Merge pull request #285 from nobodyiam/fix-client-rate-limiter-issue

use tryAcquire to avoid acquire compatibility issue

apollo-client/src/main/java/com/ctrip/framework/apollo/internals/RemoteConfigRepository.java

@@ -161,7 +161,7 @@ public class RemoteConfigRepository extends AbstractConfigRepository {
   }
 
   private ApolloConfig loadApolloConfig() {
-    m_loadConfigRateLimiter.acquire();
+    m_loadConfigRateLimiter.tryAcquire(5, TimeUnit.SECONDS);//wait at most 5 seconds
     String appId = m_configUtil.getAppId();
     String cluster = m_configUtil.getCluster();
     String dataCenter = m_configUtil.getDataCenter();
@@ -285,7 +285,7 @@ public class RemoteConfigRepository extends AbstractConfigRepository {
     final Random random = new Random();
     ServiceDTO lastServiceDto = null;
     while (!m_longPollingStopped.get() && !Thread.currentThread().isInterrupted()) {
-      m_longPollRateLimiter.acquire();
+      m_longPollRateLimiter.tryAcquire(5, TimeUnit.SECONDS);//wait at most 5 seconds
       Transaction transaction = Cat.newTransaction("Apollo.ConfigService", "pollNotification");
       try {
         if (lastServiceDto == null) {