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From "Damien Katz (JIRA)" <>
Subject [jira] Commented: (COUCHDB-763) duplicate and or missing revisions in changes feed
Date Mon, 17 May 2010 23:54:45 GMT


Damien Katz commented on COUCHDB-763:

This looks to be the same issue to what Simon Eisenmann encountered. I believe the problem
was 2 databases servers running at the same time for a short time during an internal auto-restart.
This problem has been fixed in trunk.

> duplicate and or missing revisions in changes feed
> --------------------------------------------------
>                 Key: COUCHDB-763
>                 URL:
>             Project: CouchDB
>          Issue Type: Bug
>          Components: Database Core
>    Affects Versions: 0.10.1
>            Reporter: Randall Leeds
>            Priority: Critical
> I have no idea if this is unique to 0.10.1 or if it shows up on 0.11/trunk since I have
no clue how to repro.
> If we can identify why this happens we should work to be very sure it's fixed.
> I see something like the following in my changes feed (taken from consecutive lines of
an actually changes feed):
> {"seq":36527,"id":"anonymized_docid","changes":[{"rev":"2186-967dbcd9d960b77955fcf6048fb219cc"}]},
> {"seq":36530,"id":"anonymized_docid","changes":[{"rev":"2188-ae8481b29fd3a42d5190aba7c13a522b"}]},
> I was under the impression that _changes only showed the newest revision for any document.
> Furthermore, the first of these two is actually missing. Querying the document with ?revs_info=true
shows it as such and this is confirmed by trying to query for ?rev=2186-967dbcd9d960b77955fcf6048fb219cc
> 1) Missing revisions should never show up in changes
> 2) Changes shouldn't list a document twice
> 3) This makes replication impossible since the reader tries to open missing revisions.
> Mostly for number (3) I'm marking this as critical.

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