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Posted to dev@lucene.apache.org by "Mark Miller (JIRA)" <ji...@apache.org> on 2014/02/04 19:30:10 UTC

[jira] [Commented] (SOLR-5693) Running on HDFS does work correctly with NRT search.

    [ https://issues.apache.org/jira/browse/SOLR-5693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13890976#comment-13890976 ] 

Mark Miller commented on SOLR-5693:
-----------------------------------

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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