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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HDFS-1481) NameNode should validate fsimage before rolling
Date Wed, 10 Nov 2010 00:27:11 GMT

     [ https://issues.apache.org/jira/browse/HDFS-1481?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hairong Kuang updated HDFS-1481:
--------------------------------

    Attachment: trunkValidateUpload.patch

This patch calculates checksum when NameNode download image from Secondary or Checkpointing
NameNode. If the calculated checksum does not match the one supposed to be, it fails the image
transfer.

> NameNode should validate fsimage before rolling
> -----------------------------------------------
>
>                 Key: HDFS-1481
>                 URL: https://issues.apache.org/jira/browse/HDFS-1481
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>    Affects Versions: 0.22.0
>            Reporter: Hairong Kuang
>            Assignee: Hairong Kuang
>             Fix For: 0.22.0
>
>         Attachments: trunkValidateUpload.patch
>
>
> We had an incident that the fsimage at secondary NameNode was truncated but got uploaded
to the primary NameNode. The primary NameNode simply rolled the image without checking its
integrity, therefore causing the fsimage to corrupt. The primary NameNode should check the
new image's integrity before rolling fsimage.

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