[ISSUE 504] Polish 'No route info of this topic' exception (#1415)

* Polish 'no route info of this topic' exception.

* Write exception to log

* Modify logic that cannot connect to nameserver

* Solve the problem that the regression test does not pass.

* Adapt to lite pull consumer

* Make checkNameServerSetting function private and change its name.

client/src/main/java/org/apache/rocketmq/client/impl/MQClientManager.java

@@ -40,11 +40,11 @@ public class MQClientManager {
         return instance;
     }
 
-    public MQClientInstance getAndCreateMQClientInstance(final ClientConfig clientConfig) {
-        return getAndCreateMQClientInstance(clientConfig, null);
+    public MQClientInstance getOrCreateMQClientInstance(final ClientConfig clientConfig) {
+        return getOrCreateMQClientInstance(clientConfig, null);
     }
 
-    public MQClientInstance getAndCreateMQClientInstance(final ClientConfig clientConfig, RPCHook rpcHook) {
+    public MQClientInstance getOrCreateMQClientInstance(final ClientConfig clientConfig, RPCHook rpcHook) {
         String clientId = clientConfig.buildMQClientId();
         MQClientInstance instance = this.factoryTable.get(clientId);
         if (null == instance) {

client/src/main/java/org/apache/rocketmq/client/impl/consumer/DefaultLitePullConsumerImpl.java

@@ -272,7 +272,7 @@ public class DefaultLitePullConsumerImpl implements MQConsumerInner {
     }
 
     private void initMQClientFactory() throws MQClientException {
-        this.mQClientFactory = MQClientManager.getInstance().getAndCreateMQClientInstance(this.defaultLitePullConsumer, this.rpcHook);
+        this.mQClientFactory = MQClientManager.getInstance().getOrCreateMQClientInstance(this.defaultLitePullConsumer, this.rpcHook);
         boolean registerOK = mQClientFactory.registerConsumer(this.defaultLitePullConsumer.getConsumerGroup(), this);
         if (!registerOK) {
             this.serviceState = ServiceState.CREATE_JUST;

client/src/main/java/org/apache/rocketmq/client/impl/consumer/DefaultMQPullConsumerImpl.java

@@ -634,7 +634,7 @@ public class DefaultMQPullConsumerImpl implements MQConsumerInner {
                     this.defaultMQPullConsumer.changeInstanceNameToPID();
                 }
 
-                this.mQClientFactory = MQClientManager.getInstance().getAndCreateMQClientInstance(this.defaultMQPullConsumer, this.rpcHook);
+                this.mQClientFactory = MQClientManager.getInstance().getOrCreateMQClientInstance(this.defaultMQPullConsumer, this.rpcHook);
 
                 this.rebalanceImpl.setConsumerGroup(this.defaultMQPullConsumer.getConsumerGroup());
                 this.rebalanceImpl.setMessageModel(this.defaultMQPullConsumer.getMessageModel());

client/src/main/java/org/apache/rocketmq/client/impl/consumer/DefaultMQPushConsumerImpl.java

@@ -579,7 +579,7 @@ public class DefaultMQPushConsumerImpl implements MQConsumerInner {
                     this.defaultMQPushConsumer.changeInstanceNameToPID();
                 }
 
-                this.mQClientFactory = MQClientManager.getInstance().getAndCreateMQClientInstance(this.defaultMQPushConsumer, this.rpcHook);
+                this.mQClientFactory = MQClientManager.getInstance().getOrCreateMQClientInstance(this.defaultMQPushConsumer, this.rpcHook);
 
                 this.rebalanceImpl.setConsumerGroup(this.defaultMQPushConsumer.getConsumerGroup());
                 this.rebalanceImpl.setMessageModel(this.defaultMQPushConsumer.getMessageModel());

client/src/main/java/org/apache/rocketmq/client/impl/factory/MQClientInstance.java

@@ -362,7 +362,6 @@ public class MQClientInstance {
     }
 
     /**
-     *
      * @param offsetTable
      * @param namespace
      * @return newOffsetTable
@@ -381,6 +380,7 @@ public class MQClientInstance {
 
         return newOffsetTable;
     }
+
     /**
      * Remove offline broker
      */
@@ -672,10 +672,13 @@ public class MQClientInstance {
                     } else {
                         log.warn("updateTopicRouteInfoFromNameServer, getTopicRouteInfoFromNameServer return null, Topic: {}", topic);
                     }
-                } catch (Exception e) {
+                } catch (MQClientException e) {
                     if (!topic.startsWith(MixAll.RETRY_GROUP_TOPIC_PREFIX) && !topic.equals(MixAll.AUTO_CREATE_TOPIC_KEY_TOPIC)) {
                         log.warn("updateTopicRouteInfoFromNameServer Exception", e);
                     }
+                } catch (RemotingException e) {
+                    log.error("updateTopicRouteInfoFromNameServer Exception", e);
+                    throw new IllegalStateException(e);
                 } finally {
                     this.lockNamesrv.unlock();
                 }
@@ -739,9 +742,10 @@ public class MQClientInstance {
 
         return false;
     }
+
     /**
-     * This method will be removed in the version 5.0.0,because filterServer was removed,and method <code>subscribe(final String topic, final MessageSelector messageSelector)</code>
-     * is recommended.
+     * This method will be removed in the version 5.0.0,because filterServer was removed,and method
+     * <code>subscribe(final String topic, final MessageSelector messageSelector)</code> is recommended.
      */
     @Deprecated
     private void uploadFilterClassToAllFilterServer(final String consumerGroup, final String fullClassName,

client/src/main/java/org/apache/rocketmq/client/impl/producer/DefaultMQProducerImpl.java

@@ -180,7 +180,7 @@ public class DefaultMQProducerImpl implements MQProducerInner {
                     this.defaultMQProducer.changeInstanceNameToPID();
                 }
 
-                this.mQClientFactory = MQClientManager.getInstance().getAndCreateMQClientInstance(this.defaultMQProducer, rpcHook);
+                this.mQClientFactory = MQClientManager.getInstance().getOrCreateMQClientInstance(this.defaultMQProducer, rpcHook);
 
                 boolean registerOK = mQClientFactory.registerProducer(this.defaultMQProducer.getProducerGroup(), this);
                 if (!registerOK) {
@@ -271,6 +271,7 @@ public class DefaultMQProducerImpl implements MQProducerInner {
 
     /**
      * This method will be removed in the version 5.0.0 and <code>getCheckListener</code> is recommended.
+     *
      * @return
      */
     @Override
@@ -469,8 +470,9 @@ public class DefaultMQProducerImpl implements MQProducerInner {
     }
 
     /**
-     * It will be removed at 4.4.0 cause for exception handling and the wrong Semantics of timeout.
-     * A new one will be provided in next version
+     * It will be removed at 4.4.0 cause for exception handling and the wrong Semantics of timeout. A new one will be
+     * provided in next version
+     *
      * @param msg
      * @param sendCallback
      * @param timeout the <code>sendCallback</code> will be invoked at most time
@@ -505,7 +507,6 @@ public class DefaultMQProducerImpl implements MQProducerInner {
 
     }
 
-
     public MessageQueue selectOneMessageQueue(final TopicPublishInfo tpInfo, final String lastBrokerName) {
         return this.mqFaultStrategy.selectOneMessageQueue(tpInfo, lastBrokerName);
     }
@@ -514,6 +515,15 @@ public class DefaultMQProducerImpl implements MQProducerInner {
         this.mqFaultStrategy.updateFaultItem(brokerName, currentLatency, isolation);
     }
 
+    private void validateNameServerSetting() throws MQClientException {
+        List<String> nsList = this.getmQClientFactory().getMQClientAPIImpl().getNameServerAddressList();
+        if (null == nsList || nsList.isEmpty()) {
+            throw new MQClientException(
+                "No name server address, please set it." + FAQUrl.suggestTodo(FAQUrl.NAME_SERVER_ADDR_NOT_EXIST_URL), null).setResponseCode(ClientErrorCode.NO_NAME_SERVER_EXCEPTION);
+        }
+
+    }
+
     private SendResult sendDefaultImpl(
         Message msg,
         final CommunicationMode communicationMode,
@@ -522,7 +532,6 @@ public class DefaultMQProducerImpl implements MQProducerInner {
     ) throws MQClientException, RemotingException, MQBrokerException, InterruptedException {
         this.makeSureStateOK();
         Validators.checkMessage(msg, this.defaultMQProducer);
-
         final long invokeID = random.nextLong();
         long beginTimestampFirst = System.currentTimeMillis();
         long beginTimestampPrev = beginTimestampFirst;
@@ -653,13 +662,9 @@ public class DefaultMQProducerImpl implements MQProducerInner {
             throw mqClientException;
         }
 
-        List<String> nsList = this.getmQClientFactory().getMQClientAPIImpl().getNameServerAddressList();
-        if (null == nsList || nsList.isEmpty()) {
-            throw new MQClientException(
-                "No name server address, please set it." + FAQUrl.suggestTodo(FAQUrl.NAME_SERVER_ADDR_NOT_EXIST_URL), null).setResponseCode(ClientErrorCode.NO_NAME_SERVER_EXCEPTION);
-        }
+        validateNameServerSetting();
 
-        throw new MQClientException("No route info of this topic, " + msg.getTopic() + FAQUrl.suggestTodo(FAQUrl.NO_TOPIC_ROUTE_INFO),
+        throw new MQClientException("No route info of this topic: " + msg.getTopic() + FAQUrl.suggestTodo(FAQUrl.NO_TOPIC_ROUTE_INFO),
             null).setResponseCode(ClientErrorCode.NOT_FOUND_TOPIC_EXCEPTION);
     }
 
@@ -990,8 +995,9 @@ public class DefaultMQProducerImpl implements MQProducerInner {
     }
 
     /**
-     * It will be removed at 4.4.0 cause for exception handling and the wrong Semantics of timeout.
-     * A new one will be provided in next version
+     * It will be removed at 4.4.0 cause for exception handling and the wrong Semantics of timeout. A new one will be
+     * provided in next version
+     *
      * @param msg
      * @param mq
      * @param sendCallback
@@ -1105,6 +1111,7 @@ public class DefaultMQProducerImpl implements MQProducerInner {
             }
         }
 
+        validateNameServerSetting();
         throw new MQClientException("No route info for this topic, " + msg.getTopic(), null);
     }
 
@@ -1117,8 +1124,9 @@ public class DefaultMQProducerImpl implements MQProducerInner {
     }
 
     /**
-     * It will be removed at 4.4.0 cause for exception handling and the wrong Semantics of timeout.
-     * A new one will be provided in next version
+     * It will be removed at 4.4.0 cause for exception handling and the wrong Semantics of timeout. A new one will be
+     * provided in next version
+     *
      * @param msg
      * @param selector
      * @param arg
@@ -1129,7 +1137,8 @@ public class DefaultMQProducerImpl implements MQProducerInner {
      * @throws InterruptedException
      */
     @Deprecated
-    public void send(final Message msg, final MessageQueueSelector selector, final Object arg, final SendCallback sendCallback, final long timeout)
+    public void send(final Message msg, final MessageQueueSelector selector, final Object arg,
+        final SendCallback sendCallback, final long timeout)
         throws MQClientException, RemotingException, InterruptedException {
         final long beginStartTime = System.currentTimeMillis();
         ExecutorService executor = this.getAsyncSenderExecutor();

client/src/test/java/org/apache/rocketmq/client/consumer/DefaultLitePullConsumerTest.java

@@ -53,8 +53,10 @@ import org.junit.runner.RunWith;
 import org.mockito.Mock;
 import org.mockito.Spy;
 import org.mockito.invocation.InvocationOnMock;
-import org.mockito.junit.MockitoJUnitRunner;
 import org.mockito.stubbing.Answer;
+import org.powermock.api.mockito.PowerMockito;
+import org.powermock.core.classloader.annotations.PrepareForTest;
+import org.powermock.modules.junit4.PowerMockRunner;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Fail.failBecauseExceptionWasNotThrown;
@@ -68,10 +70,11 @@ import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.when;
 
-@RunWith(MockitoJUnitRunner.class)
+@RunWith(PowerMockRunner.class)
+@PrepareForTest(DefaultLitePullConsumerImpl.class)
 public class DefaultLitePullConsumerTest {
     @Spy
-    private MQClientInstance mQClientFactory = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private MQClientInstance mQClientFactory = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
 
     @Mock
     private MQClientAPIImpl mQClientAPIImpl;
@@ -88,6 +91,7 @@ public class DefaultLitePullConsumerTest {
 
     @Before
     public void init() throws Exception {
+        PowerMockito.suppress(PowerMockito.method(DefaultLitePullConsumerImpl.class, "updateTopicSubscribeInfoWhenSubscriptionChanged"));
         Field field = MQClientInstance.class.getDeclaredField("rebalanceService");
         field.setAccessible(true);
         RebalanceService rebalanceService = (RebalanceService) field.get(mQClientFactory);

client/src/test/java/org/apache/rocketmq/client/consumer/DefaultMQPullConsumerTest.java

@@ -54,7 +54,7 @@ import static org.mockito.Mockito.when;
 @RunWith(MockitoJUnitRunner.class)
 public class DefaultMQPullConsumerTest {
     @Spy
-    private MQClientInstance mQClientFactory = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private MQClientInstance mQClientFactory = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     @Mock
     private MQClientAPIImpl mQClientAPIImpl;
     private DefaultMQPullConsumer pullConsumer;

client/src/test/java/org/apache/rocketmq/client/consumer/DefaultMQPushConsumerTest.java

@@ -59,8 +59,10 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
 import org.mockito.invocation.InvocationOnMock;
-import org.mockito.junit.MockitoJUnitRunner;
 import org.mockito.stubbing.Answer;
+import org.powermock.api.mockito.PowerMockito;
+import org.powermock.core.classloader.annotations.PrepareForTest;
+import org.powermock.modules.junit4.PowerMockRunner;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Fail.failBecauseExceptionWasNotThrown;
@@ -73,7 +75,8 @@ import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.when;
 
-@RunWith(MockitoJUnitRunner.class)
+@RunWith(PowerMockRunner.class)
+@PrepareForTest(DefaultMQPushConsumerImpl.class)
 public class DefaultMQPushConsumerTest {
     private String consumerGroup;
     private String topic = "FooBar";
@@ -102,10 +105,12 @@ public class DefaultMQPushConsumerTest {
         });
 
         DefaultMQPushConsumerImpl pushConsumerImpl = pushConsumer.getDefaultMQPushConsumerImpl();
+        PowerMockito.suppress(PowerMockito.method(DefaultMQPushConsumerImpl.class, "updateTopicSubscribeInfoWhenSubscriptionChanged"));
         rebalancePushImpl = spy(new RebalancePushImpl(pushConsumer.getDefaultMQPushConsumerImpl()));
         Field field = DefaultMQPushConsumerImpl.class.getDeclaredField("rebalanceImpl");
         field.setAccessible(true);
         field.set(pushConsumerImpl, rebalancePushImpl);
+
         pushConsumer.subscribe(topic, "*");
         pushConsumer.start();
 

client/src/test/java/org/apache/rocketmq/client/impl/factory/MQClientInstanceTest.java

@@ -39,7 +39,7 @@ import static org.mockito.Mockito.mock;
 
 @RunWith(MockitoJUnitRunner.class)
 public class MQClientInstanceTest {
-    private MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private String topic = "FooBar";
     private String group = "FooBarGroup";
 

client/src/test/java/org/apache/rocketmq/client/producer/DefaultMQProducerTest.java

@@ -66,7 +66,7 @@ import static org.mockito.Mockito.when;
 @RunWith(MockitoJUnitRunner.class)
 public class DefaultMQProducerTest {
     @Spy
-    private MQClientInstance mQClientFactory = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private MQClientInstance mQClientFactory = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     @Mock
     private MQClientAPIImpl mQClientAPIImpl;
     @Mock
@@ -184,6 +184,7 @@ public class DefaultMQProducerTest {
         });
         countDownLatch.await(3000L, TimeUnit.MILLISECONDS);
     }
+
     @Test
     public void testSendMessageAsync() throws RemotingException, MQClientException, InterruptedException {
         final AtomicInteger cc = new AtomicInteger(0);
@@ -211,12 +212,12 @@ public class DefaultMQProducerTest {
         Message message = new Message();
         message.setTopic("test");
         message.setBody("hello world".getBytes());
-        producer.send(new Message(),sendCallback);
-        producer.send(message,sendCallback,1000);
-        producer.send(message,new MessageQueue(),sendCallback);
-        producer.send(new Message(),new MessageQueue(),sendCallback,1000);
-        producer.send(new Message(),messageQueueSelector,null,sendCallback);
-        producer.send(message,messageQueueSelector,null,sendCallback,1000);
+        producer.send(new Message(), sendCallback);
+        producer.send(message, sendCallback, 1000);
+        producer.send(message, new MessageQueue(), sendCallback);
+        producer.send(new Message(), new MessageQueue(), sendCallback, 1000);
+        producer.send(new Message(), messageQueueSelector, null, sendCallback);
+        producer.send(message, messageQueueSelector, null, sendCallback, 1000);
 
         countDownLatch.await(3000L, TimeUnit.MILLISECONDS);
         assertThat(cc.get()).isEqualTo(6);

client/src/test/java/org/apache/rocketmq/client/trace/DefaultMQConsumerWithTraceTest.java

@@ -70,8 +70,10 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
 import org.mockito.invocation.InvocationOnMock;
-import org.mockito.junit.MockitoJUnitRunner;
 import org.mockito.stubbing.Answer;
+import org.powermock.api.mockito.PowerMockito;
+import org.powermock.core.classloader.annotations.PrepareForTest;
+import org.powermock.modules.junit4.PowerMockRunner;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.ArgumentMatchers.any;
@@ -83,7 +85,8 @@ import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.when;
 
-@RunWith(MockitoJUnitRunner.class)
+@RunWith(PowerMockRunner.class)
+@PrepareForTest(DefaultMQPushConsumerImpl.class)
 public class DefaultMQConsumerWithTraceTest {
     private String consumerGroup;
     private String consumerGroupNormal;
@@ -101,7 +104,6 @@ public class DefaultMQConsumerWithTraceTest {
     private DefaultMQPushConsumer normalPushConsumer;
     private DefaultMQPushConsumer customTraceTopicpushConsumer;
 
-
     private AsyncTraceDispatcher asyncTraceDispatcher;
     private MQClientInstance mQClientTraceFactory;
     @Mock
@@ -112,17 +114,16 @@ public class DefaultMQConsumerWithTraceTest {
     @Before
     public void init() throws Exception {
         consumerGroup = "FooBarGroup" + System.currentTimeMillis();
-        pushConsumer = new DefaultMQPushConsumer(consumerGroup,true,"");
+        pushConsumer = new DefaultMQPushConsumer(consumerGroup, true, "");
         consumerGroupNormal = "FooBarGroup" + System.currentTimeMillis();
-        normalPushConsumer = new DefaultMQPushConsumer(consumerGroupNormal,false,"");
-        customTraceTopicpushConsumer = new DefaultMQPushConsumer(consumerGroup,true,customerTraceTopic);
+        normalPushConsumer = new DefaultMQPushConsumer(consumerGroupNormal, false, "");
+        customTraceTopicpushConsumer = new DefaultMQPushConsumer(consumerGroup, true, customerTraceTopic);
         pushConsumer.setNamesrvAddr("127.0.0.1:9876");
         pushConsumer.setPullInterval(60 * 1000);
 
-        asyncTraceDispatcher = (AsyncTraceDispatcher)pushConsumer.getTraceDispatcher();
+        asyncTraceDispatcher = (AsyncTraceDispatcher) pushConsumer.getTraceDispatcher();
         traceProducer = asyncTraceDispatcher.getTraceProducer();
 
-
         pushConsumer.registerMessageListener(new MessageListenerConcurrently() {
             @Override
             public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs,
@@ -131,12 +132,14 @@ public class DefaultMQConsumerWithTraceTest {
             }
         });
 
+        PowerMockito.suppress(PowerMockito.method(DefaultMQPushConsumerImpl.class, "updateTopicSubscribeInfoWhenSubscriptionChanged"));
         DefaultMQPushConsumerImpl pushConsumerImpl = pushConsumer.getDefaultMQPushConsumerImpl();
         rebalancePushImpl = spy(new RebalancePushImpl(pushConsumer.getDefaultMQPushConsumerImpl()));
         Field field = DefaultMQPushConsumerImpl.class.getDeclaredField("rebalanceImpl");
         field.setAccessible(true);
         field.set(pushConsumerImpl, rebalancePushImpl);
         pushConsumer.subscribe(topic, "*");
+
         pushConsumer.start();
 
         mQClientFactory = spy(pushConsumerImpl.getmQClientFactory());

client/src/test/java/org/apache/rocketmq/client/trace/DefaultMQProducerWithTraceTest.java

@@ -60,7 +60,7 @@ import static org.mockito.Mockito.when;
 public class DefaultMQProducerWithTraceTest {
 
     @Spy
-    private MQClientInstance mQClientFactory = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private MQClientInstance mQClientFactory = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     @Mock
     private MQClientAPIImpl mQClientAPIImpl;
 
@@ -87,7 +87,7 @@ public class DefaultMQProducerWithTraceTest {
         producer.setNamesrvAddr("127.0.0.1:9876");
         normalProducer.setNamesrvAddr("127.0.0.1:9877");
         customTraceTopicproducer.setNamesrvAddr("127.0.0.1:9878");
-        message = new Message(topic, new byte[]{'a', 'b', 'c'});
+        message = new Message(topic, new byte[] {'a', 'b', 'c'});
         asyncTraceDispatcher = (AsyncTraceDispatcher) producer.getTraceDispatcher();
         asyncTraceDispatcher.setTraceTopicName(customerTraceTopic);
         asyncTraceDispatcher.getHostProducer();
@@ -108,7 +108,6 @@ public class DefaultMQProducerWithTraceTest {
         field.setAccessible(true);
         field.set(mQClientFactory, mQClientAPIImpl);
 
-
         producer.getDefaultMQProducerImpl().getmQClientFactory().registerProducer(producerGroupTemp, producer.getDefaultMQProducerImpl());
 
         when(mQClientAPIImpl.sendMessage(anyString(), anyString(), any(Message.class), any(SendMessageRequestHeader.class), anyLong(), any(CommunicationMode.class),

namesrv/src/test/java/org/apache/rocketmq/namesrv/processor/ClusterTestRequestProcessorTest.java

@@ -52,7 +52,7 @@ import static org.mockito.Mockito.when;
 public class ClusterTestRequestProcessorTest {
     private ClusterTestRequestProcessor clusterTestProcessor;
     private DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private MQClientAPIImpl mQClientAPIImpl;
     private ChannelHandlerContext ctx;
 

pom.xml

@@ -106,6 +106,7 @@
         <!-- Exclude all generated code -->
         <sonar.jacoco.itReportPath>${project.basedir}/../test/target/jacoco-it.exec</sonar.jacoco.itReportPath>
         <sonar.exclusions>file:**/generated-sources/**,**/test/**</sonar.exclusions>
+        <powermock.version>2.0.2</powermock.version>
 
     </properties>
 
@@ -458,6 +459,18 @@
             <version>2.23.0</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.powermock</groupId>
+            <artifactId>powermock-module-junit4</artifactId>
+            <version>${powermock.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.powermock</groupId>
+            <artifactId>powermock-api-mockito2</artifactId>
+            <version>${powermock.version}</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <dependencyManagement>

remoting/src/main/java/org/apache/rocketmq/remoting/exception/RemotingConnectException.java

@@ -24,6 +24,6 @@ public class RemotingConnectException extends RemotingException {
     }
 
     public RemotingConnectException(String addr, Throwable cause) {
-        super("connect to <" + addr + "> failed", cause);
+        super("connect to " + addr + " failed", cause);
     }
 }

remoting/src/main/java/org/apache/rocketmq/remoting/netty/NettyRemotingClient.java

@@ -358,8 +358,6 @@ public class NettyRemotingClient extends NettyRemotingAbstract implements Remoti
         }
     }
 
-
-
     @Override
     public RemotingCommand invokeSync(String addr, final RemotingCommand request, long timeoutMillis)
         throws InterruptedException, RemotingConnectException, RemotingSendRequestException, RemotingTimeoutException {
@@ -393,7 +391,7 @@ public class NettyRemotingClient extends NettyRemotingAbstract implements Remoti
         }
     }
 
-    private Channel getAndCreateChannel(final String addr) throws InterruptedException {
+    private Channel getAndCreateChannel(final String addr) throws RemotingConnectException, InterruptedException {
         if (null == addr) {
             return getAndCreateNameserverChannel();
         }
@@ -406,7 +404,7 @@ public class NettyRemotingClient extends NettyRemotingAbstract implements Remoti
         return this.createChannel(addr);
     }
 
-    private Channel getAndCreateNameserverChannel() throws InterruptedException {
+    private Channel getAndCreateNameserverChannel() throws RemotingConnectException, InterruptedException {
         String addr = this.namesrvAddrChoosed.get();
         if (addr != null) {
             ChannelWrapper cw = this.channelTables.get(addr);
@@ -440,9 +438,8 @@ public class NettyRemotingClient extends NettyRemotingAbstract implements Remoti
                             return channelNew;
                         }
                     }
+                    throw new RemotingConnectException(addrList.toString());
                 }
-            } catch (Exception e) {
-                log.error("getAndCreateNameserverChannel: create name server channel exception", e);
             } finally {
                 this.lockNamesrvChannel.unlock();
             }
@@ -587,7 +584,6 @@ public class NettyRemotingClient extends NettyRemotingAbstract implements Remoti
         return channelEventListener;
     }
 
-
     @Override
     public ExecutorService getCallbackExecutor() {
         return callbackExecutor != null ? callbackExecutor : publicExecutor;

tools/src/main/java/org/apache/rocketmq/tools/admin/DefaultMQAdminExtImpl.java

@@ -116,7 +116,7 @@ public class DefaultMQAdminExtImpl implements MQAdminExt, MQAdminExtInner {
 
                 this.defaultMQAdminExt.changeInstanceNameToPID();
 
-                this.mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(this.defaultMQAdminExt, rpcHook);
+                this.mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(this.defaultMQAdminExt, rpcHook);
 
                 boolean registerOK = mqClientInstance.registerAdminExt(this.defaultMQAdminExt.getAdminExtGroup(), this);
                 if (!registerOK) {

tools/src/test/java/org/apache/rocketmq/tools/admin/DefaultMQAdminExtTest.java

@@ -85,7 +85,7 @@ import static org.mockito.Mockito.when;
 public class DefaultMQAdminExtTest {
     private static DefaultMQAdminExt defaultMQAdminExt;
     private static DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private static MQClientAPIImpl mQClientAPIImpl;
     private static Properties properties = new Properties();
     private static TopicList topicList = new TopicList();

tools/src/test/java/org/apache/rocketmq/tools/command/CommandUtilTest.java

@@ -48,7 +48,7 @@ import static org.mockito.Mockito.when;
 public class CommandUtilTest {
     private DefaultMQAdminExt defaultMQAdminExt;
     private DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private MQClientAPIImpl mQClientAPIImpl;
 
     @Before

tools/src/test/java/org/apache/rocketmq/tools/command/broker/BrokerConsumeStatsSubCommadTest.java

@@ -39,7 +39,6 @@ import org.apache.rocketmq.tools.admin.DefaultMQAdminExtImpl;
 import org.apache.rocketmq.tools.command.SubCommandException;
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
-import org.junit.Ignore;
 import org.junit.Test;
 
 import static org.mockito.ArgumentMatchers.anyBoolean;
@@ -54,7 +53,7 @@ public class BrokerConsumeStatsSubCommadTest {
 
     private static DefaultMQAdminExt defaultMQAdminExt;
     private static DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private static MQClientAPIImpl mQClientAPIImpl;
 
     @BeforeClass

tools/src/test/java/org/apache/rocketmq/tools/command/broker/BrokerStatusSubCommandTest.java

@@ -48,7 +48,7 @@ import static org.mockito.Mockito.when;
 public class BrokerStatusSubCommandTest {
     private static DefaultMQAdminExt defaultMQAdminExt;
     private static DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private static MQClientAPIImpl mQClientAPIImpl;
 
     @BeforeClass

tools/src/test/java/org/apache/rocketmq/tools/command/broker/CleanExpiredCQSubCommandTest.java

@@ -46,7 +46,7 @@ import static org.mockito.Mockito.when;
 public class CleanExpiredCQSubCommandTest {
     private static DefaultMQAdminExt defaultMQAdminExt;
     private static DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private static MQClientAPIImpl mQClientAPIImpl;
 
     @BeforeClass

tools/src/test/java/org/apache/rocketmq/tools/command/broker/CleanUnusedTopicCommandTest.java

@@ -46,7 +46,7 @@ import static org.mockito.Mockito.when;
 public class CleanUnusedTopicCommandTest {
     private static DefaultMQAdminExt defaultMQAdminExt;
     private static DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private static MQClientAPIImpl mQClientAPIImpl;
 
     @BeforeClass

tools/src/test/java/org/apache/rocketmq/tools/command/broker/GetBrokerConfigCommandTest.java

@@ -48,7 +48,7 @@ import static org.mockito.Mockito.when;
 public class GetBrokerConfigCommandTest {
     private static DefaultMQAdminExt defaultMQAdminExt;
     private static DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private static MQClientAPIImpl mQClientAPIImpl;
 
     @BeforeClass

tools/src/test/java/org/apache/rocketmq/tools/command/broker/SendMsgStatusCommandTest.java

@@ -41,7 +41,7 @@ import static org.mockito.Mockito.mock;
 public class SendMsgStatusCommandTest {
     private static DefaultMQAdminExt defaultMQAdminExt;
     private static DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private static MQClientAPIImpl mQClientAPIImpl;
 
     @BeforeClass

tools/src/test/java/org/apache/rocketmq/tools/command/broker/UpdateBrokerConfigSubCommandTest.java

@@ -44,7 +44,7 @@ import static org.mockito.Mockito.mock;
 public class UpdateBrokerConfigSubCommandTest {
     private static DefaultMQAdminExt defaultMQAdminExt;
     private static DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private static MQClientAPIImpl mQClientAPIImpl;
 
     @BeforeClass

tools/src/test/java/org/apache/rocketmq/tools/command/connection/ConsumerConnectionSubCommandTest.java

@@ -54,7 +54,7 @@ import static org.mockito.Mockito.when;
 public class ConsumerConnectionSubCommandTest {
     private static DefaultMQAdminExt defaultMQAdminExt;
     private static DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private static MQClientAPIImpl mQClientAPIImpl;
 
     @BeforeClass

tools/src/test/java/org/apache/rocketmq/tools/command/connection/ProducerConnectionSubCommandTest.java

@@ -49,7 +49,7 @@ import static org.mockito.Mockito.when;
 public class ProducerConnectionSubCommandTest {
     private static DefaultMQAdminExt defaultMQAdminExt;
     private static DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private static MQClientAPIImpl mQClientAPIImpl;
 
     @BeforeClass

tools/src/test/java/org/apache/rocketmq/tools/command/consumer/ConsumerProgressSubCommandTest.java

@@ -53,7 +53,7 @@ import static org.mockito.Mockito.when;
 public class ConsumerProgressSubCommandTest {
     private static DefaultMQAdminExt defaultMQAdminExt;
     private static DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private static MQClientAPIImpl mQClientAPIImpl;
 
     @BeforeClass

tools/src/test/java/org/apache/rocketmq/tools/command/consumer/ConsumerStatusSubCommandTest.java

@@ -65,7 +65,7 @@ import static org.mockito.Mockito.when;
 public class ConsumerStatusSubCommandTest {
     private static DefaultMQAdminExt defaultMQAdminExt;
     private static DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private static MQClientAPIImpl mQClientAPIImpl;
 
     @BeforeClass

tools/src/test/java/org/apache/rocketmq/tools/command/message/QueryMsgByUniqueKeySubCommandTest.java

@@ -61,7 +61,7 @@ public class QueryMsgByUniqueKeySubCommandTest {
 
     private static DefaultMQAdminExt defaultMQAdminExt;
     private static DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
 
     private static MQClientAPIImpl mQClientAPIImpl;
     private static MQAdminImpl mQAdminImpl;

tools/src/test/java/org/apache/rocketmq/tools/command/namesrv/GetNamesrvConfigCommandTest.java

@@ -41,7 +41,6 @@ import org.apache.rocketmq.tools.admin.DefaultMQAdminExtImpl;
 import org.apache.rocketmq.tools.command.SubCommandException;
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
-import org.junit.Ignore;
 import org.junit.Test;
 import org.mockito.ArgumentMatchers;
 
@@ -52,7 +51,7 @@ import static org.mockito.Mockito.when;
 public class GetNamesrvConfigCommandTest {
     private static DefaultMQAdminExt defaultMQAdminExt;
     private static DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private static MQClientAPIImpl mQClientAPIImpl;
 
     @BeforeClass

tools/src/test/java/org/apache/rocketmq/tools/command/namesrv/UpdateKvConfigCommandTest.java

@@ -39,7 +39,7 @@ import static org.mockito.Mockito.mock;
 public class UpdateKvConfigCommandTest {
     private static DefaultMQAdminExt defaultMQAdminExt;
     private static DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private static MQClientAPIImpl mQClientAPIImpl;
 
     @BeforeClass

tools/src/test/java/org/apache/rocketmq/tools/command/namesrv/WipeWritePermSubCommandTest.java

@@ -49,7 +49,7 @@ import static org.mockito.Mockito.when;
 public class WipeWritePermSubCommandTest {
     private static DefaultMQAdminExt defaultMQAdminExt;
     private static DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private static MQClientAPIImpl mQClientAPIImpl;
 
     @BeforeClass

tools/src/test/java/org/apache/rocketmq/tools/command/offset/GetConsumerStatusCommandTest.java

@@ -47,7 +47,7 @@ import static org.mockito.Mockito.when;
 public class GetConsumerStatusCommandTest {
     private static DefaultMQAdminExt defaultMQAdminExt;
     private static DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private static MQClientAPIImpl mQClientAPIImpl;
 
     @BeforeClass

tools/src/test/java/org/apache/rocketmq/tools/command/offset/ResetOffsetByTimeCommandTest.java

@@ -53,7 +53,7 @@ import static org.mockito.Mockito.when;
 public class ResetOffsetByTimeCommandTest {
     private static DefaultMQAdminExt defaultMQAdminExt;
     private static DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private static MQClientAPIImpl mQClientAPIImpl;
 
     @BeforeClass

tools/src/test/java/org/apache/rocketmq/tools/monitor/MonitorServiceTest.java

@@ -69,7 +69,7 @@ import static org.mockito.Mockito.when;
 public class MonitorServiceTest {
     private static DefaultMQAdminExt defaultMQAdminExt;
     private static DefaultMQAdminExtImpl defaultMQAdminExtImpl;
-    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getAndCreateMQClientInstance(new ClientConfig());
+    private static MQClientInstance mqClientInstance = MQClientManager.getInstance().getOrCreateMQClientInstance(new ClientConfig());
     private static MQClientAPIImpl mQClientAPIImpl;
     private static MonitorConfig monitorConfig;
     private static MonitorListener monitorListener;