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Posted to hdfs-dev@hadoop.apache.org by "Konstantin Shvachko (JIRA)" <ji...@apache.org> on 2009/09/21 01:28:15 UTC

[jira] Resolved: (HDFS-636) SafeMode should count only complete blocks.

     [ https://issues.apache.org/jira/browse/HDFS-636?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Konstantin Shvachko resolved HDFS-636.
--------------------------------------

    Resolution: Fixed

I just committed this.

> 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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