<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: 2.7.3</li>
<li>Operating System version: Window10</li>
<li>Java version: 1.8</li>
</ul>
<h3 dir="auto">Steps to reproduce this issue</h3>
<ol dir="auto">
<li>open AccessLogFilter</li>
</ol>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="dubbo:
  scan:
    base-packages: ...
  protocol:
    name: dubbo
    port: 12345
  registry:
    address: N/A
  provider:
    accesslog: true"><pre class="notranslate"><code class="notranslate">dubbo:
  scan:
    base-packages: ...
  protocol:
    name: dubbo
    port: 12345
  registry:
    address: N/A
  provider:
    accesslog: true
</code></pre></div>
<ol start="2" dir="auto">
<li>org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper#buildInvokerChain return the AccessLogFilter success</li>
<li>org.apache.dubbo.rpc.filter.AccessLogFilter#invoke</li>
</ol>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="String accessLogKey = invoker.getUrl().getParameter(ACCESS_LOG_KEY);
if (ConfigUtils.isNotEmpty(accessLogKey)) {
    log......
}"><pre class="notranslate"><code class="notranslate">String accessLogKey = invoker.getUrl().getParameter(ACCESS_LOG_KEY);
if (ConfigUtils.isNotEmpty(accessLogKey)) {
    log......
}
</code></pre></div>
<p dir="auto">invoker.getUrl() not contain parameter who's named 'ACCESS_LOG_KEY' but accesslog.<br>
<code class="notranslate">private static final String ACCESS_LOG_KEY = "dubbo.accesslog"; (Line 71 in AccessLogFilter)</code><br>
There is no way to successfully print the log.</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/18323777/63648496-19cbff00-c763-11e9-9560-4080d8da9006.png"><img src="https://user-images.githubusercontent.com/18323777/63648496-19cbff00-c763-11e9-9560-4080d8da9006.png" alt="image" style="max-width: 100%;"></a></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: 2.6</li>
<li>Operating System version: xxx</li>
<li>Java version: 1.8</li>
</ul>
<h3 dir="auto">Steps to reproduce this issue</h3>
<ol dir="auto">
<li>xxx</li>
<li>xxx</li>
<li>xxx</li>
</ol>
<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>