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https://issues.apache.org/jira/browse/SOLR-656?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13541556#comment-13541556
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Shawn Heisey commented on SOLR-656:
-----------------------------------
What do you think about the "isFSBased()" idea in the patch on
DirectoryFactory? I know that nothing included in Solr/Lucene would have use
for it now, but in the future a Directory might be created that uses persistent
but not-filesystem-based storage (Hadoop, MongoDB, Swift, etc.). That probably
needs its own issue - just asking whether I should go ahead and make one, and
whether a matching issue in Lucene might be a good idea.
> better error message when "data/index" is completely empty
> ----------------------------------------------------------
>
> Key: SOLR-656
> URL: https://issues.apache.org/jira/browse/SOLR-656
> Project: Solr
> Issue Type: Wish
> Reporter: Hoss Man
> Assignee: Hoss Man
> Fix For: 4.2, 5.0
>
> Attachments: SOLR-656.patch, SOLR-656-rmdir.patch,
> SOLR-656-rmdir.patch
>
>
> Solr's normal behavior is to create an "index" dire in the dataDir if one
> does not already exist, but if "index" does exist it is used as is, warts and
> all ... if the index is corrupt in some way, and Solr can't create an
> IndexWriter or IndexReader that error is propagated up to the user.
> I don't think this should change: Solr shouldn't attempt to do anything
> special if there is a low level problem with the index, but something that
> i've seen happen more then a few times is that people unwittingly "rm
> index/*" when they should "run -r index" and as a result Solr+Lucene gives
> them an error instead of just giving them an empty index
> when checking if an existing index dir exists, it would probably be worth
> while to add a little one line sanity test that it contains some files, and
> log a warning.
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