[
https://issues.apache.org/jira/browse/HDFS-1391?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Matt Foley updated HDFS-1391:
-----------------------------
Issue Type: Sub-task (was: Bug)
Parent: HDFS-2126
> Exiting safemode takes a long time when there are lots of blocks in the HDFS
> ----------------------------------------------------------------------------
>
> Key: HDFS-1391
> URL: https://issues.apache.org/jira/browse/HDFS-1391
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: name-node
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Attachments: 1391_excessReplicas5_comments.txt,
> excessReplicas.1_trunk.txt, excessReplicas2.txt, excessReplicas3.txt,
> excessReplicas5.txt
>
>
> When the namenode decides to exit safemode, it acquires the FSNamesystem
> lock and then iterates over all blocks in the blocksmap to determine if any
> block has any excess replicas. This call takes upwards of 5 minutes on a
> cluster that has 100 million blocks. This delays namenode restart to a good
> extent.
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
