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From Christopher Schultz <ch...@christopherschultz.net>
Subject Re: rolling deployments with tomcat clustering
Date Tue, 05 Feb 2013 22:48:13 GMT
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Pid,

On 2/5/13 3:17 AM, Pid wrote:
> On 05/02/2013 02:25, Zippy Zeppoli wrote:
>> Hello, I have a tomcat 7 cluster which I want to do rolling
>> deployments. I am using FarmDeployer. I am wondering, what is the
>> default behavior of FarmDeployer, does it undeploy and deploy the
>> new app all at once?
>> 
>> Is there any way to modify this behavior to do it serially?
> 
> Try versioning your war files.
> 
> myapp##v1.0.0.war myapp##v1.0.1.war
> 
> This feature is called 'parallel deployment'.
> 
> You can use JMX to monitor the activeCount of sessions of the
> older version and also to undeploy it when that number reaches
> zero.

Note that any JMX monitoring you are doing will likely have to change
due to the new "name" of the context.

- -chris
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