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https://issues.apache.org/jira/browse/HDFS-645?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Allen Wittenauer resolved HDFS-645.
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Resolution: Fixed
This was fixed in 1.x at some point.
> Namenode does not leave safe mode even if all blocks are available
> ------------------------------------------------------------------
>
> Key: HDFS-645
> URL: https://issues.apache.org/jira/browse/HDFS-645
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 0.20.1, 0.21.0, 0.22.0
> Reporter: Qi Liu
> Assignee: Qi Liu
> Attachments: HDFS-645-0.18.3.patch, HDFS-645-0.20.1.patch,
> HDFS-645.patch, HDFS-645.patch
>
>
> When the safe mode threshold is set to 1.0f, sometimes the name node does not
> leave safe mode even if all blocks are available. This is caused by floating
> point number division and comparison issues.
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