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https://issues.apache.org/jira/browse/HDFS-15862?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17407140#comment-17407140
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Hadoop QA commented on HDFS-15862:
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|| Vote || Subsystem || Runtime ||  Logfile || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 18m 
12s{color} | {color:blue}{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} || ||
| {color:green}+1{color} | {color:green} dupname {color} | {color:green}  0m  
0s{color} | {color:green}{color} | {color:green} No case conflicting files 
found. {color} |
| {color:green}+1{color} | {color:green} {color} | {color:green}  0m  0s{color} 
| {color:green}test4tests{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} 30m 
14s{color} | {color:green}{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
37s{color} | {color:green}{color} | {color:green} trunk passed with JDK 
Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
33s{color} | {color:green}{color} | {color:green} trunk passed with JDK Private 
Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
24s{color} | {color:green}{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
33s{color} | {color:green}{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
19m 32s{color} | {color:green}{color} | {color:green} branch has no errors when 
building and testing our client artifacts. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
41s{color} | {color:green}{color} | {color:green} trunk passed with JDK 
Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
36s{color} | {color:green}{color} | {color:green} trunk passed with JDK Private 
Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10 {color} |
| {color:blue}0{color} | {color:blue} spotbugs {color} | {color:blue} 22m 
10s{color} | {color:blue}{color} | {color:blue} Both FindBugs and SpotBugs are 
enabled, using SpotBugs. {color} |
| {color:green}+1{color} | {color:green} spotbugs {color} | {color:green}  1m 
21s{color} | {color:green}{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} || ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
36s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
33s{color} | {color:green}{color} | {color:green} the patch passed with JDK 
Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
33s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
29s{color} | {color:green}{color} | {color:green} the patch passed with JDK 
Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
29s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
20s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
31s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m 
 0s{color} | {color:green}{color} | {color:green} The patch has no whitespace 
issues. {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
15m 33s{color} | {color:green}{color} | {color:green} patch has no errors when 
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| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
24s{color} | {color:green}{color} | {color:green} the patch passed with JDK 
Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
24s{color} | {color:green}{color} | {color:green} the patch passed with JDK 
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| {color:green}+1{color} | {color:green} spotbugs {color} | {color:green}  1m  
2s{color} | {color:green}{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} || ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  3m  
1s{color} | {color:green}{color} | {color:green} hadoop-hdfs-nfs in the patch 
passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
34s{color} | {color:green}{color} | {color:green} The patch does not generate 
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| {color:black}{color} | {color:black} {color} | {color:black} 98m 56s{color} | 
{color:black}{color} | {color:black}{color} |
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|| Subsystem || Report/Notes ||
| Docker | ClientAPI=1.41 ServerAPI=1.41 base: 
https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/703/artifact/out/Dockerfile
 |
| JIRA Issue | HDFS-15862 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/13032751/HDFS-15862.002.patch |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite 
unit shadedclient spotbugs checkstyle |
| uname | Linux 1f6dfce43943 4.15.0-151-generic #157-Ubuntu SMP Fri Jul 9 
23:07:57 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | dev-support/bin/hadoop.sh |
| git revision | trunk / 164608b5465 |
| Default Java | Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10 |
| Multi-JDK versions | 
/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04 
/usr/lib/jvm/java-8-openjdk-amd64:Private 
Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10 |
|  Test Results | 
https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/703/testReport/ |
| Max. process+thread count | 628 (vs. ulimit of 5500) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs-nfs U: 
hadoop-hdfs-project/hadoop-hdfs-nfs |
| Console output | 
https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/703/console |
| versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
| Powered by | Apache Yetus 0.13.0-SNAPSHOT https://yetus.apache.org |


This message was automatically generated.



> Rename file back to original in TestViewfsWithNfs3.testNfsRenameSingleNN
> ------------------------------------------------------------------------
>
>                 Key: HDFS-15862
>                 URL: https://issues.apache.org/jira/browse/HDFS-15862
>             Project: Hadoop HDFS
>          Issue Type: Test
>            Reporter: Zhengxi Li
>            Assignee: Zhengxi Li
>            Priority: Minor
>              Labels: pull-request-available
>         Attachments: HDFS-15862.001.patch, HDFS-15862.002.patch
>
>          Time Spent: 40m
>  Remaining Estimate: 0h
>
> The 
> 'org.apache.hadoop.hdfs.nfs.nfs3.TestViewfsWithNfs3.testNfsRenameSingleNN' 
> test is not idempotent and fails if run twice in the same JVM, because it 
> pollutes state shared among tests. It may be good to clean this state 
> pollution so that some other tests do not fail in the future due to the 
> shared state polluted by this test.
> Running {{TestViewfsWithNfs3.testNfsRenameSingleNN}} twice would result in 
> the second run failing with a NullPointer exception:
> {noformat}
> [ERROR] Errors:
> [ERROR]   TestViewfsWithNfs3.testNfsRenameSingleNN:317 NullPointer
> {noformat}
> The reason for this is that the {{/user1/renameSingleNN}} file is created in 
> {{setup()}}, but gets renamed in {{testNfsRenameSingl{{eNN}}}}. When the 
> second run of {{testNfsRenameSingleNN}} tries to get info of the file by its 
> original name, it returns a NullPointer since the file no longer exists.
>  
> Link to PR: https://github.com/apache/hadoop/pull/2724



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