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https://issues.apache.org/jira/browse/HADOOP-12436?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14956164#comment-14956164
]
Hadoop QA commented on HADOOP-12436:
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| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch | 21m 19s | Pre-patch trunk compilation is
healthy. |
| {color:green}+1{color} | @author | 0m 0s | The patch does not contain any
@author tags. |
| {color:green}+1{color} | tests included | 0m 0s | The patch appears to
include 1 new or modified test files. |
| {color:green}+1{color} | javac | 9m 3s | There were no new javac warning
messages. |
| {color:green}+1{color} | javadoc | 12m 46s | There were no new javadoc
warning messages. |
| {color:green}+1{color} | release audit | 0m 30s | The applied patch does
not increase the total number of release audit warnings. |
| {color:green}+1{color} | checkstyle | 1m 28s | There were no new checkstyle
issues. |
| {color:green}+1{color} | whitespace | 0m 0s | The patch has no lines that
end in whitespace. |
| {color:green}+1{color} | install | 2m 4s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse | 0m 49s | The patch built with
eclipse:eclipse. |
| {color:green}+1{color} | findbugs | 2m 21s | The patch does not introduce
any new Findbugs (version 3.0.0) warnings. |
| {color:green}+1{color} | common tests | 8m 46s | Tests passed in
hadoop-common. |
| | | 59m 10s | |
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|| Subsystem || Report/Notes ||
| Patch URL |
http://issues.apache.org/jira/secure/attachment/12766441/HADOOP-12436.04.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 40cac59 |
| hadoop-common test log |
https://builds.apache.org/job/PreCommit-HADOOP-Build/7807/artifact/patchprocess/testrun_hadoop-common.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-HADOOP-Build/7807/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf901.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP
PREEMPT Wed Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Console output |
https://builds.apache.org/job/PreCommit-HADOOP-Build/7807/console |
This message was automatically generated.
> GlobPattern regex library has performance issues with wildcard characters
> -------------------------------------------------------------------------
>
> Key: HADOOP-12436
> URL: https://issues.apache.org/jira/browse/HADOOP-12436
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs
> Affects Versions: 2.2.0, 2.7.1
> Reporter: Matthew Paduano
> Assignee: Matthew Paduano
> Attachments: HADOOP-12436.01.patch, HADOOP-12436.02.patch,
> HADOOP-12436.03.patch, HADOOP-12436.04.patch
>
>
> java.util.regex classes have performance problems with certain wildcard
> patterns. Namely, consecutive * characters in a file name (not properly
> escaped as literals) will cause commands such as "hadoop fs -ls
> file******name" to consume 100% CPU and probably never return in a reasonable
> time (time scales with number of *'s).
> Here is an example:
> {noformat}
> hadoop fs -touchz
> /user/mattp/job_1429571161900_4222-1430338332599-tda%2D%2D\\\+\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\*\\\+\\\+\\\+...%270%27%28Stage-1430338580443-39-2000-SUCCEEDED-production%2Dhigh-1430338340360.jhist
> hadoop fs -ls
> /user/mattp/job_1429571161900_4222-1430338332599-tda%2D%2D+******************************+++...%270%27%28Stage-1430338580443-39-2000-SUCCEEDED-production%2Dhigh-1430338340360.jhist
> {noformat}
> causes:
> {noformat}
> PID COMMAND %CPU TIME
> 14526 java 100.0 01:18.85
> {noformat}
> Not every string of *'s causes this, but the above filename reproduces this
> reliably.
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