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https://issues.apache.org/jira/browse/HADOOP-16277?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16826840#comment-16826840
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Steve Loughran commented on HADOOP-16277:
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I see what you are trying to do here: work out which token is needed for a
specific FS.
But:
* with KMS in the mix, and viewFS, a filesystem may have >1 token.
* with the S3A, WASB, AFBS and GS filesystems, the DT support is a plugin
point: you don't have a single hard coded token to look for, so that hard
coding you fall back to doesn't work.
What you really want is to collect all the DTs for a filesystem: but doesn't
asking an FS instance for that return the existing ones if they exist? I'd have
to look through all the existing FS implementations for that, but it seems like
they ought to
> Expose getTokenKind method in FileSystem
> ----------------------------------------
>
> Key: HADOOP-16277
> URL: https://issues.apache.org/jira/browse/HADOOP-16277
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Venkatesh Sridharan
> Priority: Trivial
>
> It would be nice to have a getTokenKind() method exposed in
> [FileSystem|[https://github.com/apache/hadoop-common/blob/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java]]
> . Currently WebHdfsFileSystem class has getTokenKind() which is protected.
> Having it in FileSystem makes it easier to use at runtime when the consumer
> doesn't know what the underlying FileSystem implementation is.
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