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https://issues.apache.org/jira/browse/OAK-2498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15542013#comment-15542013
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Michael Dürig commented on OAK-2498:
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At http://svn.apache.org/viewvc?rev=1763140&view=rev I simplified the 
calculation of the exact segment size. This is now possible we don't have to 
track the space required by the roots any more.

> Root record references provide too little context for parsing a segment
> -----------------------------------------------------------------------
>
>                 Key: OAK-2498
>                 URL: https://issues.apache.org/jira/browse/OAK-2498
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>          Components: segment-tar
>            Reporter: Michael Dürig
>            Assignee: Francesco Mari
>              Labels: tools
>             Fix For: Segment Tar 0.0.14
>
>
> According to the [documentation | 
> http://jackrabbit.apache.org/oak/docs/nodestore/segmentmk.html] the root 
> record references in a segment header provide enough context for parsing all 
> records within this segment without any external information. 
> Turns out this is not true: if a root record reference turns e.g. to a list 
> record. The items in that list are record ids of unknown type. So even though 
> those records might live in the same segment, we can't parse them as we don't 
> know their type. 



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