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7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill="currentColor"></path></svg></a></li><li class="breadcrumbs__item"><span class="breadcrumbs__link">最佳实践</span><meta itemprop="position" content="1"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">订阅关系一致</span><meta itemprop="position" content="2"></li></ul></nav><span class="theme-doc-version-badge badge badge--secondary">版本：4.x</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">本页总览</button></div><div class="theme-doc-markdown markdown"><h1>订阅关系一致</h1><h2 class="anchor anchorWithStickyNavbar_LWe7" id="前言">前言<a href="#前言" class="hash-link" aria-label="前言的直接链接" title="前言的直接链接">​</a></h2><p>订阅关系：一个消费者组订阅一个 Topic 的某一个 Tag，这种记录被称为订阅关系。</p><p>订阅关系一致：同一个消费者组下所有消费者实例所订阅的Topic、Tag必须完全一致。如果订阅关系（消费者组名-Topic-Tag）不一致，会导致消费消息紊乱，甚至消息丢失。</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="1--正确订阅关系示例">1 正确订阅关系示例<a href="#1--正确订阅关系示例" class="hash-link" aria-label="1 正确订阅关系示例的直接链接" title="1 正确订阅关系示例的直接链接">​</a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="11-订阅一个topic且订阅一个tag">1.1 订阅一个Topic且订阅一个Tag<a href="#11-订阅一个topic且订阅一个tag" class="hash-link" aria-label="1.1 订阅一个Topic且订阅一个Tag的直接链接" title="1.1 订阅一个Topic且订阅一个Tag的直接链接">​</a></h3><p>如下图所示，同一Group ID下的三个Consumer实例C1、C2和C3分别都订阅了TopicA，且订阅TopicA的Tag也都是Tag1，符合订阅关系一致原则。</p><p><img loading="lazy" alt="1658453577894-0e64b114-cb4a-4220-a09a-62bc1f2943c6" src="/zh/assets/images/4.x订阅关系一致-1-4cbab04c03d85562d7d144edfeb86aa6.jpeg" width="662" height="482" class="img_ev3q"></p><p><strong>正确示例代码一</strong></p><p>C1、C2、C3的订阅关系一致，即C1、C2、C3订阅消息的代码必须完全一致，代码示例如下：</p><div class="language-java codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-java codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain"> Properties properties = new Properties();</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> properties.put(PropertyKeyConst.GROUP_ID, &quot;GID_test_1&quot;);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> Consumer consumer = ONSFactory.createConsumer(properties);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> consumer.subscribe(&quot;TopicA&quot;, &quot;Tag1&quot;, new MessageListener() {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> public Action consume(Message message, ConsumeContext context) {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> System.out.println(message.getMsgID());</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> return Action.CommitMessage;</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }); </span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="12-订阅一个topic且订阅多个tag">1.2 订阅一个Topic且订阅多个Tag<a href="#12-订阅一个topic且订阅多个tag" class="hash-link" aria-label="1.2 订阅一个Topic且订阅多个Tag的直接链接" title="1.2 订阅一个Topic且订阅多个Tag的直接链接">​</a></h3><p>如下图所示，同一Group ID下的三个Consumer实例C1、C2和C3分别都订阅了TopicB，订阅TopicB的Tag也都是Tag2和Tag3，表示订阅TopicB中所有Tag为Tag2或Tag3的消息，且顺序一致都是Tag2||Tag3，符合订阅关系一致性原则。</p><p><img loading="lazy" alt="1658453865541-118b0cd0-d597-4a76-9561-ae765540567c" src="/zh/assets/images/4.x订阅关系一致-2-4ea9614e13393725496776d2a5668b43.jpeg" width="857" height="610" class="img_ev3q"></p><p><strong>正确示例代码二</strong></p><p>C1、C2、C3的订阅关系一致，即C1、C2、C3订阅消息的代码必须完全一致，代码示例如下：</p><div class="language-java codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-java codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain"> Properties properties = new Properties();</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> properties.put(PropertyKeyConst.GROUP_ID, &quot;GID_test_2&quot;);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> Consumer consumer = ONSFactory.createConsumer(properties);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> consumer.subscribe(&quot;TopicB&quot;, &quot;Tag2||Tag3&quot;, new MessageListener() {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> public Action consume(Message message, ConsumeContext context) {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> System.out.println(message.getMsgID());</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> return Action.CommitMessage;</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }); </span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="13-订阅多个topic且订阅多个tag">1.3 订阅多个Topic且订阅多个Tag<a href="#13-订阅多个topic且订阅多个tag" class="hash-link" aria-label="1.3 订阅多个Topic且订阅多个Tag的直接链接" title="1.3 订阅多个Topic且订阅多个Tag的直接链接">​</a></h3><p>如下图所示，同一Group ID下的三个Consumer实例C1、C2和C3分别都订阅了TopicA和TopicB，且订阅的TopicA都未指定Tag，即订阅TopicA中的所有消息，订阅的TopicB的Tag都是Tag2和Tag3，表示订阅TopicB中所有Tag为Tag2或Tag3的消息，且顺序一致都是Tag2||Tag3，符合订阅关系一致原则。</p><p><img loading="lazy" alt="1658454292557-c07fa0ac-81be-4aac-9c5b-342821c554a6" src="/zh/assets/images/4.x订阅关系一致-3-085b3104a879045cd04b876911351e21.jpeg" width="868" height="616" class="img_ev3q"></p><p><strong>正确示例代码三</strong></p><p>C1、C2、C3的订阅关系一致，即C1、C2、C3订阅消息的代码必须完全一致，代码示例如下：</p><div class="language-java codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-java codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain"> Properties properties = new Properties();</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> properties.put(PropertyKeyConst.GROUP_ID, &quot;GID_test_3&quot;);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> Consumer consumer = ONSFactory.createConsumer(properties);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> consumer.subscribe(&quot;TopicA&quot;, &quot;*&quot;, new MessageListener() {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> public Action consume(Message message, ConsumeContext context) {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> System.out.println(message.getMsgID());</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> return Action.CommitMessage;</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }); </span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> consumer.subscribe(&quot;TopicB&quot;, &quot;Tag2||Tag3&quot;, new MessageListener() {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> public Action consume(Message message, ConsumeContext context) {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> System.out.println(message.getMsgID());</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> return Action.CommitMessage;</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }); </span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="2-订阅关系不一致的排查">2 订阅关系不一致的排查<a href="#2-订阅关系不一致的排查" class="hash-link" aria-label="2 订阅关系不一致的排查的直接链接" title="2 订阅关系不一致的排查的直接链接">​</a></h2><p><strong>问题描述</strong></p><p>在使用消息队列RocketMQ版实例时，可能会出现订阅关系不一致的情况，具体的问题现象如下：</p><ul><li>消息队列RocketMQ版控制台中订阅关系是否一致显示为否。</li><li>消费者（Consumer）实例未收到订阅的消息。</li></ul><p><strong>请参考以下步骤进行检查</strong></p><p>您可在消息消息队列RocketMQ版控制台Group 详情页面查看指定Group的订阅关系是否一致。若查询结果不一致，请参见本文(3 常见订阅关系不一致问题)排查Consumer实例的消费代码。</p><ol><li>检查您Consumer实例中与订阅相关的配置代码，确保配置同一个Group ID的所有Consumer实例均订阅相同的Topic及Tag。</li><li>重启客户端应用。</li><li>登录<a href="https://ons.console.aliyun.com/" target="_blank" rel="noopener noreferrer">消息队列RocketMQ版控制台</a>，在左侧导航栏中单击实例列表，选择您的目标实例，进入实例详情页面。</li><li>在左侧导航栏中单击Group管理，选择对应的协议后，单击消费者状态，确认订阅关系是否一致显示为是。</li><li>测试并确认消息能够被预期的Consumer实例所消费。</li></ol><h2 class="anchor anchorWithStickyNavbar_LWe7" id="3-常见订阅关系不一致问题">3 常见订阅关系不一致问题<a href="#3-常见订阅关系不一致问题" class="hash-link" aria-label="3 常见订阅关系不一致问题的直接链接" title="3 常见订阅关系不一致问题的直接链接">​</a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="31-同一group-id下的consumer实例订阅的topic不同">3.1 同一Group ID下的Consumer实例订阅的Topic不同<a href="#31-同一group-id下的consumer实例订阅的topic不同" class="hash-link" aria-label="3.1 同一Group ID下的Consumer实例订阅的Topic不同的直接链接" title="3.1 同一Group ID下的Consumer实例订阅的Topic不同的直接链接">​</a></h3><p>如下图所示，同一Group ID下的三个Consumer实例C1、C2和C3分别订阅了TopicA、TopicB和TopicC，订阅的Topic不一致，不符合订阅关系一致性原则。</p><p><img loading="lazy" alt="image-20220722102131073" src="/zh/assets/images/4.x订阅关系一致-4-41010fd8c9c21c928807228caaf2d621.jpeg" width="881" height="621" class="img_ev3q"></p><p><strong>错误示例代码一</strong></p><ul><li><p>Consumer实例1-1：</p><div class="language-java codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-java codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain"> Properties properties = new Properties();</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> properties.put(PropertyKeyConst.GROUP_ID, &quot;GID_test_1&quot;);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> Consumer consumer = ONSFactory.createConsumer(properties);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> consumer.subscribe(&quot;TopicA&quot;, &quot;*&quot;, new MessageListener() {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> public Action consume(Message message, ConsumeContext context) {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> System.out.println(message.getMsgID());</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> return Action.CommitMessage;</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> });</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li><li><p>Consumer实例1-2：</p><div class="language-java codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-java codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain"> Properties properties = new Properties();</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> properties.put(PropertyKeyConst.GROUP_ID, &quot;GID_test_1&quot;);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> Consumer consumer = ONSFactory.createConsumer(properties);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> consumer.subscribe(&quot;TopicB&quot;, &quot;*&quot;, new MessageListener() {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> public Action consume(Message message, ConsumeContext context) {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> System.out.println(message.getMsgID());</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> return Action.CommitMessage;</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> });</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li><li><p>Consumer实例1-3：</p><div class="language-java codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-java codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain"> Properties properties = new Properties();</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> properties.put(PropertyKeyConst.GROUP_ID, &quot;GID_test_1&quot;);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> Consumer consumer = ONSFactory.createConsumer(properties);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> consumer.subscribe(&quot;TopicC&quot;, &quot;*&quot;, new MessageListener() {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> public Action consume(Message message, ConsumeContext context) {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> System.out.println(message.getMsgID());</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> return Action.CommitMessage;</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> });</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li></ul><h3 class="anchor anchorWithStickyNavbar_LWe7" id="32-同一group-id下的consumer实例订阅的topic相同但订阅的tag不一致">3.2 同一Group ID下的Consumer实例订阅的Topic相同，但订阅的Tag不一致<a href="#32-同一group-id下的consumer实例订阅的topic相同但订阅的tag不一致" class="hash-link" aria-label="3.2 同一Group ID下的Consumer实例订阅的Topic相同，但订阅的Tag不一致的直接链接" title="3.2 同一Group ID下的Consumer实例订阅的Topic相同，但订阅的Tag不一致的直接链接">​</a></h3><p>如下图所示，同一Group ID下的三个Consumer实例C1、C2和C3分别都订阅了TopicA，但是C1订阅TopicA的Tag为<strong>Tag1</strong>，C2和C3订阅的TopicA的Tag为<strong>Tag2</strong>，订阅同一Topic的Tag不一致，不符合订阅关系一致性原则。</p><p><img loading="lazy" alt="image-20220722102926055" src="/zh/assets/images/4.x订阅关系一致-5-514888130c9907fb857a159181ff71cc.jpeg" width="867" height="608" class="img_ev3q"></p><p><strong>错误示例代码二</strong></p><ul><li><p>Consumer实例2-1：</p><div class="language-java codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-java codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain"> Properties properties = new Properties();</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> properties.put(PropertyKeyConst.GROUP_ID, &quot;GID_test_2&quot;);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> Consumer consumer = ONSFactory.createConsumer(properties);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> consumer.subscribe(&quot;TopicA&quot;, &quot;Tag1&quot;, new MessageListener() {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> public Action consume(Message message, ConsumeContext context) {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> System.out.println(message.getMsgID());</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> return Action.CommitMessage;</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }); </span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li></ul><ul><li><p>Consumer实例2-2：</p><div class="language-java codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-java codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain"> Properties properties = new Properties();</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> properties.put(PropertyKeyConst.GROUP_ID, &quot;GID_test_2&quot;);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> Consumer consumer = ONSFactory.createConsumer(properties);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> consumer.subscribe(&quot;TopicA&quot;, &quot;Tag2&quot;, new MessageListener() {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> public Action consume(Message message, ConsumeContext context) {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> System.out.println(message.getMsgID());</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> return Action.CommitMessage;</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }); </span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li><li><p>Consumer实例2-3：</p><div class="language-java codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-java codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain"> Properties properties = new Properties();</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> properties.put(PropertyKeyConst.GROUP_ID, &quot;GID_test_2&quot;);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> Consumer consumer = ONSFactory.createConsumer(properties);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> consumer.subscribe(&quot;TopicA&quot;, &quot;Tag2&quot;, new MessageListener() {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> public Action consume(Message message, ConsumeContext context) {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> System.out.println(message.getMsgID());</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> return Action.CommitMessage;</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }); </span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li></ul></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/apache/rocketmq-site/tree/new-official-website/docs/05-bestPractice/07subscribe.md" target="_blank" rel="noreferrer noopener" 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table-of-contents__left-border"><li><a href="#前言" class="table-of-contents__link toc-highlight">前言</a></li><li><a href="#1--正确订阅关系示例" class="table-of-contents__link toc-highlight">1 正确订阅关系示例</a><ul><li><a href="#11-订阅一个topic且订阅一个tag" class="table-of-contents__link toc-highlight">1.1 订阅一个Topic且订阅一个Tag</a></li><li><a href="#12-订阅一个topic且订阅多个tag" class="table-of-contents__link toc-highlight">1.2 订阅一个Topic且订阅多个Tag</a></li><li><a href="#13-订阅多个topic且订阅多个tag" class="table-of-contents__link toc-highlight">1.3 订阅多个Topic且订阅多个Tag</a></li></ul></li><li><a href="#2-订阅关系不一致的排查" class="table-of-contents__link toc-highlight">2 订阅关系不一致的排查</a></li><li><a href="#3-常见订阅关系不一致问题" class="table-of-contents__link toc-highlight">3 常见订阅关系不一致问题</a><ul><li><a href="#31-同一group-id下的consumer实例订阅的topic不同" class="table-of-contents__link toc-highlight">3.1 同一Group ID下的Consumer实例订阅的Topic不同</a></li><li><a href="#32-同一group-id下的consumer实例订阅的topic相同但订阅的tag不一致" class="table-of-contents__link toc-highlight">3.2 同一Group ID下的Consumer实例订阅的Topic相同，但订阅的Tag不一致</a></li></ul></li></ul></div></div></div></div></main></div></div><footer class="footer footer--dark"><div class="container container-fluid"><div class="row footer__links"><div class="col footer__col"><div class="footer__title">Learn</div><ul class="footer__items clean-list"><li class="footer__item"><a class="footer__link-item" href="/zh/docs/domainModel/01main">Introduction</a></li><li class="footer__item"><a class="footer__link-item" href="/zh/docs/quickStart/01quickstart">Installation</a></li><li class="footer__item"><a class="footer__link-item" href="/zh/version">Migration from 4.x to 5.0</a></li></ul></div><div class="col footer__col"><div class="footer__title">Community</div><ul class="footer__items clean-list"><li class="footer__item"><a href="https://twitter.com/ApacheRocketMQ" target="_blank" rel="noopener noreferrer" class="footer__link-item">Twitter<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" 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