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https://issues.apache.org/jira/browse/HDFS-2002?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13039447#comment-13039447
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Konstantin Shvachko commented on HDFS-2002:
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In case there are 3 blocks in the system with the default threshold 0.9990, and
with no replicas reported yet the safemode tip says:
_*{{Safe mode is ON. The reported blocks 0 needs additional 2 blocks to reach
the threshold 0.9990 of total blocks 3. Safe mode will be turned off
automatically.}}*_
While it should report one more _*{{needs additional 3 blocks}}*_.
And when the threshold is set larger than one, say 1.5, the numbers don't make
any sense at all.
> Incorrect computation of needed blocks in getTurnOffTip()
> ---------------------------------------------------------
>
> Key: HDFS-2002
> URL: https://issues.apache.org/jira/browse/HDFS-2002
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 0.22.0
> Reporter: Konstantin Shvachko
> Fix For: 0.22.0
>
>
> {{SafeModeInfo.getTurnOffTip()}} under-reports the number of blocks needed to
> reach the safemode threshold.
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