Work on UIMA-5193 started by Lou DeGenaro.
> DUCC failover support (static)
> ------------------------------
>                 Key: UIMA-5193
>                 URL: https://issues.apache.org/jira/browse/UIMA-5193
>             Project: UIMA
>          Issue Type: Improvement
>          Components: DUCC
>            Reporter: Lou DeGenaro
>            Assignee: Lou DeGenaro
>             Fix For: 2.2.0-Ducc
> DUCC should provide the capability to move the head node, comprising the 
> broker, database, Orchestrator, PM, RM, SM, and WS, and have the agents 
> seamlessly switch over w/o service disruption.
> ---
> In this "static" failover implementation the agents are pre-configured with a 
> list of potential head nodes.  Introduced into the ducc.properties file is 
> the key ducc.head.failover whose value is a comma separated list of failover 
> nodes:
> ducc.head.failover = node1, node2, node3...
> The agents at boot time are configured for broker failover to this set of 
> nodes.
> If ducc.head.failover is not specified, then the failover functionality is 
> simply not supported for the installation (e.g. no seamless transition of 
> running agents to an alternate broker head node).
> If ducc.head.failover is specified, then the node specified for ducc.head 
> must appear in this list.

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