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https://issues.apache.org/jira/browse/HDFS-6696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14064331#comment-14064331
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Andrew Wang commented on HDFS-6696:
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Hey [~kihwal], what Hadoop version were you starting with and upgrading to? I
did some tests upgrading from a 1.2.1 image to trunk which I think repros this,
but I'd like to verify that my WIP fix works for your situation.
> Name node cannot start if the path of a file under construction contains
> ".snapshot"
> ------------------------------------------------------------------------------------
>
> Key: HDFS-6696
> URL: https://issues.apache.org/jira/browse/HDFS-6696
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Kihwal Lee
> Assignee: Andrew Wang
> Priority: Blocker
>
> Using {{-renameReserved}} to rename ".snapshot" in a pre-hdfs-snapshot
> feature fsimage during upgrade only works, if there is nothing under
> construction under the renamed directory. I am not sure whether it takes
> care of edits containing ".snapshot" properly.
> The workaround is to identify these directories and rename, then do
> {{saveNamespace}} before performing upgrade.
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