hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jitendra Nath Pandey (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-1257) Race condition on FSNamesystem#recentInvalidateSets introduced by HADOOP-5124
Date Mon, 07 Nov 2011 22:46:51 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13145903#comment-13145903
] 

Jitendra Nath Pandey commented on HDFS-1257:
--------------------------------------------

I just realized that Ramkumar uploaded a patch same as mine long time back. I still believe
this patch is sufficient for the fix in 20 branch.
                
> Race condition on FSNamesystem#recentInvalidateSets introduced by HADOOP-5124
> -----------------------------------------------------------------------------
>
>                 Key: HDFS-1257
>                 URL: https://issues.apache.org/jira/browse/HDFS-1257
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.23.0
>            Reporter: Ramkumar Vadali
>            Assignee: Eric Payne
>             Fix For: 0.23.0
>
>         Attachments: HDFS-1257-branch-0.20-security.patch, HDFS-1257.1.20110810.patch,
HDFS-1257.2.20110812.patch, HDFS-1257.3.20110815.patch, HDFS-1257.4.20110816.patch, HDFS-1257.5.20110817.patch,
HDFS-1257.patch
>
>
> HADOOP-5124 provided some improvements to FSNamesystem#recentInvalidateSets. But it introduced
unprotected access to the data structure recentInvalidateSets. Specifically, FSNamesystem.computeInvalidateWork
accesses recentInvalidateSets without read-lock protection. If there is concurrent activity
(like reducing replication on a file) that adds to recentInvalidateSets, the name-node crashes
with a ConcurrentModificationException.

--
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