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https://issues.apache.org/jira/browse/HADOOP-16167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16793904#comment-16793904
 ] 

Hadoop QA commented on HADOOP-16167:
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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}  0m 
27s{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: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:brown} trunk Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 21m 
29s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 
29s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
12m  3s{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} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 
22s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} shellcheck {color} | {color:green}  0m 
 4s{color} | {color:green} There were no new shellcheck issues. {color} |
| {color:green}+1{color} | {color:green} shelldocs {color} | {color:green}  0m 
11s{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} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
12m 54s{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}  2m 
21s{color} | {color:green} hadoop-common in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
33s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 54m 33s{color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:8f97d6f |
| JIRA Issue | HADOOP-16167 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12962642/HADOOP-16167.004.patch
 |
| Optional Tests |  dupname  asflicense  mvnsite  unit  shellcheck  shelldocs  |
| uname | Linux 030b3bf2c6e7 4.4.0-138-generic #164~14.04.1-Ubuntu SMP Fri Oct 
5 08:56:16 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / ff06ef0 |
| maven | version: Apache Maven 3.3.9 |
| shellcheck | v0.4.6 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/16058/testReport/ |
| Max. process+thread count | 306 (vs. ulimit of 10000) |
| modules | C: hadoop-common-project/hadoop-common U: 
hadoop-common-project/hadoop-common |
| Console output | 
https://builds.apache.org/job/PreCommit-HADOOP-Build/16058/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> "hadoop CLASSFILE" prints error messages on Ubuntu 18
> -----------------------------------------------------
>
>                 Key: HADOOP-16167
>                 URL: https://issues.apache.org/jira/browse/HADOOP-16167
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: scripts
>    Affects Versions: 3.2.0
>            Reporter: Daniel Templeton
>            Assignee: Daniel Templeton
>            Priority: Major
>         Attachments: HADOOP-16167.001.patch, HADOOP-16167.002.patch, 
> HADOOP-16167.003.patch, HADOOP-16167.004.patch
>
>
> {noformat}
> # hadoop org.apache.hadoop.conf.Configuration
> /usr/lib/hadoop/bin/../lib/hadoop/libexec//hadoop-functions.sh: line 2366: 
> HADOOP_ORG.APACHE.HADOOP.CONF.CONFIGURATION_USER: bad substitution
> /usr/lib/hadoop/bin/../lib/hadoop/libexec//hadoop-functions.sh: line 2331: 
> HADOOP_ORG.APACHE.HADOOP.CONF.CONFIGURATION_USER: bad substitution
> /usr/lib/hadoop/bin/../lib/hadoop/libexec//hadoop-functions.sh: line 2426: 
> HADOOP_ORG.APACHE.HADOOP.CONF.CONFIGURATION_OPTS: bad substitution
> {noformat}
> The issue is a regression in bash 4.4.  See 
> [here|http://savannah.gnu.org/support/?109649].  The extraneous output can 
> break scripts that read the command output.
> According to [~aw]:
> {quote}Oh, I think I see the bug.  HADOOP_SUBCMD (and equivalents in yarn, 
> hdfs, etc) just needs some special handling when a custom method is being 
> called.  For example, there’s no point in checking to see if it should run 
> with privileges, so just skip over that.  Probably a few other places too.  
> Relatively easy fix.  2 lines of code, maybe.{quote}



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