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https://issues.apache.org/jira/browse/COUCHDB-1769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13668549#comment-13668549
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Stefan Kögl commented on COUCHDB-1769:
--------------------------------------
I've investigated this a bit further. One of the design document for which
compaction keeps failing with duplicates has [6
views|https://github.com/gpodder/mygpo/tree/9c4ff38f6b432ed75264b8b86973043e2b4fbced/couchdb/general/_design/listeners/views].
I've ran the document {{05033b78521e97e9cfb06a4bce8c28f7}} through all of
their map functions and none of them did emit any value. I don't know if this
is relevant, though.
The smallest .view file with duplicates is 944M in size, and I could share it
with one of the developers if somebody is interested.
> 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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