@Override
protected void startNodeRegistration(Injector injector) {
// Register this node.
final NodeService nodeService = injector.getInstance(NodeService.class);
final ServerStatus serverStatus = injector.getInstance(ServerStatus.class);
final ActivityWriter activityWriter = injector.getInstance(ActivityWriter.class);
nodeService.registerServer(
serverStatus.getNodeId().toString(),
configuration.isMaster(),
configuration.getRestTransportUri());
serverStatus.setLocalMode(isLocal());
if (configuration.isMaster() && !nodeService.isOnlyMaster(serverStatus.getNodeId())) {
LOG.warn(
"Detected another master in the cluster. Retrying in {} seconds to make sure it is not "
+ "an old stale instance.",
TimeUnit.MILLISECONDS.toSeconds(configuration.getStaleMasterTimeout()));
try {
Thread.sleep(configuration.getStaleMasterTimeout());
} catch (InterruptedException e) {
/* nope */
}
if (!nodeService.isOnlyMaster(serverStatus.getNodeId())) {
// All devils here.
String what =
"Detected other master node in the cluster! Starting as non-master! "
+ "This is a mis-configuration you should fix.";
LOG.warn(what);
activityWriter.write(new Activity(what, Server.class));
// Write a notification.
final NotificationService notificationService =
injector.getInstance(NotificationService.class);
Notification notification =
notificationService
.buildNow()
.addType(Notification.Type.MULTI_MASTER)
.addSeverity(Notification.Severity.URGENT);
notificationService.publishIfFirst(notification);
configuration.setIsMaster(false);
} else {
LOG.warn("Stale master has gone. Starting as master.");
}
}
}
@Inject
public NodeServiceImpl(final MongoConnection mongoConnection, final Configuration configuration) {
super(mongoConnection);
this.pingTimeout = TimeUnit.MILLISECONDS.toSeconds(configuration.getStaleMasterTimeout());
}