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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Assigned: (HADOOP-820) NameNode startup fails if edit log terminates prematurely
Date Tue, 23 Oct 2007 21:01:55 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-820?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Raghu Angadi reassigned HADOOP-820:
-----------------------------------

    Assignee: Raghu Angadi  (was: Sameer Paranjpye)

> NameNode startup fails if edit log terminates prematurely
> ---------------------------------------------------------
>
>                 Key: HADOOP-820
>                 URL: https://issues.apache.org/jira/browse/HADOOP-820
>             Project: Hadoop
>          Issue Type: Bug
>          Components: dfs
>         Environment: ~50 node cluster
>            Reporter: Bryan Pendleton
>            Assignee: Raghu Angadi
>         Attachments: fixNameNodeStartup.patch
>
>
> I ran out of space on the device that stores the edit log, resulting in an edit log that
is truncated mid transaction.
> Ideally, the NameNode should start up, in SafeMode or the like, whenever this happens.
Right now, you get this stack trace:
> 2006-12-12 15:33:57,212 ERROR org.apache.hadoop.dfs.NameNode: java.io.EOFExcepti
> on
>         at java.io.DataInputStream.readUnsignedShort(DataInputStream.java:310)
>         at org.apache.hadoop.io.UTF8.readFields(UTF8.java:104)
>         at org.apache.hadoop.dfs.FSEditLog.loadFSEdits(FSEditLog.java:227)
>         at org.apache.hadoop.dfs.FSImage.loadFSImage(FSImage.java:191)
>         at org.apache.hadoop.dfs.FSDirectory.loadFSImage(FSDirectory.java:320)
>         at org.apache.hadoop.dfs.FSNamesystem.<init>(FSNamesystem.java:226)
>         at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:146)
>         at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:138)
>         at org.apache.hadoop.dfs.NameNode.main(NameNode.java:589)

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