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https://issues.apache.org/jira/browse/HDFS-15932?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17310938#comment-17310938
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Hadoop QA commented on HDFS-15932:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime ||  Logfile || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  1m 
23s{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} @author {color} | {color:green}  0m  
0s{color} | {color:green}{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}{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:brown} trunk Compile Tests {color} || ||
| {color:red}-1{color} | {color:red} mvninstall {color} | {color:red} 24m  
5s{color} | 
{color:red}https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/560/artifact/out/branch-mvninstall-root.txt{color}
 | {color:red} root in trunk failed. {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 
27s{color} | {color:green}{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
15m 29s{color} | {color:green}{color} | {color:green} branch has no errors when 
building and testing our client artifacts. {color} |
|| || || || {color:brown} Patch Compile Tests {color} || ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
59s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 
18s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} shellcheck {color} | {color:green}  0m 
 4s{color} | {color:green}{color} | {color:green} There were no new shellcheck 
issues. {color} |
| {color:green}+1{color} | {color:green} shelldocs {color} | {color:green}  0m 
15s{color} | {color:green}{color} | {color:green} There were no new shelldocs 
issues. {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 19s{color} | {color:green}{color} | {color:green} patch has no errors when 
building and testing our client artifacts. {color} |
|| || || || {color:brown} Other Tests {color} || ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  1m 
49s{color} | {color:green}{color} | {color:green} hadoop-common in the patch 
passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
43s{color} | {color:green}{color} | {color:green} The patch does not generate 
ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 63m 39s{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/560/artifact/out/Dockerfile
 |
| JIRA Issue | HDFS-15932 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/13023134/HDFS-15932.001.patch |
| Optional Tests | dupname asflicense mvnsite unit shellcheck shelldocs |
| uname | Linux 59d22c2cc7e9 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 
23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | personality/hadoop.sh |
| git revision | trunk / 90fdd04f544 |
|  Test Results | 
https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/560/testReport/ |
| Max. process+thread count | 721 (vs. ulimit of 5500) |
| modules | C: hadoop-common-project/hadoop-common U: 
hadoop-common-project/hadoop-common |
| Console output | 
https://ci-hadoop.apache.org/job/PreCommit-HDFS-Build/560/console |
| versions | git=2.25.1 maven=3.6.3 shellcheck=0.7.0 |
| Powered by | Apache Yetus 0.13.0-SNAPSHOT https://yetus.apache.org |


This message was automatically generated.



> Improve the balancer error message when process exits abnormally.
> -----------------------------------------------------------------
>
>                 Key: HDFS-15932
>                 URL: https://issues.apache.org/jira/browse/HDFS-15932
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Renukaprasad C
>            Assignee: Renukaprasad C
>            Priority: Major
>         Attachments: HDFS-15932.001.patch
>
>
> The HDFS balancer exits abnormally. The content of the pid file is not 
> cleaned up, and the new balancer cannot be started.
> Start the balancer (start-balancer.sh threshold 5)
> Kill the balancer process (kill -9 <Balancer PID>)
> Re-execute the balancer, there will be an error message.
> -- Balancer is running as process  xxxx. Stop it first. 
> (But process already stopped, error message can be more detailed)



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