in src/main/java/org/apache/sling/discovery/impl/DiscoveryServiceImpl.java [172:179]
public void handleTopologyEvent(TopologyEvent event) {
HeartbeatHandler handler = heartbeatHandler;
if (activated && handler != null
&& (event.getType() == Type.TOPOLOGY_CHANGED || event.getType() == Type.PROPERTIES_CHANGED)) {
logger.info("changePropagationListener.handleTopologyEvent: topology changed - propagate through connectors");
handler.triggerAsyncConnectorPing();
}
}