fix Zookeeper does not start, printed logs have no error messages, Api services can start but cannot be accessed

dolphinscheduler-service/src/main/java/org/apache/dolphinscheduler/service/zk/CuratorZookeeperClient.java

@@ -24,6 +24,7 @@ import org.apache.curator.framework.state.ConnectionState;
 import org.apache.curator.retry.ExponentialBackoffRetry;
 import org.apache.zookeeper.ZooDefs;
 import org.apache.zookeeper.data.ACL;
+
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.InitializingBean;
@@ -32,6 +33,7 @@ import org.springframework.stereotype.Component;
 
 import java.nio.charset.StandardCharsets;
 import java.util.List;
+import java.util.concurrent.TimeUnit;
 
 import static org.apache.dolphinscheduler.common.utils.Preconditions.checkNotNull;
 
@@ -55,9 +57,10 @@ public class CuratorZookeeperClient implements InitializingBean {
     }
 
     private CuratorFramework buildClient() {
-        logger.info("zookeeper registry center init, server lists is: {}.", zookeeperConfig.getServerList());
+        logger.info("zookeeper registry center init, server lists is: [{}]", zookeeperConfig.getServerList());
 
-        CuratorFrameworkFactory.Builder builder = CuratorFrameworkFactory.builder().ensembleProvider(new DefaultEnsembleProvider(checkNotNull(zookeeperConfig.getServerList(),"zookeeper quorum can't be null")))
+        CuratorFrameworkFactory.Builder builder = CuratorFrameworkFactory.builder()
+                .ensembleProvider(new DefaultEnsembleProvider(checkNotNull(zookeeperConfig.getServerList(), "zookeeper quorum can't be null")))
                 .retryPolicy(new ExponentialBackoffRetry(zookeeperConfig.getBaseSleepTimeMs(), zookeeperConfig.getMaxRetries(), zookeeperConfig.getMaxSleepMs()));
 
         //these has default value
@@ -84,7 +87,9 @@ public class CuratorZookeeperClient implements InitializingBean {
         zkClient = builder.build();
         zkClient.start();
         try {
-            zkClient.blockUntilConnected();
+            logger.info("trying to connect zookeeper server list:{}", zookeeperConfig.getServerList());
+            zkClient.blockUntilConnected(30, TimeUnit.SECONDS);
+
         } catch (final Exception ex) {
             throw new RuntimeException(ex);
         }
@@ -95,12 +100,14 @@ public class CuratorZookeeperClient implements InitializingBean {
         checkNotNull(zkClient);
 
         zkClient.getConnectionStateListenable().addListener((client, newState) -> {
-            if(newState == ConnectionState.LOST){
+            if (newState == ConnectionState.LOST) {
                 logger.error("connection lost from zookeeper");
-            } else if(newState == ConnectionState.RECONNECTED){
+            } else if (newState == ConnectionState.RECONNECTED) {
                 logger.info("reconnected to zookeeper");
-            } else if(newState == ConnectionState.SUSPENDED){
+            } else if (newState == ConnectionState.SUSPENDED) {
                 logger.warn("connection SUSPENDED to zookeeper");
+            } else if (newState == ConnectionState.CONNECTED) {
+                logger.info("connected to zookeeper server list:[{}]", zookeeperConfig.getServerList());
             }
         });
     }

dolphinscheduler-service/src/test/java/org/apache/dolphinscheduler/service/zk/CuratorZookeeperClientTest.java

@@ -59,9 +59,8 @@ public class CuratorZookeeperClientTest {
         zookeeperConfig.setDsRoot("/dolphinscheduler");
         zookeeperConfig.setMaxWaitTime(30000);
         zookeeperClient.setZookeeperConfig(zookeeperConfig);
-        System.out.println("start");
         zookeeperClient.afterPropertiesSet();
-        System.out.println("end");
+
         Assert.assertNotNull(zookeeperClient.getZkClient());
     }
 }