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From "Adam Kocoloski (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (COUCHDB-1769) Duplicates in View indexes
Date Tue, 28 May 2013 19:20:20 GMT

    [ https://issues.apache.org/jira/browse/COUCHDB-1769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13668578#comment-13668578
] 

Adam Kocoloski commented on COUCHDB-1769:
-----------------------------------------

Thanks! The lack of emits is not necessarily significant; the dupes are detected one level
up, as it were, and we record information about each doc at that level regardless of the number
of emits.

On the other hand the results from _all_docs and _changes are interesting.  In the past I'm
fairly certain that we'd *always* observe dupes in at least one of those indexes.
                
> Duplicates in View indexes
> --------------------------
>
>                 Key: COUCHDB-1769
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-1769
>             Project: CouchDB
>          Issue Type: Bug
>          Components: JavaScript View Server
>    Affects Versions: 1.3
>            Reporter: Stefan Kögl
>         Attachments: duplicate.log
>
>
> The compaction of a view (created with CouchDB 1.3) failed due to view_duplicate_id.
The database to which the view belongs was created with 1.2.x but compacted (with the 0-byte-compact-file
trick) with 1.3.
> A full log of the failed compaction can be found at
> https://friendpaste.com/1AL050bzwyLCa9KJUKJw1u
> I experienced the same behaviour already with previous versions but assumed it might
be gone with 1.3, but this seems not to be the case. 
> When such duplicates happen (and appear during compaction), they seem to be at the beginning
of the view index. The view in question has the following _info:
> {noformat}
> {"name":"listeners","view_index":{"signature":"854a8065b438b3e53fcdbbe0a79a8e80","language":"javascript","disk_size":2679632207,"data_size":1026614011,"update_seq":58353111,"purge_seq":0,"updater_running":false,"compact_running":false,"waiting_commit":false,"waiting_clients":0}}
> {noformat}
> Compaction stopped with a 39M large .compact.view file.
> Also the problem seems to happen only one some machines.

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