Re: Restarting Tomcat container and Rebalancing

[dkarachentsev]

Hi,

You can get to know if rebalancing is started/finished only via events and
how you'll use this information is up to you :)

Thanks!



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Re: Restarting Tomcat container and Rebalancing

[styriver]

Hi So what I have implemented are two counters. One counter tracks the
rebalance start event and one counter tracks the rebalance stop events. I
start the stop counter after the first rebalance start event. On shutdown I
compare the counters when they are equal I am assuming rebalance is complete
and I complete shutdown. This appears to be working with my load tests. Is
this the best solution? Or is their a more straightforward way to know that
the rebalance has completed between the two server nodes?




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Re: Restarting Tomcat container and Rebalancing

[Dmitriy Karachentsev]

Hi.

You can use events to listen for rebalance completeness:

ignite.events().localListen(new IgnitePredicate() {
@Override public boolean apply(Event evt) {
CacheRebalancingEvent evt = (CacheRebalancingEvent)e;

// do some useful stuff

return true;
}
}, EventType.EVT_CACHE_REBALANCE_STOPPED);

On Thu, Nov 17, 2016 at 8:03 AM, styriver  wrote:

> We are running ignite inside a tomcat container. We have two tomcat
> instances
> on two different servers each tomcat instance is a server node. In our
> corporate turnover workflow we stop and restart each tomcat instance in
> sequence. Example:
> Deploy new war
> restart tomcat instance on server A (ignite server node)
> Deploy new war
> restart tomcat instance on server B (ignite server node)
>
> There is no manual step this sequence is all automated. What I am seeing is
> on node shutdown and restart we lose cache entries. I am assuming this is
> happening because a cache rebalance is taking place and because this is
> automated we are not allowing any time for the rebalance to finish. So
>
> Server A restarts and starts to rebalance it's cache from Server B. But
> before the rebalance finishes we have moved onto restarting Server B.
>
> This is how I am shutting down currently:
> Ignition.stop(ignite.name(), false);
>
> Is there anything I can do to ensure that before Server B restarts the
> rebalance is complete?
>
>
>
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> and-Rebalancing-tp9033.html
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>