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https://issues.apache.org/jira/browse/HADOOP-9554?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13653131#comment-13653131
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Steve Loughran commented on HADOOP-9554:
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I certainly don't want any changes in the {{FileSystem}} interface in 1.x, and
doubt anyone else will, even the new method {{FileSystem.listFiles()}} has been
troublesome enough to both implement and test, and is not fully functional on
all filesystems.
# The addition of new abstract methods to {{FileSystem}} will be an
incompatible change in the 1.x line, break all third party filesystem
implementations and generally cause grief.
I'm -1 to this on 1.x for compatibility, and provisionally -0 on this on HDFS
v2. If people really do want this, then in accordance with HADOOP-9361, you
will have to "Strictly define the expected behavior of filesystem APIs and
write tests to verify compliance".
> Introduce a api to check if authorization is supported by the FS
> ----------------------------------------------------------------
>
> Key: HADOOP-9554
> URL: https://issues.apache.org/jira/browse/HADOOP-9554
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: samar
>
> Need a new api on the FileSystem like isAuthorizationSupoorted() which would
> help us to identify if we need to check for authorization. Hence, if
> isAuthorizationSupoorted() == true and then only would proceed with the
> ownership check. This is required because some FS like S3 does not support
> Authorization and returns owners as "" . Having this check will help us skip
> the owner check
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