<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: 2.6.2</li>
<li>Operating System version: centos 6.8</li>
<li>Java version: java 8</li>
</ul>
<p dir="auto">服务在发布后，请求开始打到我们的api应用，api应用再去调后面的rpc应用，刚开始会产生大量超时，通过日志分析，时间消耗在消费者自身，并非提供者服务慢。请问消费者消费的238ms大概是什么原因导致的，请协助提供一下思路</p>
<p dir="auto">If there is an exception, please attach the exception trace:</p>
<p dir="auto">client elapsed: 238 ms, server elapsed: 65 ms, timeout: 300 ms</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="Just put your stack trace here!"><pre class="notranslate"><code class="notranslate">Just put your stack trace here!
</code></pre></div>
<ul class="contains-task-list">
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> 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" checked=""> 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: 2.7.7</li>
<li>Operating System version: macOS</li>
<li>Java version: 1.8u251</li>
</ul>
<p dir="auto">as I use dubbo spring boot ,  just wonder how to specify the serialization type like kryo or protobuff in <code class="notranslate">@DubboService</code> annotation ?</p>