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From "Christopher Tubbs (JIRA)" <>
Subject [jira] [Commented] (ACCUMULO-3006) Don't allow viewfs in instance.volumes
Date Tue, 22 Jul 2014 16:34:40 GMT


Christopher Tubbs commented on ACCUMULO-3006:

I'm not sure I agree that viewfs should be disallowed simply because it has certain preconditions
to function properly. Rather, it should be made clear in our documentation that the user is
responsible for establishing any necessary preconditions (like core-site.xml on the classpath),
and we can highlight the known issues (such as the problem when the trash is enabled and there
is no mapping). We can also take care to remove any recommendation to use viewfs, due to the
complexity of configuration.

So, I'd prefer this issue be changed to a documentation improvement to update the multivolume
chapter in the manual, given its limitations, rather than to disable the feature entirely.

Now, if there are any outstanding issues with the functionality of Accumulo and ViewFS that
does not represent satisfying a precondition in configuration, then separate issues should
be filed to fix those in a separate JIRA for resolution (if possible).

> Don't allow viewfs in instance.volumes
> --------------------------------------
>                 Key: ACCUMULO-3006
>                 URL:
>             Project: Accumulo
>          Issue Type: Bug
>    Affects Versions: 1.6.0
>            Reporter: Dave Marion
>            Priority: Blocker
>             Fix For: 1.6.1, 1.7.0
> I think one of our folks put viewfs into instance.volumes on accident. File references
in accumulo.root and accumulo.metadata were then written with viewfs in the path. The garbage
collector then throws errors as compactions occur and it tries delete and move the files to
the hdfs users trash directory.
> viewfs should never be allowed in instance.volumes property. It should fail.

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