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https://issues.apache.org/jira/browse/ACCUMULO-3006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14070544#comment-14070544
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Dave Marion commented on ACCUMULO-3006:
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In this case it is not entirely transparent to the application, see:
SimpleGarbageCollector.moveToTrash() and VolumeManagerImpl.moveToTrash().
The trash policy is set for the underlying HDFS instances, but there is no
mapping in the viewfs definition for /user. If there was a viewfs definition
for /user, it would fail anyway in the case where you are trying to put a file
from one nameservice into the trash directory that is mounted from a different
nameservice (this would equate to a file move across nameservices).
> 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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