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https://issues.apache.org/jira/browse/HADOOP-15094?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran updated HADOOP-15094:
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Affects Version/s: 2.7.4
Priority: Minor (was: Major)
Summary: FileSystem.getCanonicalUri() to be public (was:
FileSystem)
Component/s: fs
> FileSystem.getCanonicalUri() to be public
> -----------------------------------------
>
> Key: HADOOP-15094
> URL: https://issues.apache.org/jira/browse/HADOOP-15094
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs
> Affects Versions: 2.7.4
> Reporter: Steve Loughran
> Priority: Minor
>
> Discussion around SPARK-22587 highlights how per-fs notions of a canonical
> URI make it hard to determine if a file is on a specific filesystem, or, put
> differently, if two filesystems are equivalent.
> You can't reliably use this.getUri == that.getUri as it doesn't handle FQDN
> == unqualified DN, bit you can't do nslookup as HDFS HA doesn't use hosnames.
> If {{FileSystem.getCanonicalUri()}} were public, then this could be used to
> compare things consistently.
> needs: filesystem.md coverage; contract test (two filesystem instances are
> equal, different filesystems aren't). Or at least: this method never returns
> null.
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