Re: accessing HDFS Snapshot using HDFS NFS Gateway

[Mukul Kumar Singh]

Hi Markus,

HDFS NFS gateway currently does not support snapshots. Following issues 
are tracking this in HDFS.

https://issues.apache.org/jira/browse/HDFS-5084

https://issues.apache.org/jira/browse/HDFS-11315

However we do not have a fix for these jira.

Thanks,

Mukul

On 5/9/19 1:16 AM, markus.gier...@fiduciagad.de wrote:

Hi!

I have mounted the HDFS root path over the HDFS NFS Gateway and I'm 
able to do all kind of file operations. Now I want to read a from a 
HDFS snapshot using the NFS mount,


snapshot in hdfs works and I can see it using hdfs dfs -ls

    hdfs dfs -ls /data/standard/.snapshot/s20190507-063223.621

    Found 2 items

    So when I try a ls command on the nfs mount I get an error.

    ll /mnt/hdfs/data/standard/.snapshot/s20190507-063223.621

    ls: cannot access
    /mnt/hdfs/data/standard/.snapshot/s20190507-063223.621:
    Input/output error​

    I'm using HDP 3.1.0

    Any ideas ?

    Best Regards

    MARKUS


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