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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1219) Data Loss due to edits log truncation
Date Thu, 17 Jun 2010 17:31:28 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12879851#action_12879851
] 

Allen Wittenauer commented on HDFS-1219:
----------------------------------------

Then how would the world know how awesome their framework is?  

> Data Loss due to edits log truncation
> -------------------------------------
>
>                 Key: HDFS-1219
>                 URL: https://issues.apache.org/jira/browse/HDFS-1219
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.20.2
>            Reporter: Thanh Do
>
> We found this problem almost at the same time as HDFS developers.
> Basically, the edits log is truncated before fsimage.ckpt is renamed to fsimage.
> Hence, any crash happens after the truncation but before the renaming will lead
> to a data loss. Detailed description can be found here:
> https://issues.apache.org/jira/browse/HDFS-955
> This bug was found by our Failure Testing Service framework:
> http://www.eecs.berkeley.edu/Pubs/TechRpts/2010/EECS-2010-98.html
> For questions, please email us: Thanh Do (thanhdo@cs.wisc.edu) and 
> Haryadi Gunawi (haryadi@eecs.berkeley.edu

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