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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-10015) UserGroupInformation prints out excessive ERROR warnings
Date Fri, 21 Mar 2014 15:49:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13943169#comment-13943169

Hadoop QA commented on HADOOP-10015:

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:red}-1 tests included{color}.  The patch doesn't appear to include any new or modified
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-common-project/hadoop-common.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/3688//testReport/
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/3688//console

This message is automatically generated.

> UserGroupInformation prints out excessive ERROR warnings
> --------------------------------------------------------
>                 Key: HADOOP-10015
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10015
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 3.0.0
>            Reporter: Haohui Mai
>            Assignee: Nicolas Liochon
>             Fix For: 3.0.0, 2.3.0, 2.4.0
>         Attachments: 10015.v3.patch, 10015.v4.patch, 10015.v5.patch, HADOOP-10015.000.patch,
HADOOP-10015.001.patch, HADOOP-10015.002.patch
> In UserGroupInformation::doAs(), it prints out a log at ERROR level whenever it catches
an exception.
> However, it prints benign warnings in the following paradigm:
> {noformat}
>  try {
>         ugi.doAs(new PrivilegedExceptionAction<FileStatus>() {
>           @Override
>           public FileStatus run() throws Exception {
>             return fs.getFileStatus(nonExist);
>           }
>         });
>       } catch (FileNotFoundException e) {
>       }
> {noformat}
> For example, FileSystem#exists() follows this paradigm. Distcp uses this paradigm too.
The exception is expected therefore there should be no ERROR logs printed in the namenode
> Currently, the user quickly finds out that the namenode log is quickly filled by _benign_
ERROR logs when he or she runs distcp in secure set up. This behavior confuses the operators.
> This jira proposes to move the log to DEBUG level.

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