<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: xxx</li>
<li>Operating System version: xxx</li>
<li>Java version: xxx</li>
</ul>
<h3 dir="auto">Steps to reproduce this issue</h3>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/8758457/59562427-2e06c800-905f-11e9-9bff-9ea54d87fc6d.png"><img src="https://user-images.githubusercontent.com/8758457/59562427-2e06c800-905f-11e9-9bff-9ea54d87fc6d.png" alt="image" style="max-width: 100%;"></a><br>
<a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/8758457/59562435-51317780-905f-11e9-930b-a66bc866ccf1.png"><img src="https://user-images.githubusercontent.com/8758457/59562435-51317780-905f-11e9-930b-a66bc866ccf1.png" alt="image" style="max-width: 100%;"></a></p>
<p dir="auto">Pls. provide [GitHub address] to reproduce this issue.</p>
<h3 dir="auto">Expected Result</h3>
<p dir="auto">What do you expected from the above steps？</p>
<h3 dir="auto">Actual Result</h3>
<p dir="auto">What actually happens?</p>
<p dir="auto">If there is an exception, please attach the exception trace:</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 dir="auto">
<li>[√ ] 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>[√ ] 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: 2.7.3  with redis register</li>
<li>Operating System version: WIN10</li>
<li>Java version: JAVA8</li>
<li>SpringBoot framework</li>
</ul>
<p dir="auto">In our production environment, i found the first time dubbo api time consumption is alwarys too long when we re-deploy cluster, sometimes will case some complex dubbo api timeout. any clue to avoid this situation?</p>
<p dir="auto">below is a demo i wrote , also showing first time consumption is always longer than other time, on my computer is firsttime: 100+ms, other times: 10-ms</p>
<p dir="auto">DEMO GitHub address: <a href="https://github.com/KindHunter/dubbo_test.git">https://github.com/KindHunter/dubbo_test.git</a></p>
<h3 dir="auto">Expected Result</h3>
<p dir="auto">Expect every time consumption is similar</p>
<h3 dir="auto">Actual Result</h3>
<p dir="auto">first time call time consumption is always too long!</p>