hadoop-common-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Ravi Prakash (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-6963) Fix FileUtil.getDU. It should not include the size of the directory or follow symbolic links
Date Fri, 30 Mar 2012 15:48:28 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-6963?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ravi Prakash updated HADOOP-6963:
---------------------------------

          Description: 
The getDU method should not include the size of the directory. The Java interface says that
the value is undefined and in Linux/Sun it gets the 4096 for the inode. Clearly this isn't
useful.
It also recursively calls itself. In case the directory has a symbolic link forming a cycle,
getDU keeps spinning in the cycle. In our case, we saw this in the org.apache.hadoop.mapred.JobLocalizer.downloadPrivateCacheObjects
call. This prevented other tasks on the same node from committing, causing the TT to become
effectively useless (because the JT thinks it already has enough tasks running)

  was:The getDU method should not include the size of the directory. The Java interface says
that the value is undefined and in Linux/Sun it gets the 4096 for the inode. Clearly this
isn't useful.

             Priority: Critical  (was: Major)
     Target Version/s: 1.0.2
    Affects Version/s: 0.20.205.0
              Summary: Fix FileUtil.getDU. It should not include the size of the directory
or follow symbolic links  (was: FileUtil.getDU should not include the size of the directory)
    
> Fix FileUtil.getDU. It should not include the size of the directory or follow symbolic
links
> --------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-6963
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6963
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 0.20.205.0
>            Reporter: Owen O'Malley
>            Assignee: Owen O'Malley
>            Priority: Critical
>
> The getDU method should not include the size of the directory. The Java interface says
that the value is undefined and in Linux/Sun it gets the 4096 for the inode. Clearly this
isn't useful.
> It also recursively calls itself. In case the directory has a symbolic link forming a
cycle, getDU keeps spinning in the cycle. In our case, we saw this in the org.apache.hadoop.mapred.JobLocalizer.downloadPrivateCacheObjects
call. This prevented other tasks on the same node from committing, causing the TT to become
effectively useless (because the JT thinks it already has enough tasks running)

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message