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From "Michael Marth (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (OAK-1769) Better cooperation for conflicting updates across cluster nodes
Date Thu, 26 Mar 2015 20:51:53 GMT

     [ https://issues.apache.org/jira/browse/OAK-1769?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael Marth updated OAK-1769:
-------------------------------
    Fix Version/s:     (was: 1.4)
                   1.3.1

> Better cooperation for conflicting updates across cluster nodes
> ---------------------------------------------------------------
>
>                 Key: OAK-1769
>                 URL: https://issues.apache.org/jira/browse/OAK-1769
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: core, mongomk
>            Reporter: Marcel Reutegger
>            Assignee: Marcel Reutegger
>             Fix For: 1.3.1
>
>
> Every now and then we see commit failures in a cluster when many sessions try to update
the same property or perform some other conflicting update.
> The current implementation will retry the merge after a delay, but chances are some session
on another cluster node again changed the property in the meantime. This will lead to yet
another retry until the limit is reached and the commit fails. The conflict logic is quite
unfair, because it favors the winning session.
> The implementation should be improved to show a more fair behavior across cluster nodes
when there are conflicts caused by competing session.



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