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https://issues.apache.org/jira/browse/HDFS-5977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13906261#comment-13906261
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Andrew Wang commented on HDFS-5977:
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Hi Haohui, I had the same thought and agree in spirit, but if you look at the
comment history on HDFS-5709, [~sureshms] had some concerns about adding more
reserved paths beyond our current two. We agreed to implement a more general
solution for this reason.
I agree that we don't need to implement this for the PB loader until we add
another reserved path, but I filed this JIRA so "-renameReserved" isn't
forgotten about in the future.
> FSImageFormatPBINode does not respect "-renameReserved" upgrade flag
> --------------------------------------------------------------------
>
> Key: HDFS-5977
> URL: https://issues.apache.org/jira/browse/HDFS-5977
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 2.4.0
> Reporter: Andrew Wang
> Labels: protobuf
>
> HDFS-5709 added a new upgrade flag "-renameReserved" which can be used to
> automatically rename reserved paths like "/.reserved" encountered during
> upgrade. The new protobuf loading code does not have a similar facility, so
> future reserved paths cannot be automatically renamed via "-renameReserved".
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