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https://issues.apache.org/jira/browse/HDFS-1881?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tanping Wang updated HDFS-1881:
-------------------------------
Attachment: HDFS-1881.patch
The problem was that when doing upgrade for BlockPoolSliceStorage we were hard
linking between incorrect directories.
> After taking snapshot (upgrade) on Federation, the current directory of data
> node is emtpy.
> --------------------------------------------------------------------------------------------
>
> Key: HDFS-1881
> URL: https://issues.apache.org/jira/browse/HDFS-1881
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Tanping Wang
> Assignee: Tanping Wang
> Attachments: HDFS-1881.patch
>
>
> After taking a snapshot in Federation (by starting up namenode with option
> -upgrade), it appears that the current directory of data node does not
> contain the block files. We have also verified that upgrading from 20 to
> Federation does not have this problem.
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