<ul dir="auto">
<li>[ <g-emoji class="g-emoji" alias="heavy_check_mark" fallback-src="https://github.githubassets.com/images/icons/emoji/unicode/2714.png">✔</g-emoji>] I have searched the <a href="https://github.com/apache/dubbo/issues">issues</a> of this repository and believe that this is not a duplicate.</li>
<li>[ <g-emoji class="g-emoji" alias="heavy_check_mark" fallback-src="https://github.githubassets.com/images/icons/emoji/unicode/2714.png">✔</g-emoji>] I have checked the <a href="https://github.com/apache/dubbo/blob/master/FAQ.md">FAQ</a> of this repository and believe that this is not a duplicate.</li>
</ul>
<h3 dir="auto">Environment</h3>
<ul dir="auto">
<li>Dubbo version: xxx</li>
<li>Operating System version: xxx</li>
<li>Java version: xxx</li>
</ul>
<h3 dir="auto">Steps to reproduce this issue</h3>
<ol dir="auto">
<li>open the "<a href="http://dubbo.apache.org/zh-cn/docs/user/demos/consumer-threadpool.html" rel="nofollow">http://dubbo.apache.org/zh-cn/docs/user/demos/consumer-threadpool.html</a>" on the browser.</li>
<li>the url of "消费端线程池新.png" is incorrect.</li>
</ol>
<h3 dir="auto">Steps to repair the issue.</h3>
<p dir="auto">1.change the url of "消费端线程池新.png" to "/img/docs/consumer-threadpool1.png"</p>
<ul class="contains-task-list">
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> I have searched the <a href="https://github.com/apache/dubbo/issues">issues</a> of this repository and believe that this is not a duplicate.</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> I have checked the <a href="https://github.com/apache/dubbo/blob/master/FAQ.md">FAQ</a> of this repository and believe that this is not a duplicate.</li>
</ul>
<h3 dir="auto">Environment</h3>
<ul dir="auto">
<li>Dubbo version: 27.0</li>
<li>Operating System version: linux</li>
<li>Java version:  jdk1.8+</li>
</ul>
<p dir="auto">generic invoker occure:<br>
java.lang.NoClassDefFoundError: org/apache/curator/framework/recipes/cache/TreeCacheListener</p>