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https://issues.apache.org/jira/browse/HADOOP-5193?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Konstantin Shvachko updated HADOOP-5193:
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Attachment: EditsLength.patch
This changes calculation of the edits length.
I also removed {{length()}} method from{{ EditLogOutputStream}}, because this
was the only use case for it.
> SecondaryNameNode does not rollImage because of incorrect calculation of
> edits modification time.
> -------------------------------------------------------------------------------------------------
>
> Key: HADOOP-5193
> URL: https://issues.apache.org/jira/browse/HADOOP-5193
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.19.0
> Reporter: Konstantin Shvachko
> Assignee: Konstantin Shvachko
> Fix For: 0.19.1
>
> Attachments: EditsLength.patch
>
>
> Secondary name-node cannot complete the second phase of the checkpoint
> because getFsEditsTime() returns the mod time of {{edits.new}} rather than
> {{edits}} file.
> The difference is that {{edits}} remains unchanged during the whole
> checkpoint process an therefore can serve as an invariant. On the contrary
> {{edits.new}} is changing all the time since it is the target of the edits
> log during checkpoint. So comparison of the mod time of {{edits.new}} before
> and after checkpoint fail and name-node does not upload new image file from
> the secondary node and does not truncate edits files.
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