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https://issues.apache.org/jira/browse/HDFS-8480?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14587427#comment-14587427
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Zhe Zhang commented on HDFS-8480:
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Thanks for the comments Vinod and Arpit.
I tried the patch again and got the same failure. To verify that the failure is
caused by edit log version I changed the following line and removed the {{-1}}:
{code}
out.create(NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION - 1); ->
out.create(NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
{code}
And then the test passes. I think this expected when
{{EditLogFileInputStream#init()}} is called with {{verifyLayoutVersion}} as
true.
> Fix performance and timeout issues in HDFS-7929: use hard-links instead of
> copying edit logs
> --------------------------------------------------------------------------------------------
>
> Key: HDFS-8480
> URL: https://issues.apache.org/jira/browse/HDFS-8480
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.7.0
> Reporter: Zhe Zhang
> Assignee: Zhe Zhang
> Priority: Critical
> Attachments: HDFS-8480.00.patch, HDFS-8480.01.patch
>
>
> HDFS-7929 copies existing edit logs to the storage directory of the upgraded
> {{NameNode}}. This slows down the upgrade process. This JIRA aims to use
> hard-linking instead of per-op copying to achieve the same goal.
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