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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2422) The NN should tolerate the same number of low-resource volumes as failed volumes
Date Wed, 12 Oct 2011 13:11:12 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2422?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13125812#comment-13125812
] 

Hudson commented on HDFS-2422:
------------------------------

Integrated in Hadoop-Mapreduce-0.23-Build #46 (See [https://builds.apache.org/job/Hadoop-Mapreduce-0.23-Build/46/])
    svn merge -c 1181316 from trunk to fix HDFS-2422

atm : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1182219
Files : 
* /hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeResourceChecker.java
* /hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeResourceChecker.java

                
> The NN should tolerate the same number of low-resource volumes as failed volumes
> --------------------------------------------------------------------------------
>
>                 Key: HDFS-2422
>                 URL: https://issues.apache.org/jira/browse/HDFS-2422
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.23.0
>            Reporter: Jeff Bean
>            Assignee: Aaron T. Myers
>             Fix For: 0.23.0
>
>         Attachments: HDFS-2422.patch
>
>
> We encountered a situation where the namenode dropped into safe mode after a temporary
outage of an NFS mount.
> At 12:10 the NFS server goes offline
> Oct  8 12:10:05 <namenode> kernel: nfs: server <nfs host> not responding,
timed out
> This caused the namenode to conclude resource issues:
> 2011-10-08 12:10:34,848 WARN org.apache.hadoop.hdfs.server.namenode.NameNodeResourceChecker:
Space available on volume '<nfs host>' is 0, which is below the configured reserved
amount 104857600
> Temporary loss of NFS mount shouldn't cause safemode.

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