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From Michael Dürig (JIRA) <j...@apache.org>
Subject [jira] [Commented] (OAK-7234) Check for outdated journal at startup
Date Tue, 04 Dec 2018 15:08:00 GMT

    [ https://issues.apache.org/jira/browse/OAK-7234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16708831#comment-16708831
] 

Michael Dürig commented on OAK-7234:
------------------------------------

[~frm], now that OAK-7866 is resolved, would it make sense to take this one up again? 

> Check for outdated journal at startup
> -------------------------------------
>
>                 Key: OAK-7234
>                 URL: https://issues.apache.org/jira/browse/OAK-7234
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: segment-tar
>            Reporter: Michael Dürig
>            Assignee: Michael Dürig
>            Priority: Minor
>              Labels: resilience, tooling
>             Fix For: 1.10
>
>
> To prevent accidentally branching the repository when the {{journal.log}} became outdated
(e.g. OAK-3702) we could add an additional safety feature which would prevent the repository
from starting in such cases. There's a couple of concerns to address:
>  * What kind of tooling / guidance do we need to provide to recover should such a situation
be detected?
>  * How do we detect the {{journal.log}} being outdated?
>  * How do we prevent false positives?
>  * How do we deal with situation where the {{journal.log}} modifications are intended
(e.g. by tools, of manual interventions)?
>  



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