How to override the ribbon.serverListRefreshInterval default value in Spring Cloud Ribbon?

Question

I wrote a simple Spring Cloud Ribbon application, to call a REST service which was registered in Eureka.

But how to override the ribbon.serverListRefreshInterv

Answer 1

Try with:

myService.ribbon.ServerListRefreshInterval=10000

where myService is the name of your destination microservice.

UPDATE:

After some source code digging I found out that LoadBalancerBuilder calls:

@Deprecated
public ZoneAwareLoadBalancer(IClientConfig clientConfig, IRule rule,
        IPing ping, ServerList serverList, ServerListFilter filter) {
    super(clientConfig, rule, ping, serverList, filter);
}

whose super is:

@Deprecated
public DynamicServerListLoadBalancer(IClientConfig clientConfig, IRule rule, IPing ping, 
        ServerList serverList, ServerListFilter filter) {
    this(
            clientConfig,
            rule,
            ping,
            serverList,
            filter,
            new PollingServerListUpdater()
    );
} 

Notice the PollingServerListUpdater constructors:

private static int LISTOFSERVERS_CACHE_REPEAT_INTERVAL = 30 * 1000; // msecs;

public PollingServerListUpdater() {
    this(LISTOFSERVERS_CACHE_UPDATE_DELAY, LISTOFSERVERS_CACHE_REPEAT_INTERVAL);
}

public PollingServerListUpdater(IClientConfig clientConfig) {
    this(LISTOFSERVERS_CACHE_UPDATE_DELAY, getRefreshIntervalMs(clientConfig));
}

The second one would allow us to override the default refresh interval. However it's the first one that's called, so it ignores de property.

UPDATE 2:

There's an open issue about this: https://github.com/spring-cloud/spring-cloud-netflix/issues/1304