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Date: Wed, 18 May 2011 03:09:47 +0000 (UTC)
From: "Adam Kocoloski (JIRA)" <jira@apache.org>
To: dev@couchdb.apache.org
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Subject: [jira] [Commented] (COUCHDB-1163) Document returned by id, but
 cannot be found by rev
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    [ https://issues.apache.org/jira/browse/COUCHDB-1163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13035182#comment-13035182 ] 

Adam Kocoloski commented on COUCHDB-1163:
-----------------------------------------

Paul also pointed out that in this edge case couch_key_tree will need to deviate from its usual logic of always preferring the existing value over the one in the inserted path.  I think we agree that the key_tree merge function should allow the user to supply a function to merge values for a given key.  The default merge function would prefer summary tuples > in-memory document bodies > ?REV_MISSING markers.

> Document returned by id, but cannot be found by rev
> ---------------------------------------------------
>
>                 Key: COUCHDB-1163
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-1163
>             Project: CouchDB
>          Issue Type: Bug
>          Components: Database Core
>    Affects Versions: 1.0.1, 1.0.2
>            Reporter: James Howe
>            Priority: Blocker
>             Fix For: 1.0.3, 1.1
>
>         Attachments: Couch logging for jira issue
>
>
> Somehow, our cluster has developed the following problem on a handful of documents. Will post reproduction steps if we find them. All properties have been redacted. All the documents this affects also have attachments, if that is significant. Once a document is in this situation, it causes conflict detection, replication and include_docs to behave incorrectly or outright fail.
> GET /database/4cdee83a118ea1cf3050b1d006144d46 returns
> {
>     "_id": "4cdee83a118ea1cf3050b1d006144d46",
>     "_rev": "10-df4bf65a6104ea240f100c30d3cb245d",
>     "foo": "bar"
> }
> GET /database/4cdee83a118ea1cf3050b1d006144d46?open_revs=all returns
> [
>     {
>         "ok": {
>             "_id": "4cdee83a118ea1cf3050b1d006144d46",
>             "_rev": "10-df4bf65a6104ea240f100c30d3cb245d",
>             "foo": "bar"
>         }
>     },
>     {
>         "ok": {
>             "_id": "4cdee83a118ea1cf3050b1d006144d46",
>             "_rev": "8-eea5e36daee12acd79a127abf36f7720",
>             _deleted: true
>         }
>     },
>     {
>         "ok": {
>             "_id": "4cdee83a118ea1cf3050b1d006144d46",
>             "_rev": "9-2cead1e4c813a4f0d10a9bc4aa28bfda",
>             _deleted: true
>         }
>     },
>     {
>         "ok": {
>             "_id": "4cdee83a118ea1cf3050b1d006144d46",
>             "_rev": "7-c3b44f004660caa496804409089b53d9",
>             _deleted: true
>         }
>     },
>     {
>         "ok": {
>             "_id": "4cdee83a118ea1cf3050b1d006144d46",
>             "_rev": "6-52e978041bb324d19e01a2ac5a243702",
>             _deleted: true
>         }
>     },
>     {
>         "ok": {
>             "_id": "4cdee83a118ea1cf3050b1d006144d46",
>             "_rev": "5-761bf28c6989f0fde41bdd5732c33159",
>             _deleted: true
>         }
>     },
>     {
>         "ok": {
>             "_id": "4cdee83a118ea1cf3050b1d006144d46",
>             "_rev": "4-abb005cf4b2d2dd12880a33af1e7066e",
>             _deleted: true
>         }
>     },
>     {
>         "ok": {
>             "_id": "4cdee83a118ea1cf3050b1d006144d46",
>             "_rev": "3-233e4624e620ec1c8b66f21a051832f8",
>             _deleted: true
>         }
>     },
>     {
>         "ok": {
>             "_id": "4cdee83a118ea1cf3050b1d006144d46",
>             "_rev": "10-55f0cdf9dd95ed230b733a2c826c842c",
>             _deleted: true
>         }
>     },
>     {
>         "ok": {
>             "_id": "4cdee83a118ea1cf3050b1d006144d46",
>             "_rev": "11-264c9d6c249ba2fc9b13df35cb447fd7",
>             _deleted: true
>         }
>     },
>     {
>         "ok": {
>             "_id": "4cdee83a118ea1cf3050b1d006144d46",
>             "_rev": "9-2cead1e4c813a4f0d10a9bc4aa28bfda",
>             _deleted: true
>         }
>     },
>     {
>         "ok": {
>             "_id": "4cdee83a118ea1cf3050b1d006144d46",
>             "_rev": "2-9f2df19059d9a460a12740a63a4d95e9",
>             _deleted: true
>         }
>     }
> ]
> GET /database/4cdee83a118ea1cf3050b1d006144d46?rev=10-df4bf65a6104ea240f100c30d3cb245d returns
> {
>     "error": "not_found",
>     "reason": "missing"
> }

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