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https://issues.apache.org/jira/browse/HDFS-2280?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Konstantin Shvachko updated HDFS-2280:
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Attachment: checksumException.patch
In the patch I
# set {{imageDigest}} to null in {{BackupStorage.reset()}} to make sure the old
digest is not interfering with newly loaded images.
# and populate {{imageDigest}} obtained from NN to BN's {{imageDigest}} before
the new image is loaded on BN in order to ensure it is verified against the
expected value.
> BackupNode fails with MD5 checksum Exception during checkpoint if BN's image
> is outdated.
> -----------------------------------------------------------------------------------------
>
> Key: HDFS-2280
> URL: https://issues.apache.org/jira/browse/HDFS-2280
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 0.22.0
> Reporter: Konstantin Shvachko
> Assignee: Konstantin Shvachko
> Fix For: 0.22.0
>
> Attachments: checksumException.patch
>
>
> If BN starts after NN made changes to namespace it fails with MD5 checksum
> Exception during checkpoint when it reads new image upload from NN. This is
> happening because {{imageDigest}} is not reset to null, but keeps the value
> of the originally loaded BN image.
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