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From "Robert Newson (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (COUCHDB-1797) Query against a view creates a questionable result
Date Sun, 19 May 2013 09:51:16 GMT

     [ https://issues.apache.org/jira/browse/COUCHDB-1797?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Newson resolved COUCHDB-1797.
------------------------------------

    Resolution: Invalid

include_docs=true fetches the documents after the view result has been calculated and thus
has a known race condition if the document is deleted in between. To avoid this, you need
to emit the document into the view itself, or compensate as you have done by retrying.

I also note that include_end is not a recognized parameter in the view api, you might be thinking
of inclusive_end (see http://wiki.apache.org/couchdb/HTTP_view_API#Querying_Options)

Please reopen if the changes you were making to the documents would not cause them to disappear
from the view.
                
> Query against a view creates a questionable result
> --------------------------------------------------
>
>                 Key: COUCHDB-1797
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-1797
>             Project: CouchDB
>          Issue Type: Bug
>          Components: Database Core
>    Affects Versions: 1.3
>            Reporter: Marten Feldtmann
>
> I have a test system (CouchDB 1.3.0 under windows 7/64 Bit), where I insert lots of documents(100000)
to get a regular flow of new incoming documents.
> The database has also some views (25). Another task is reading documents from a view,
change some attributes and then the document should disappear from the view (and appear in
another view). Something like a state machine.
> I do the following query against a view:
> http://localhost:5984/test5/_design/ticketorggraphics/_view/waiting?limit=5&include_docs=true&include_end=true
> and get the following string:
> {"total_rows":9224,"offset":0,"rows":[
> {"id":"92224c2862ef49c15f3d51e3e7283cde","key":"ni13_1_2013101_20130518155518065","value":"ni13_2013101_VsPercentResult_83519204509647","doc":{"_id":"92224c2862ef49c15f3d51e3e7283cde","_rev":"1-6e8b57744c2b88f3d2dcad602e2e3353","distribution":"global","type":"ESTicketCreateOriginalGraphic","createdTS":"20130518155518065","priority":1,"eDayID":"ni13","electionID":2013101,"layout":"ard2013","baseDocKey":"ni13_2013101_VsPercentResult_83519204509647","_attachments":{"bclitemsdata":{"content_type":"application/zip","revpos":1,"digest":"md5-sdff2jkxp4w6xsSlx5Yzxw==","length":4533,"stub":true}}}},
> {"id":"92224c2862ef49c15f3d51e3e7285d38","key":"ni13_1_2013101_20130518155518135","value":"ni13_2013101_VsPercentResult_16771681663808","doc":{"_id":"92224c2862ef49c15f3d51e3e7285d38","_rev":"1-05b92282ec5f2d1b6d56912760792702","distribution":"global","type":"ESTicketCreateOriginalGraphic","createdTS":"20130518155518135","priority":1,"eDayID":"ni13","electionID":2013101,"layout":"ard2013","baseDocKey":"ni13_2013101_VsPercentResult_16771681663808","_attachments":{"bclitemsdata":{"content_type":"application/zip","revpos":1,"digest":"md5-sdff2jkxp4w6xsSlx5Yzxw==","length":4533,"stub":true}}}},
> {"id":"92224c2862ef49c15f3d51e3e728c5e2","key":"ni13_1_2013101_20130518155518413","value":"ni13_2013101_VsPercentResult_10619936276742","doc":null},
> {"id":"b02d128d88188d78ef7f3478586c349b","key":"ni13_2_2013101_20130518155203924","value":"ni13_2013101_VsPercentResult_46202583943140","doc":{"_id":"b02d128d88188d78ef7f3478586c349b","_rev":"1-bd2a2bfb1f7461e6b3ec6d4d106e08e4","distribution":"global","type":"ESTicketCreateOriginalGraphic","createdTS":"20130518155203924","priority":2,"eDayID":"ni13","electionID":2013101,"layout":"ard2013","baseDocKey":"ni13_2013101_VsPercentResult_46202583943140","_attachments":{"bclitemsdata":{"content_type":"application/zip","revpos":1,"digest":"md5-ErSTxuEaSHZrIJ276ANdOQ==","length":4533,"stub":true}}}},
> {"id":"b02d128d88188d78ef7f3478586c72a1","key":"ni13_2_2013101_20130518155204124","value":"ni13_2013101_VsPercentResult_91455901404013","doc":{"_id":"b02d128d88188d78ef7f3478586c72a1","_rev":"1-6f702cff1d12f992d745fc19be84b846","distribution":"global","type":"ESTicketCreateOriginalGraphic","createdTS":"20130518155204124","priority":2,"eDayID":"ni13","electionID":2013101,"layout":"ard2013","baseDocKey":"ni13_2013101_VsPercentResult_91455901404013","_attachments":{"bclitemsdata":{"content_type":"application/zip","revpos":1,"digest":"md5-L9UXpNNRUyk/LSlzAyEsXQ==","length":4533,"stub":true}}}}
> ]}
> Please notice, that the doc attribute of the third item in the rows attribute has the
value "null". That means, that the view entry has no belonging document ????????
> This seems to indicate an inconsistency within the database.
> I can not say, when this error happens, but I know, that it will happen in my test run.

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