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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4961) ConcurrentModificationException in lease recovery of empty files.
Date Wed, 31 Dec 2008 11:54:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12660071#action_12660071
] 

Tsz Wo (Nicholas), SZE commented on HADOOP-4961:
------------------------------------------------

{noformat}
     [exec] +1 overall.  
     [exec] 
     [exec]     +1 @author.  The patch does not contain any @author tags.
     [exec] 
     [exec]     +1 tests included.  The patch appears to include 3 new or modified tests.
     [exec] 
     [exec]     +1 javadoc.  The javadoc tool did not generate any warning messages.
     [exec] 
     [exec]     +1 javac.  The applied patch does not increase the total number of javac compiler
warnings.
     [exec] 
     [exec]     +1 findbugs.  The patch does not introduce any new Findbugs warnings.
     [exec] 
     [exec]     +1 Eclipse classpath. The patch retains Eclipse classpath integrity.
{noformat}

> ConcurrentModificationException in lease recovery of empty files.
> -----------------------------------------------------------------
>
>                 Key: HADOOP-4961
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4961
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.18.0
>            Reporter: Konstantin Shvachko
>            Assignee: Konstantin Shvachko
>            Priority: Blocker
>             Fix For: 0.18.3
>
>         Attachments: CMEinLeaseRecovery-0-18.patch, CMEinLeaseRecovery.patch, TestLeaseExpire.java
>
>
> The problem is that internalReleaseLease() finalizes empty files, which removes these
file path names from the lease. So this modifies the Collection of file names which {{LeaseManager.checkLeases()}}
is iterating on.

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