[ 
https://issues.apache.org/jira/browse/HDFS-15128?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17021712#comment-17021712
 ] 

Hadoop QA commented on HDFS-15128:
----------------------------------

| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 33m 
49s{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} 26m 
13s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m  
4s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
44s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m  
7s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
14m 38s{color} | {color:green} branch has no errors when building and testing 
our client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  2m 
18s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
13s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m 
 2s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
58s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
58s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
37s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m  
2s{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} 
14m 37s{color} | {color:green} patch has no errors when building and testing 
our client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  2m 
46s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
34s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red}126m 48s{color} 
| {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  2m 
15s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}232m 52s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.hdfs.tools.TestDFSAdminWithHA |
|   | hadoop.hdfs.TestEncryptionZonesWithKMS |
|   | hadoop.hdfs.TestDFSStripedOutputStream |
|   | hadoop.hdfs.TestDFSStripedInputStream |
|   | hadoop.hdfs.TestMultipleNNPortQOP |
|   | hadoop.hdfs.TestFileChecksum |
|   | hadoop.hdfs.TestDecommissionWithStriped |
|   | hadoop.hdfs.TestFileChecksumCompositeCrc |
\\
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|| Subsystem || Report/Notes ||
| Docker | Client=19.03.5 Server=19.03.5 Image:yetus/hadoop:c44943d1fc3 |
| JIRA Issue | HDFS-15128 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12991568/HDFS-15128-000.patch |
| Optional Tests |  dupname  asflicense  compile  javac  javadoc  mvninstall  
mvnsite  unit  shadedclient  findbugs  checkstyle  |
| uname | Linux 4e3db9017c5f 4.15.0-74-generic #84-Ubuntu SMP Thu Dec 19 
08:06:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / 9520b2ad |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_232 |
| findbugs | v3.1.0-RC1 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/28701/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/28701/testReport/ |
| Max. process+thread count | 2686 (vs. ulimit of 5500) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs U: 
hadoop-hdfs-project/hadoop-hdfs |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/28701/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> Unit test failing to clean testing data and crashed future Maven test run
> -------------------------------------------------------------------------
>
>                 Key: HDFS-15128
>                 URL: https://issues.apache.org/jira/browse/HDFS-15128
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs, test
>    Affects Versions: 3.2.1
>            Reporter: Ctest
>            Priority: Critical
>              Labels: easyfix, patch, test
>         Attachments: HDFS-15128-000.patch, HDFS-15128-000.patch
>
>
> Actively-used test helper function `testVolumeConfig` in 
> `org.apache.hadoop.hdfs.server.datanode.TestDataNodeVolumeFailureToleration` 
> chmod a directory with invalid perm 000 for testing purposes but later failed 
> to chmod back this directory with a valid perm if the assertion inside this 
> function failed. Any subsequent `mvn test` command would fail to run if this 
> test had failed before. It is because Maven failed to build itself as it did 
> not have permission to clean the temporarily-generated directory that has 
> perm 000. See below for the code snippet that is buggy.
> {code:java}
> try {
>       for (int i = 0; i < volumesFailed; i++) {
>         prepareDirToFail(dirs[i]); // this will chmod dirs[i] to perm 000
>       }
>       restartDatanodes(volumesTolerated, manageDfsDirs);
>     } catch (DiskErrorException e) {
>      ...
>     } finally {
> ...
>     }
>  
>       assertEquals(expectedBPServiceState, bpServiceState);
>  
>       for (File dir : dirs) {
>         FileUtil.chmod(dir.toString(), "755");
>       }
>     }
> {code}
> The failure of the statement `assertEquals(expectedBPServiceState, 
> bpServiceState)` caused function to terminate without executing 
> `FileUtil.chmod(dir.toString(), "755")` for each temporary directory with 
> invalid perm 000 the test has created. 
>  
> *Consequence*
> Any subsequent `mvn test` command would fail to run if this test had failed 
> before. It is because Maven failed to build itself since it does not have 
> permission to clean this temporarily-generated directory. For details of the 
> failure, see below:
> {noformat}
> [INFO] --- maven-antrun-plugin:1.7:run (create-log-dir) @ hadoop-hdfs ---
> [INFO] Executing tasks
>  
> main:
> [delete] Deleting directory 
> /home/ctest/app/Ctest-Hadoop/hadoop-hdfs-project/hadoop-hdfs/target/test/data
> [INFO] 
> ------------------------------------------------------------------------
> [INFO] BUILD FAILURE
> [INFO] 
> ------------------------------------------------------------------------
> [INFO] Total time:  8.349 s
> [INFO] Finished at: 2019-12-27T03:53:04-06:00
> [INFO] 
> ------------------------------------------------------------------------
> [ERROR] Failed to execute 
> goalorg.apache.maven.plugins:maven-antrun-plugin:1.7:run (create-log-dir) on 
> project hadoop-hdfs: An Ant BuildException has occured: Unable to delete 
> directory 
> /home/ctest/app/Ctest-Hadoop/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/data/data1/current
> [ERROR] around Ant part ...<delete 
> dir="/home/ctest/app/Ctest-Hadoop/hadoop-hdfs-project/hadoop-hdfs/target/test/data"/>...
>  @ 4:105 in 
> /home/ctest/app/Ctest-Hadoop/hadoop-hdfs-project/hadoop-hdfs/target/antrun/build-main.xml
> [ERROR] -> [Help 1]
> [ERROR]
> [ERROR] To see the full stack trace of the errors, re-run Maven with the -e 
> switch.
> [ERROR] Re-run Maven using the -X switch to enable full debug logging.
> [ERROR]
> [ERROR] For more information about the errors and possible solutions, please 
> read the following articles:
> [ERROR] [Help 1] 
> http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException{noformat}
>  
> *Root Cause*
> The test helper function 
> `org.apache.hadoop.hdfs.server.datanode.TestDataNodeVolumeFailureToleration#testVolumeConfig`
>  purposely set the directory 
> `/home/ctest/app/Ctest-Hadoop/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/data/data1/current`
>  to have perm 000. And at the end of this function, it changed the perm of 
> this directory to 755. However, there is an assertion in this function before 
> the perm was able to changed to 755. Once this assertion fails, the function 
> terminates before the directory’s perm can be changed to 755. Hence, this 
> directory was later unable to be removed by Maven for when executing `mvn 
> test`. 
>  
> *Fix*
> In 
> `org.apache.hadoop.hdfs.server.datanode.TestDataNodeVolumeFailureToleration#testVolumeConfig`,
>  move the assertion `assertEquals(expectedBPServiceState, bpServiceState)`  
> to the last line of this function. This fix will fix the bug and will not 
> change the test outcome. 



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