Íñigo Goiri updated HDFS-15112:
    Attachment: HDFS-15112.006.patch

> RBF: Do not return FileNotFoundException when a subcluster is unavailable 
> --------------------------------------------------------------------------
>                 Key: HDFS-15112
>                 URL: https://issues.apache.org/jira/browse/HDFS-15112
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Íñigo Goiri
>            Assignee: Íñigo Goiri
>            Priority: Major
>         Attachments: HDFS-15112.000.patch, HDFS-15112.001.patch, 
> HDFS-15112.002.patch, HDFS-15112.004.patch, HDFS-15112.005.patch, 
> HDFS-15112.006.patch, HDFS-15112.patch
> If we have a mount point using HASH_ALL across two subclusters and one of 
> them is down, we may return FileNotFoundException while the file is just in 
> the unavailable subcluster.
> We should not return FileNotFoundException but something that shows that the 
> subcluster is unavailable.

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