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https://issues.apache.org/jira/browse/SOLR-5693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13890976#comment-13890976
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Mark Miller commented on SOLR-5693:
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Symptom is that sometimes searches will fail with file not found exceptions.
Depending on the velocity of the index, this will likely be intermittent.
> Running on HDFS does work correctly with NRT search.
> ----------------------------------------------------
>
> Key: SOLR-5693
> URL: https://issues.apache.org/jira/browse/SOLR-5693
> Project: Solr
> Issue Type: Bug
> Reporter: Mark Miller
> Assignee: Mark Miller
> Fix For: 5.0, 4.7
>
>
> Like NFS, HDFS has different file delete semantics than Windows and Unix. For
> non NRT cases, you can work around this by reserving commit points, but NRT
> counts on delete on last close semantics (unix), or delete fails, try again
> later (windows). This is because files can be merged away before they even
> become part of a commit point. Meanwhile, real time readers can reference
> those files.
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