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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-636) SafeMode should count only complete blocks.
Date Sun, 20 Sep 2009 21:36:15 GMT

    [ https://issues.apache.org/jira/browse/HDFS-636?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12757766#action_12757766
] 

Konstantin Shvachko commented on HDFS-636:
------------------------------------------

tets-core is successful. Here are the test-patch results
{code}
.    [exec] There appear to be 151 release audit warnings before the patch and 151 release
audit warnings after applying the patch.
     [exec] +1 overall.  
     [exec]     +1 @author.  The patch does not contain any @author tags.
     [exec]     +1 tests included.  The patch appears to include 3 new or modified tests.
     [exec]     +1 javadoc.  The javadoc tool did not generate any warning messages.
     [exec]     +1 javac.  The applied patch does not increase the total number of javac compiler
warnings.
     [exec]     +1 findbugs.  The patch does not introduce any new Findbugs warnings.
     [exec]     +1 release audit.  The applied patch does not increase the total number of
release audit warnings.
     [exec] ======================================================================
     [exec] ======================================================================
     [exec]     Finished build.
     [exec] ======================================================================
     [exec] ======================================================================
{code}

> SafeMode should count only complete blocks.
> -------------------------------------------
>
>                 Key: HDFS-636
>                 URL: https://issues.apache.org/jira/browse/HDFS-636
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: name-node
>    Affects Versions: Append Branch
>            Reporter: Konstantin Shvachko
>            Assignee: Konstantin Shvachko
>             Fix For: Append Branch
>
>         Attachments: completeBlockTotal.patch
>
>
> During start up the name-node is in safe mode and is counting blocks reported by data-nodes.
When the number of minimally replicated blocks reaches the configured threshold the name-node
leaves safe mode. Currently all blocks are counted towards the threshold including the ones
that are under construction. The under-construction blocks should be excluded from the count,
because they need to be recovered, which may take long time (lease expires in 1 hour by default).
Also the recovery may result in deleting those blocks so counting them in the blocks total
is incorrect.

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