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https://issues.apache.org/jira/browse/HDFS-14423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16905284#comment-16905284
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Hadoop QA commented on HDFS-14423:
----------------------------------

| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  1m  
0s{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:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  1m  
4s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 18m 
38s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 15m 
43s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  2m 
21s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  3m 
12s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
18m 20s{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}  6m 
18s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  2m 
33s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
21s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:red}-1{color} | {color:red} mvninstall {color} | {color:red}  0m 
54s{color} | {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:red}-1{color} | {color:red} compile {color} | {color:red}  2m 
32s{color} | {color:red} root in the patch failed. {color} |
| {color:red}-1{color} | {color:red} javac {color} | {color:red}  2m 32s{color} 
| {color:red} root in the patch failed. {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  2m 
16s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} mvnsite {color} | {color:red}  1m  
3s{color} | {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m 
 0s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:red}-1{color} | {color:red} shadedclient {color} | {color:red}  2m 
57s{color} | {color:red} patch has errors when building and testing our client 
artifacts. {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red}  0m 
20s{color} | {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  2m  
4s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  9m 
17s{color} | {color:green} hadoop-common in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  1m 
50s{color} | {color:green} hadoop-hdfs-client in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}  0m 59s{color} 
| {color:red} hadoop-hdfs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
23s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 98m  3s{color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker | Client=18.09.7 Server=18.09.7 Image:yetus/hadoop:bdbca0e53b4 |
| JIRA Issue | HDFS-14423 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12977358/HDFS-14423.002.patch |
| Optional Tests |  dupname  asflicense  compile  javac  javadoc  mvninstall  
mvnsite  unit  shadedclient  findbugs  checkstyle  |
| uname | Linux 6a6570ebe9ec 4.15.0-52-generic #56-Ubuntu SMP Tue Jun 4 
22:49:08 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / e4b538b |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_212 |
| findbugs | v3.1.0-RC1 |
| mvninstall | 
https://builds.apache.org/job/PreCommit-HDFS-Build/27478/artifact/out/patch-mvninstall-hadoop-hdfs-project_hadoop-hdfs.txt
 |
| compile | 
https://builds.apache.org/job/PreCommit-HDFS-Build/27478/artifact/out/patch-compile-root.txt
 |
| javac | 
https://builds.apache.org/job/PreCommit-HDFS-Build/27478/artifact/out/patch-compile-root.txt
 |
| mvnsite | 
https://builds.apache.org/job/PreCommit-HDFS-Build/27478/artifact/out/patch-mvnsite-hadoop-hdfs-project_hadoop-hdfs.txt
 |
| findbugs | 
https://builds.apache.org/job/PreCommit-HDFS-Build/27478/artifact/out/patch-findbugs-hadoop-hdfs-project_hadoop-hdfs.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HDFS-Build/27478/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/27478/testReport/ |
| Max. process+thread count | 1343 (vs. ulimit of 5500) |
| modules | C: hadoop-common-project/hadoop-common 
hadoop-hdfs-project/hadoop-hdfs-client hadoop-hdfs-project/hadoop-hdfs U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/27478/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> Percent (%) and plus (+) characters no longer work in WebHDFS
> -------------------------------------------------------------
>
>                 Key: HDFS-14423
>                 URL: https://issues.apache.org/jira/browse/HDFS-14423
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: webhdfs
>    Affects Versions: 3.2.0, 3.1.2
>         Environment: Ubuntu 16.04, but I believe this is irrelevant.
>            Reporter: Jing Wang
>            Assignee: Wei-Chiu Chuang
>            Priority: Major
>         Attachments: HDFS-14423.001.patch, HDFS-14423.002.patch
>
>
> The following commands with percent (%) no longer work starting with version 
> 3.1:
> {code:java}
> $ hadoop/bin/hdfs dfs -touchz webhdfs://localhost/%
> $ hadoop/bin/hdfs dfs -cat webhdfs://localhost/%
> cat: URLDecoder: Incomplete trailing escape (%) pattern
> {code}
> Also, plus (+ ) characters get turned into spaces when doing DN operations:
> {code:java}
> $ hadoop/bin/hdfs dfs -touchz webhdfs://localhost/a+b
> $ hadoop/bin/hdfs dfs -mkdir webhdfs://localhost/c+d
> $ hadoop/bin/hdfs dfs -ls /
> Found 4 items
> -rw-r--r--   1 jing supergroup          0 2019-04-12 11:20 /a b
> drwxr-xr-x   - jing supergroup          0 2019-04-12 11:21 /c+d
> {code}
> I can confirm that these commands work correctly on 2.9 and 3.0. Also, the 
> usual hdfs:// client works as expected.
> I suspect a relation with HDFS-13176 or HDFS-13582, but I'm not sure what the 
> right fix is. Note that Hive uses % to escape special characters in partition 
> values, so banning % might not be a good option. For example, Hive will 
> create a paths like {{table_name/partition_key=%2F}} when 
> {{partition_key='/'}}.



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