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https://issues.apache.org/jira/browse/BOOKKEEPER-247?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13403946#comment-13403946
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Ivan Kelly commented on BOOKKEEPER-247:
---------------------------------------

The problem was quite simple in the end. The code that ensures I only checked 
the correct replicas, only worked if the number of entries in the ledger was 
greater than the number of bookies in the ensemble. Adding two checks fixed it. 
I also moved around the code a bit. I've pushed it to github and attached a new 
patch. I still need to add tests to this, so the patch shouldn't be considered 
ready for submission yet.
                
> Detection of under replication
> ------------------------------
>
>                 Key: BOOKKEEPER-247
>                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-247
>             Project: Bookkeeper
>          Issue Type: Sub-task
>          Components: bookkeeper-client, bookkeeper-server
>            Reporter: Ivan Kelly
>            Assignee: Ivan Kelly
>         Attachments: BOOKKEEPER-247.patch
>
>
> This JIRA discusses how the bookkeeper system will detect underreplication of 
> ledger entries.

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