Created: (HADOOP-2159) Namenode stuck in safemode

Namenode stuck in safemode
--------------------------

                 Key: HADOOP-2159
                 URL: htt
ps://issues.apache.org/jira/browse/HADOOP-2159
             Project: Hadoop
          Issue Type: Bug
          Components: dfs
    Affects Versions: 0.16.0
            Reporter: Christian Kunz


Occasionally (not easy to reproduce) the namenode does turn
off safemode automatically, although fsck does not report
any missing or under-replicated blocks (safemode threshold
set to 1.0).

At this moment I do not have any additional information
which could help analyze the issue.

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Owen O'Malley commented on HADOOP-2159:
---------------------------------------

I would check for floating point precision problems. If the
calculation was done carelessly, you may end up not being
able to reach the desired goal of 1.0.

> Namenode stuck in safemode
> --------------------------
>
>                 Key: HADOOP-2159
>                 URL: htt
ps://issues.apache.org/jira/browse/HADOOP-2159
>             Project: Hadoop
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.16.0
>            Reporter: Christian Kunz
>
> Occasionally (not easy to reproduce) the namenode does
turn off safemode automatically, although fsck does not
report any missing or under-replicated blocks (safemode
threshold set to 1.0).
> At this moment I do not have any additional information
which could help analyze the issue.

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Konstantin Shvachko commented on HADOOP-2159:
---------------------------------------------

Did you mean to say:
the namenode does +*NOT*+ turn off safemode automatically

> Namenode stuck in safemode
> --------------------------
>
>                 Key: HADOOP-2159
>                 URL: htt
ps://issues.apache.org/jira/browse/HADOOP-2159
>             Project: Hadoop
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.16.0
>            Reporter: Christian Kunz
>
> Occasionally (not easy to reproduce) the namenode does
turn off safemode automatically, although fsck does not
report any missing or under-replicated blocks (safemode
threshold set to 1.0).
> At this moment I do not have any additional information
which could help analyze the issue.

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    [ https://issues.apache.org/jira/browse
/HADOOP-2159?page=com.atlassian.jira.plugin.system.issuetabp
anels:comment-tabpanel#action_12540522 ] 

Christian Kunz commented on HADOOP-2159:
----------------------------------------

Yes, I missed the *not*. Thanks for pointing out.

> Namenode stuck in safemode
> --------------------------
>
>                 Key: HADOOP-2159
>                 URL: htt
ps://issues.apache.org/jira/browse/HADOOP-2159
>             Project: Hadoop
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.16.0
>            Reporter: Christian Kunz
>
> Occasionally (not easy to reproduce) the namenode does
turn off safemode automatically, although fsck does not
report any missing or under-replicated blocks (safemode
threshold set to 1.0).
> At this moment I do not have any additional information
which could help analyze the issue.

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You can reply to this email to add a comment to the issue
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