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Posted to hdfs-dev@hadoop.apache.org by "Todd Lipcon (Created) (JIRA)" <ji...@apache.org> on 2012/01/17 20:29:44 UTC
[jira] [Created] (HDFS-2804) SBN should not mark blocks
under-replicated when exiting safemode
SBN should not mark blocks under-replicated when exiting safemode
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Key: HDFS-2804
URL: https://issues.apache.org/jira/browse/HDFS-2804
Project: Hadoop HDFS
Issue Type: Sub-task
Components: ha, name-node
Affects Versions: HA branch (HDFS-1623)
Reporter: Todd Lipcon
Assignee: Todd Lipcon
In testing on a cluster, I restarted with one fewer datanodes than previously. This caused a few thousand blocks to be under-replicated. Similar to HDFS-2795, I saw the under-replicated blocks on the SBN, slowly decreasing as the replication thread ran. This seems to be because we process the replication queue when exiting safemode, even if in standby mode. It also reports many "missing blocks" in the NN UI which are slowly decreasing.
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[jira] [Resolved] (HDFS-2804) SBN should not mark blocks
under-replicated when exiting safemode
Posted by "Todd Lipcon (Resolved) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-2804?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Todd Lipcon resolved HDFS-2804.
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Resolution: Fixed
Fix Version/s: HA branch (HDFS-1623)
Hadoop Flags: Reviewed
I ran the HA tests with this patch applied and they all passed. Committed to branch, thanks Eli.
> SBN should not mark blocks under-replicated when exiting safemode
> -----------------------------------------------------------------
>
> Key: HDFS-2804
> URL: https://issues.apache.org/jira/browse/HDFS-2804
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha, name-node
> Affects Versions: HA branch (HDFS-1623)
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: HA branch (HDFS-1623)
>
> Attachments: hdfs-2804.txt, hdfs-2804.txt
>
>
> In testing on a cluster, I restarted with one fewer datanodes than previously. This caused a few thousand blocks to be under-replicated. Similar to HDFS-2795, I saw the under-replicated blocks on the SBN, slowly decreasing as the replication thread ran. This seems to be because we process the replication queue when exiting safemode, even if in standby mode. It also reports many "missing blocks" in the NN UI which are slowly decreasing.
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