[jboss-jira] [JBoss JIRA] Resolved: (JBAS-5660) HASingletonElectionPolicy suitable for mod_cluster

Tue Aug 5 12:50:56 EDT 2008

     [ https://jira.jboss.org/jira/browse/JBAS-5660?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Paul Ferraro resolved JBAS-5660.
--------------------------------

    Resolution: Done

HASingletonElectionPolicy no longer determines the list of candidates from which to elect a master - this is determined by the HA singleton object (e.g. ModClusterService).  The object ModClusterService places into the DRM contains the domain - along with other details.  The implementation of ModClusterService.getElectionCandidates() prunes nodes that do not match the current domain.

> HASingletonElectionPolicy suitable for mod_cluster
> --------------------------------------------------
>
>                 Key: JBAS-5660
>                 URL: https://jira.jboss.org/jira/browse/JBAS-5660
>             Project: JBoss Application Server
>          Issue Type: Sub-task
>      Security Level: Public(Everyone can see) 
>          Components: Clustering, Web (Tomcat) service
>            Reporter: Brian Stansberry
>            Assignee: Paul Ferraro
>             Fix For: JBossAS-5.1.0.CR1
>
>
> The determination of a singleton master for the mod_cluster intra-cluster comm component has a couple twists:
> 1) Possibility of one master per mod_cluster domain, rather than one per "cluster"
> 2) Nodes that are unable to communicate with the httpd side for some reason should not be eligible to servce as master.
> Need an HASingletonElectionPolicy impl that can handle these requirements.

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