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https://issues.apache.org/jira/browse/HADOOP-7172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13008833#comment-13008833
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Hadoop QA commented on HADOOP-7172:
-----------------------------------
+1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12473024/hadoop-7172.txt
against trunk revision 1082788.
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 3 new or modified tests.
+1 javadoc. The javadoc tool did not generate any warning messages.
+1 javac. The applied patch does not increase the total number of javac
compiler warnings.
+1 findbugs. The patch does not introduce any new Findbugs (version 1.3.9)
warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
+1 core tests. The patch passed core unit tests.
+1 contrib tests. The patch passed contrib unit tests.
+1 system test framework. The patch passed system test framework compile.
Test results:
https://hudson.apache.org/hudson/job/PreCommit-HADOOP-Build/312//testReport/
Findbugs warnings:
https://hudson.apache.org/hudson/job/PreCommit-HADOOP-Build/312//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output:
https://hudson.apache.org/hudson/job/PreCommit-HADOOP-Build/312//console
This message is automatically generated.
> SecureIO should not check owner on non-secure clusters that have no native
> support
> ----------------------------------------------------------------------------------
>
> Key: HADOOP-7172
> URL: https://issues.apache.org/jira/browse/HADOOP-7172
> Project: Hadoop Common
> Issue Type: Bug
> Components: io, security
> Affects Versions: 0.22.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Critical
> Fix For: 0.22.0
>
> Attachments: hadoop-7172.txt, hadoop-7172.txt, hadoop-7172.txt
>
>
> The SecureIOUtils.openForRead function currently uses a racy stat/open combo
> if security is disabled and the native libraries are not available. This ends
> up shelling out to "ls -ld" which is very very slow. We've seen this cause
> significant performance regressions on clusters that match this profile.
> Since the racy permissions check doesn't buy us any security anyway, we
> should just fall back to a normal "open" without any stat() at all, if we
> can't use the native support to do it efficiently.
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