Eureka server is itself a eureka client when discovering eureka peers (it gets DiscoverClient from DiscoveryManager). Make sure DiscoveryManager is initialzed regardless of if the client or server config is invoked first.

fixes gh-18

spring-cloud-netflix-core/src/main/java/org/springframework/cloud/netflix/eureka/DiscoveryManagerIntitializer.java

@@ -0,0 +1,23 @@
+package org.springframework.cloud.netflix.eureka;
+
+import com.netflix.discovery.DiscoveryManager;
+import org.springframework.beans.factory.annotation.Autowired;
+
+/**
+ * @author Spencer Gibb
+ */
+public class DiscoveryManagerIntitializer {
+
+    @Autowired
+    private EurekaClientConfigBean clientConfig;
+
+    @Autowired
+    private EurekaInstanceConfigBean instanceConfig;
+
+
+    public synchronized void init() {
+        if (DiscoveryManager.getInstance().getDiscoveryClient() == null) {
+            DiscoveryManager.getInstance().initComponent(instanceConfig, clientConfig);
+        }
+    }
+}

spring-cloud-netflix-core/src/main/java/org/springframework/cloud/netflix/eureka/EurekaClientConfiguration.java

@@ -79,7 +79,7 @@ public class EurekaClientConfiguration implements SmartLifecycle, Ordered {
 	public void start() {
 		if (port != 0) {
 			instanceConfig.setNonSecurePort(port);
-			DiscoveryManager.getInstance().initComponent(instanceConfig, clientConfig);
+            discoveryManagerIntitializer().init();
 			logger.info("Registering application {} with eureka with status UP",
 					instanceConfig.getAppname());
 			ApplicationInfoManager.getInstance().setInstanceStatus(InstanceStatus.UP);
@@ -119,6 +119,12 @@ public class EurekaClientConfiguration implements SmartLifecycle, Ordered {
 		return order;
 	}
 
+    @Bean
+    @ConditionalOnMissingBean(DiscoveryManagerIntitializer.class)
+    public DiscoveryManagerIntitializer discoveryManagerIntitializer() {
+        return new DiscoveryManagerIntitializer();
+    }
+
 	@Bean
 	@Lazy
 	@Scope(proxyMode = ScopedProxyMode.TARGET_CLASS)

spring-cloud-netflix-eureka-server/src/main/java/org/springframework/cloud/netflix/eureka/server/EurekaServerInitializerConfiguration.java

@@ -28,7 +28,9 @@ import org.apache.commons.logging.LogFactory;
 import org.springframework.aop.framework.ProxyFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.cloud.netflix.eureka.DiscoveryManagerIntitializer;
 import org.springframework.cloud.netflix.eureka.EurekaServerConfigBean;
 import org.springframework.cloud.netflix.eureka.advice.PiggybackMethodInterceptor;
 import org.springframework.cloud.netflix.eureka.event.EurekaRegistryAvailableEvent;
@@ -79,9 +81,16 @@ public class EurekaServerInitializerConfiguration implements ServletContextAware
 		this.servletContext = servletContext;
 	}
 
+    @Bean
+    @ConditionalOnMissingBean(DiscoveryManagerIntitializer.class)
+    public DiscoveryManagerIntitializer discoveryManagerIntitializer() {
+        return new DiscoveryManagerIntitializer();
+    }
+
 	@Override
 	public void start() {
-		new Thread(new Runnable() {
+        discoveryManagerIntitializer().init();
+        new Thread(new Runnable() {
 			@Override
 			public void run() {
 				try {