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Date: Mon, 29 Aug 2011 06:53:44 +0000 (UTC)
From: "Paul Joseph Davis (JIRA)" <jira@apache.org>
To: dev@couchdb.apache.org
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Subject: [jira] [Updated] (COUCHDB-1265) Replication can introduce
 duplicates into the seq_btree.
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     [ https://issues.apache.org/jira/browse/COUCHDB-1265?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Paul Joseph Davis updated COUCHDB-1265:
---------------------------------------

    Attachment: replication-frenzy.py

For the curious, this is the original script I wrote that triggered the bug. It requires that you setup three couchdb servers on ports 5984, 5985, and 5986.

Basic idea is that it just sets up continuous replication in both directions between all pairs of nodes. Then it just hammers one node updating the same document over and over again.

Fairly shortly you can start seeing duplicates in the _changes feed.

> Replication can introduce duplicates into the seq_btree.
> --------------------------------------------------------
>
>                 Key: COUCHDB-1265
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-1265
>             Project: CouchDB
>          Issue Type: Bug
>          Components: Database Core
>            Reporter: Paul Joseph Davis
>            Assignee: Paul Joseph Davis
>         Attachments: COUCHDB-1265.patch, replication-frenzy.py
>
>
> Full description, test, and patch to follow shortly.

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