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From "Nicolas Liochon (JIRA)" <j...@apache.org>
Subject [jira] [Reopened] (HADOOP-10015) UserGroupInformation prints out excessive ERROR warnings
Date Wed, 12 Mar 2014 17:48:44 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-10015?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Nicolas Liochon reopened HADOOP-10015:
--------------------------------------

      Assignee: Nicolas Liochon  (was: Haohui Mai)

> UserGroupInformation prints out excessive ERROR warnings
> --------------------------------------------------------
>
>                 Key: HADOOP-10015
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10015
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Haohui Mai
>            Assignee: Nicolas Liochon
>         Attachments: 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
logs.
> 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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