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https://issues.apache.org/jira/browse/ACCUMULO-2061?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13913736#comment-13913736
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Josh Elser commented on ACCUMULO-2061:
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[~ctubbsii] that's precisely my concern as well.
In talking to [~kturner], I realized that despite the desire to deprecate the
two {{Property}}s, we're stuck keeping {{instance.dfs.dir}} around because,
until we can be absolutely *positive* that there are no relative paths
anywhere, we have to know what the "default" path for a {{FileSystem}} is. It
doesn't make sense to introduce an extra {{Property}} just to do this, so we're
stuck using something internally that we really want to avoid.
To be clear on the self-assignment of this issue, I've started working through
some of this, primarily to avoid {{instance.volumes}} using
{{instance.dfs.dir}} when determining where to write in a {{FileSystem}}
(instead using the fully configured Path). I'll be offline for most of the next
week, but I'll try to push up what I have done tonight and will pick it back up
then.
> Deprecate instance.dfs.uri and instance.dfs.dir
> -----------------------------------------------
>
> Key: ACCUMULO-2061
> URL: https://issues.apache.org/jira/browse/ACCUMULO-2061
> Project: Accumulo
> Issue Type: Sub-task
> Components: master, tserver
> Reporter: Christopher Tubbs
> Assignee: Josh Elser
> Priority: Critical
> Fix For: 1.6.0
>
>
> {{instance.dfs.uri}} and {{instance.dfs.dir}} are no longer needed with the
> {{instance.volumes}} property.
> Together, these two fields are needed for upgrades from relative paths, but
> full URIs for volumes should be specified in the {{instance.volumes}} set.
> Instead of appending {{instance.dfs.dir}} to every volume, which is a bit
> confusing, they should be specified explicitly in the {{instance.volumes}}.
> Example:
> {code}
> <property>
> <name>instance.volumes</name>
> <value>hdfs://nn1/accumulo</value>
> </property>
> {code}
> should be equivalent to
> {code}
> <property>
> <name>instance.dfs.uri</name>
> <value>hdfs://nn1</value>
> </property>
> <property>
> <name>instance.dfs.dir</name>
> <value>/accumulo</value>
> </property>
> {code}
> This change simplifies the semantics of configuring volumes for Accumulo to
> use for storage, and is a bit more obvious that we're logically configuring
> filesystem volumes, not "namenode URIs".
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