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https://issues.apache.org/jira/browse/ACCUMULO-3006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14070641#comment-14070641
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Dave Marion commented on ACCUMULO-3006:
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Documenting what I understand after my discussion with [~ctubbsii] and
[~kturner]. This may break down into the following tickets:
1. Accumulo should only use the filesystems referenced in the instance.volumes
property. With the deprecation of instance.dfs.uri and instance.dfs.dir this
property should become required and we should not fall back to Hadoop's
fs.defaultFS property value.
2. Accumulo should validate the configuration on init, init --add-volumes, and
start. The validation of other properties is out of scope of this issue, but if
instance.volumes is either a) not set, b) has no value, or c) resolves to some
unknown filesystem scheme, then init and init --add-volumes should fail
quickly. There should be a whitelist of known good filesystem schemes. If the
filesystem schemes in instance.volumes are not on the whitelist, then either
start should fail or we should log warnings loudly. If we fail on start due to
filesystem scheme not being on the whitelist, then we also need to provide a
way for users to ignore the whitelist check knowingly.
> Don't allow viewfs in instance.volumes
> --------------------------------------
>
> Key: ACCUMULO-3006
> URL: https://issues.apache.org/jira/browse/ACCUMULO-3006
> 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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