalDirOfViewFs.getFileStatus(ViewFileSystem.java:771)
>       at 
> org.apache.hadoop.fs.viewfs.ViewFileSystem.getFileStatus(ViewFileSystem.java:359)
>       at 
> org.apache.tez.client.TezClientUtils.checkAncestorPermissionsForAllUsers(TezClientUtils.java:955)
>       at 
> org.apache.tez.client.TezClientUtils.setupTezJarsLocalResources(TezClientUtils.java:184)
>       at 
> org.apache.tez.client.TezClient.getTezJarResources(TezClient.java:787)
>       at org.apache.tez.client.TezClient.start(TezClient.java:337)
>       at 
> org.apache.hadoop.hive.ql.exec.tez.TezSessionState.open(TezSessionState.java:191)
>       at 
> org.apache.hadoop.hive.ql.exec.tez.TezTask.updateSession(TezTask.java:234)
>       at org.apache.hadoop.hive.ql.exec.tez.TezTask.execute(TezTask.java:136)
>       at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:160)
>       at 
> org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:88)
>       at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1640)
>       at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1399)
>       at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1183)
>       at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1049)
>       at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1044)
>       at 
> org.apache.hive.service.cli.operation.SQLOperation.runQuery(SQLOperation.java:144)
>       at 
> org.apache.hive.service.cli.operation.SQLOperation.access$100(SQLOperation.java:69)
>       at 
> org.apache.hive.service.cli.operation.SQLOperation$1$1.run(SQLOperation.java:196)
>       at java.security.AccessController.doPrivileged(Native Method)
>       at javax.security.auth.Subject.doAs(Subject.java:415)
>       at 
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1671)
>       at 
> org.apache.hive.service.cli.operation.SQLOperation$1.run(SQLOperation.java:208)
>       at 
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
>       at java.util.concurrent.FutureTask.run(FutureTask.java:262)
>       at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>       at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>       at java.lang.Thread.run(Thread.java:745)
> {noformat}
> I digging into the issue,I found the code snippet in ViewFileSystem.java as 
> follows:
> {noformat}
>  @Override
>     public FileStatus getFileStatus(Path f) throws IOException {
>       checkPathIsSlash(f);
>       return new FileStatus(0, true, 0, 0, creationTime, creationTime,
>           PERMISSION_555, ugi.getUserName(), ugi.getGroupNames()[0],
>           new Path(theInternalDir.fullPath).makeQualified(
>               myUri, ROOT_PATH));
>     }
> {noformat}
> If the node in cluster  haven't creat user like 
> tangjijun,ugi.getGroupNames()[0]  will throw   
> ArrayIndexOutOfBoundsException.Because no user mean no group.
> I create user tangjijun on that node. Then the job was executed normally.  
> I think this code should check  ugi.getGroupNames() is empty.When it is empty 
> ,then print some log. Not to throw exception.



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