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From "Marcel Reutegger (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (OAK-3547) Improve ability of the OakDirectory to recover from unexpected file errors
Date Wed, 04 Nov 2015 12:53:27 GMT

    [ https://issues.apache.org/jira/browse/OAK-3547?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14989491#comment-14989491
] 

Marcel Reutegger commented on OAK-3547:
---------------------------------------

IIUC the lucene index will fall back to a previous version in case it faces an inconsistent
state. Is there also some coordination with the checkpoint associated with the previous known
good state of the lucene index?

> Improve ability of the OakDirectory to recover from unexpected file errors
> --------------------------------------------------------------------------
>
>                 Key: OAK-3547
>                 URL: https://issues.apache.org/jira/browse/OAK-3547
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: lucene
>    Affects Versions: 1.4
>            Reporter: Ian Boston
>
> Currently if the OakDirectory finds that a file is missing or in some way damaged, and
exception is thrown which impacts all queries using that index, at times making the index
unavailable. This improvement aims to make the OakDirectory recover to a previously ok state
by storing which files were involved in previous states, and giving the code some way of checking
if they are valid.



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