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https://issues.apache.org/jira/browse/COUCHDB-763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12868454#action_12868454
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Damien Katz commented on COUCHDB-763:
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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: https://issues.apache.org/jira/browse/COUCHDB-763
> 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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