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From "Marcel Reutegger (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (OAK-3554) Use write concern of w:majority when connected to a replica set
Date Wed, 11 Nov 2015 15:44:10 GMT

     [ https://issues.apache.org/jira/browse/OAK-3554?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Marcel Reutegger resolved OAK-3554.
       Resolution: Fixed
    Fix Version/s:     (was: 1.4)

> Use write concern of w:majority when connected to a replica set
> ---------------------------------------------------------------
>                 Key: OAK-3554
>                 URL: https://issues.apache.org/jira/browse/OAK-3554
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: core, mongomk
>            Reporter: Chetan Mehrotra
>            Assignee: Marcel Reutegger
>              Labels: resilience
>             Fix For: 1.3.11
> Currently while connecting to Mongo MongoDocumentStore relies on default write concern
provided as part of mongouri. 
> Recently some issues were seen where Mongo based Oak was connecting to 3 member replica
set and there were frequent replica state changes due to use of VM for Mongo. This caused
data loss and corruption of data in Oak.
> To avoid such situation Oak should default to write concern of majority by default. If
some write concern is specified as part of mongouri then that should take precedence. This
would allow system admin to take the call of tweaking write concern if required and at same
time allows Oak to use the safe write concern.

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