You are viewing a plain text version of this content. The canonical link for it is here.

Posted to hdfs-issues@hadoop.apache.org by "Suresh Srinivas (JIRA)" <ji...@apache.org> on 2011/03/25 23:31:06 UTC

[jira] [Commented] (HDFS-1541) Not marking datanodes dead When namenode in safemode

    [ https://issues.apache.org/jira/browse/HDFS-1541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13011456#comment-13011456 ] 

Suresh Srinivas commented on HDFS-1541:
---------------------------------------

I committed the patch to branch-0.20-security


> Not marking datanodes dead When namenode in safemode
> ----------------------------------------------------
>
>                 Key: HDFS-1541
>                 URL: https://issues.apache.org/jira/browse/HDFS-1541
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>    Affects Versions: 0.23.0
>            Reporter: Hairong Kuang
>            Assignee: Hairong Kuang
>             Fix For: 0.23.0
>
>         Attachments: deadnodescheck.patch, deadnodescheck1.patch, deadnodescheck1_0.20-security.patch
>
>
> In a big cluster, when namenode starts up,  it takes a long time for namenode to process block reports from all datanodes. Because heartbeats processing get delayed, some datanodes are erroneously marked as dead, then later on they have to register again, thus wasting time.
> It would speed up starting time if the checking of dead nodes is disabled when namenode in safemode.

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira