Re: [jgroups-dev] Question on FD

On 3/12/12 11:00 PM, Sundararajan, Mukund wrote:
> Hi Bela,
>
>   Are properties of the FD protocol (timeout and max_retries) configurable programmatically at runtime? We are using version 2.12. We want to be able to start our cluster with a default timeout and then later on be able to configure the timeout and/or max_retries from an administrator UI. Can we apply the changes to a connected JChannel without requiring a restart of the channel?


Yes and no: you can change max_tries and timeout at runtime, but they 
won't have any effect on the Monitor and Braodcast tasks, which were 
already started with timeout interval. You'd have to restart them 
programmatically as well, using stopFailureDetection() / 
startFailureDetection().

Example:

JChannel ch;
FD fd=(FD)ch.getProtocolStack().findProtocol(FD.class);
fd.setMaxTries(...);
fd.setTimeout(...);
fd.stopFailureDetection();
fd.startFailureDetection();

-- 
Bela Ban, JGroups lead (http://www.jgroups.org)

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