[jira] [Updated] (OAK-1810) Incorrect TarMK graph metadata validation

["Jukka Zitting (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/OAK-1810?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jukka Zitting updated OAK-1810:
-------------------------------

    Affects Version/s: 1.0

> Incorrect TarMK graph metadata validation
> -----------------------------------------
>
>                 Key: OAK-1810
>                 URL: https://issues.apache.org/jira/browse/OAK-1810
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>          Components: segmentmk
>    Affects Versions: 1.0
>            Reporter: Jukka Zitting
>            Assignee: Jukka Zitting
>            Priority: Minor
>             Fix For: 1.1
>
>
> When reading the pre-compiled graph entries from OAK-1780, the TarMK uses a few sanity checks to verify that the graph hasn't been corrupted and that using it for the cleanup operation is safe.
> It turns out that one of these sanity checks ({{bytes >= count * 24 + 16}}) is overly strict, as the minimum size limit for the graph entry is instead {{count * 16 + 16}}. The "24" factor applies only when sanity of the the tar index entry.
> The effect of this bug is not very critical, as a graph entry that fails the check will just be ignored with a warning and the cleanup code will fall back to the slower algorithm of instead reading the segment graph directly from the stored data segments.



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