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From "Sebastian Cohnen (JIRA)" <j...@apache.org>
Subject [jira] Updated: (COUCHDB-968) Duplicated IDs in _all_docs
Date Fri, 26 Nov 2010 11:04:14 GMT

     [ https://issues.apache.org/jira/browse/COUCHDB-968?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sebastian Cohnen updated COUCHDB-968:
-------------------------------------

    Affects Version/s: 1.0

> Duplicated IDs in _all_docs
> ---------------------------
>
>                 Key: COUCHDB-968
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-968
>             Project: CouchDB
>          Issue Type: Bug
>          Components: Database Core
>    Affects Versions: 1.0, 1.0.1, 1.0.2
>         Environment: Ubuntu 10.04.
>            Reporter: Sebastian Cohnen
>
> We have a database, which is causing serious trouble with compaction and replication
(huge memory and cpu usage, often causing couchdb to crash b/c all system memory is exhausted).
Yesterday we discovered that db/_all_docs is reporting duplicated IDs (see [1]). Until a few
minutes ago we thought that there are only few duplicates but today I took a closer look and
I found 10 IDs which sum up to a total of 922 duplicates. Some of them have only 1 duplicate,
others have hundreds.
> Some facts about the database in question:
> * ~13k documents, with 3-5k revs each
> * compaction is run on a daily bases
> * several thousands updates per hour
> * multi-master setup with pull replication from each other
> Unfortunately the database's contents are confidential and I'm not allowed to publish
it.
> [1]: Part of http://localhost:5984/DBNAME/_all_docs
> ...
> {"id":"9997","key":"9997","value":{"rev":"6096-603c68c1fa90ac3f56cf53771337ac9f"}},
> {"id":"9999","key":"9999","value":{"rev":"6097-3c873ccf6875ff3c4e2c6fa264c6a180"}},
> {"id":"9999","key":"9999","value":{"rev":"6097-3c873ccf6875ff3c4e2c6fa264c6a180"}},
> ...

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