<h1 dir="auto">Weekly Report of Dubbo</h1>
<p dir="auto">This is a weekly report of Dubbo. It summarizes what have changed in the project during the passed week, including pr merged, new contributors, and more things in the future.<br>
It is all done by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/dubbo-bot/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/dubbo-bot">@dubbo-bot</a> which is a collaborate robot.</p>
<h2 dir="auto">Repo Overview</h2>
<h3 dir="auto">Basic data</h3>
<p dir="auto">Baisc data shows how the watch, star, fork and contributors count changed in the passed week.</p>
<table role="table">
<thead>
<tr>
<th align="center">Watch</th>
<th align="center">Star</th>
<th align="center">Fork</th>
<th align="center">Contributors</th>
</tr>
</thead>
<tbody>
<tr>
<td align="center">3240</td>
<td align="center">27450 (↑138)</td>
<td align="center">15448 (↑112)</td>
<td align="center">207 (↑3)</td>
</tr>
</tbody>
</table>
<h3 dir="auto">Issues &amp; PRs</h3>
<p dir="auto">Issues &amp; PRs show the new/closed issues/pull requests count in the passed week.</p>
<table role="table">
<thead>
<tr>
<th align="center">New Issues</th>
<th align="center">Closed Issues</th>
<th align="center">New PR</th>
<th align="center">Merged PR</th>
</tr>
</thead>
<tbody>
<tr>
<td align="center">23</td>
<td align="center">18</td>
<td align="center">24</td>
<td align="center">19</td>
</tr>
</tbody>
</table>
<h2 dir="auto">PR Overview</h2>
<p dir="auto">Thanks to contributions from community, Dubbo team merged <strong>19</strong> pull requests in the repository last week. They are:</p>
<ul dir="auto">
<li>fix <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="461262595" data-permission-text="Title is private" data-url="https://github.com/apache/dubbo/issues/4406" data-hovercard-type="issue" data-hovercard-url="/apache/dubbo/issues/4406/hovercard" href="https://github.com/apache/dubbo/issues/4406">#4406</a> (<a href="https://github.com/apache/dubbo/pull/4408" data-hovercard-type="pull_request" data-hovercard-url="/apache/dubbo/pull/4408/hovercard">#4408</a>)</li>
<li>Polish /<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="457908171" data-permission-text="Title is private" data-url="https://github.com/apache/dubbo/issues/4348" data-hovercard-type="issue" data-hovercard-url="/apache/dubbo/issues/4348/hovercard" href="https://github.com/apache/dubbo/issues/4348">#4348</a> : [ISSUE] Nacos Dubbo Registry can't sense the change (<a href="https://github.com/apache/dubbo/pull/4392" data-hovercard-type="pull_request" data-hovercard-url="/apache/dubbo/pull/4392/hovercard">#4392</a>)</li>
<li>Polish /<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="422839111" data-permission-text="Title is private" data-url="https://github.com/apache/dubbo/issues/3695" data-hovercard-type="issue" data-hovercard-url="/apache/dubbo/issues/3695/hovercard" href="https://github.com/apache/dubbo/issues/3695">#3695</a> : <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/reference/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/reference">@reference</a> field can't refer its' <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/servic/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/servic">@servic</a>… (<a href="https://github.com/apache/dubbo/pull/4385" data-hovercard-type="pull_request" data-hovercard-url="/apache/dubbo/pull/4385/hovercard">#4385</a>)</li>
<li>Observation of performance degradation when running under JDK 8 (<a href="https://github.com/apache/dubbo/pull/4381" data-hovercard-type="pull_request" data-hovercard-url="/apache/dubbo/pull/4381/hovercard">#4381</a>)</li>
<li>duplicate decrease for ExecuteLimitFilter onError (<a href="https://github.com/apache/dubbo/pull/4380" data-hovercard-type="pull_request" data-hovercard-url="/apache/dubbo/pull/4380/hovercard">#4380</a>)</li>
<li>AsyncRpcResult should handle exception when registering callback. (<a href="https://github.com/apache/dubbo/pull/4379" data-hovercard-type="pull_request" data-hovercard-url="/apache/dubbo/pull/4379/hovercard">#4379</a>)</li>
<li>fix qos configuration cannot work. <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="459770312" data-permission-text="Title is private" data-url="https://github.com/apache/dubbo/issues/4377" data-hovercard-type="issue" data-hovercard-url="/apache/dubbo/issues/4377/hovercard" href="https://github.com/apache/dubbo/issues/4377">#4377</a> (<a href="https://github.com/apache/dubbo/pull/4378" data-hovercard-type="pull_request" data-hovercard-url="/apache/dubbo/pull/4378/hovercard">#4378</a>)</li>
<li>format file: pom.xml of bom module (<a href="https://github.com/apache/dubbo/pull/4376" data-hovercard-type="pull_request" data-hovercard-url="/apache/dubbo/pull/4376/hovercard">#4376</a>)</li>
<li>Spring package scan compatibility, support both alibaba Service and apache Service. (<a href="https://github.com/apache/dubbo/pull/4375" data-hovercard-type="pull_request" data-hovercard-url="/apache/dubbo/pull/4375/hovercard">#4375</a>)</li>
<li>[Dubbo-4370]  Add more data to serviceMetaData (<a href="https://github.com/apache/dubbo/pull/4372" data-hovercard-type="pull_request" data-hovercard-url="/apache/dubbo/pull/4372/hovercard">#4372</a>)</li>
<li>fix zipkin compatible. <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="424803743" data-permission-text="Title is private" data-url="https://github.com/apache/dubbo/issues/3728" data-hovercard-type="issue" data-hovercard-url="/apache/dubbo/issues/3728/hovercard" href="https://github.com/apache/dubbo/issues/3728">#3728</a> (<a href="https://github.com/apache/dubbo/pull/4368" data-hovercard-type="pull_request" data-hovercard-url="/apache/dubbo/pull/4368/hovercard">#4368</a>)</li>
<li>unify metadata and configcenter implementations (<a href="https://github.com/apache/dubbo/pull/4360" data-hovercard-type="pull_request" data-hovercard-url="/apache/dubbo/pull/4360/hovercard">#4360</a>)</li>
<li>fix empty protocol in consul registry. <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="455507082" data-permission-text="Title is private" data-url="https://github.com/apache/dubbo/issues/4294" data-hovercard-type="issue" data-hovercard-url="/apache/dubbo/issues/4294/hovercard" href="https://github.com/apache/dubbo/issues/4294">#4294</a> (<a href="https://github.com/apache/dubbo/pull/4354" data-hovercard-type="pull_request" data-hovercard-url="/apache/dubbo/pull/4354/hovercard">#4354</a>)</li>
<li>fix empty protocol for nacos. <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="455507082" data-permission-text="Title is private" data-url="https://github.com/apache/dubbo/issues/4294" data-hovercard-type="issue" data-hovercard-url="/apache/dubbo/issues/4294/hovercard" href="https://github.com/apache/dubbo/issues/4294">#4294</a>. (<a href="https://github.com/apache/dubbo/pull/4349" data-hovercard-type="pull_request" data-hovercard-url="/apache/dubbo/pull/4349/hovercard">#4349</a>)</li>
<li>synchronized local variables or parameters should be set to final (<a href="https://github.com/apache/dubbo/pull/4325" data-hovercard-type="pull_request" data-hovercard-url="/apache/dubbo/pull/4325/hovercard">#4325</a>)</li>
<li>fix bug about nacos (<a href="https://github.com/apache/dubbo/pull/4308" data-hovercard-type="pull_request" data-hovercard-url="/apache/dubbo/pull/4308/hovercard">#4308</a>)</li>
<li>[Dubbo-4299]Fix NPE when PojoUtils realize Null element in collection(<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="455689002" data-permission-text="Title is private" data-url="https://github.com/apache/dubbo/issues/4299" data-hovercard-type="issue" data-hovercard-url="/apache/dubbo/issues/4299/hovercard" href="https://github.com/apache/dubbo/issues/4299">#4299</a>) (<a href="https://github.com/apache/dubbo/pull/4300" data-hovercard-type="pull_request" data-hovercard-url="/apache/dubbo/pull/4300/hovercard">#4300</a>)</li>
<li>allow <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/service/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/service">@service</a> and <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/reference/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/reference">@reference</a> to merge attributes form annotations in lower levels of the annotation hierachy. (<a href="https://github.com/apache/dubbo/pull/4078" data-hovercard-type="pull_request" data-hovercard-url="/apache/dubbo/pull/4078/hovercard">#4078</a>)</li>
<li>[No issue] Fix: <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/method/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/method">@method</a> default value will be set to the field of MethodConfig  (<a href="https://github.com/apache/dubbo/pull/3642" data-hovercard-type="pull_request" data-hovercard-url="/apache/dubbo/pull/3642/hovercard">#3642</a>)</li>
</ul>
<h2 dir="auto">Code Review Statistics</h2>
<p dir="auto">Dubbo encourages everyone to participant in code review, in order to improve software quality. Every week <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/dubbo-bot/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/dubbo-bot">@dubbo-bot</a> would automatically help to count pull request reviews of single github user as the following. So, try to help review code in this project.</p>
<table role="table">
<thead>
<tr>
<th align="center">Contributor ID</th>
<th align="center">Pull Request Reviews</th>
</tr>
</thead>
<tbody>
<tr>
<td align="center"><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/ralf0131/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/ralf0131">@ralf0131</a></td>
<td align="center">8</td>
</tr>
<tr>
<td align="center"><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/cvictory/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/cvictory">@cvictory</a></td>
<td align="center">7</td>
</tr>
<tr>
<td align="center"><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/danielamorais/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/danielamorais">@danielamorais</a></td>
<td align="center">6</td>
</tr>
<tr>
<td align="center"><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/chickenlj/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/chickenlj">@chickenlj</a></td>
<td align="center">4</td>
</tr>
<tr>
<td align="center"><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/zonghaishang/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/zonghaishang">@zonghaishang</a></td>
<td align="center">3</td>
</tr>
<tr>
<td align="center"><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/Leishunyu/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/Leishunyu">@Leishunyu</a></td>
<td align="center">2</td>
</tr>
<tr>
<td align="center"><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/nullcodeexecutor/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/nullcodeexecutor">@nullcodeexecutor</a></td>
<td align="center">1</td>
</tr>
<tr>
<td align="center"><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/moriadry/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/moriadry">@moriadry</a></td>
<td align="center">1</td>
</tr>
<tr>
<td align="center">@Braavos96</td>
<td align="center">1</td>
</tr>
<tr>
<td align="center"><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/rolandhe/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/rolandhe">@rolandhe</a></td>
<td align="center">1</td>
</tr>
<tr>
<td align="center"><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/owen200008/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/owen200008">@owen200008</a></td>
<td align="center">1</td>
</tr>
<tr>
<td align="center"><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/zhaixiaoxiang/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/zhaixiaoxiang">@zhaixiaoxiang</a></td>
<td align="center">1</td>
</tr>
<tr>
<td align="center"><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/guohao/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/guohao">@guohao</a></td>
<td align="center">1</td>
</tr>
<tr>
<td align="center"><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/CrazyHZM/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/CrazyHZM">@CrazyHZM</a></td>
<td align="center">1</td>
</tr>
<tr>
<td align="center"><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/dhchao11/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/dhchao11">@dhchao11</a></td>
<td align="center">1</td>
</tr>
<tr>
<td align="center"><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/mercyblitz/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/mercyblitz">@mercyblitz</a></td>
<td align="center">1</td>
</tr>
</tbody>
</table>
<h2 dir="auto">Contributors Overview</h2>
<p dir="auto">It is Dubbo team's great honor to have new contributors from community. We really appreciate your contributions. Feel free to tell us if you have any opinion and please share this open source project with more people if you could. If you hope to be a contributor as well, please start from <a href="https://github.com/apache/incubator-dubbo/blob/master/CONTRIBUTING.md">https://github.com/apache/incubator-dubbo/blob/master/CONTRIBUTING.md</a> .<br>
Here is the list of new contributors:</p>
<p dir="auto"><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/RojerAlone/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/RojerAlone">@RojerAlone</a></p>
<p dir="auto"><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/dhchao11/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/dhchao11">@dhchao11</a></p>
<p dir="auto"><a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/HzjNeverStop/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/HzjNeverStop">@HzjNeverStop</a></p>
<p dir="auto">Thanks to you all.</p>
<p dir="auto"><em>Note: This robot is supported by <a href="https://github.com/AlibabaDR/Collabobot">Collabobot</a>.</em></p>
<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>Travis</li>
</ul>
<h3 dir="auto">Steps to reproduce this issue</h3>
<ol dir="auto">
<li>Create a PR.</li>
<li>See the build of travis.<br>
see <a href="https://travis-ci.org/github/apache/dubbo/jobs/674706306" rel="nofollow">https://travis-ci.org/github/apache/dubbo/jobs/674706306</a></li>
</ol>
<h3 dir="auto">Expected Result</h3>
<p dir="auto">Passed.</p>
<h3 dir="auto">Actual Result</h3>
<p dir="auto">Failed:</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="[ERROR] testContainer  Time elapsed: 0.127 s  &lt;&lt;&lt; ERROR!
java.lang.IllegalStateException: Recursive update
	at org.apache.dubbo.container.log4j.Log4jContainerTest.testContainer(Log4jContainerTest.java:31)"><pre class="notranslate"><code class="notranslate">[ERROR] testContainer  Time elapsed: 0.127 s  &lt;&lt;&lt; ERROR!
java.lang.IllegalStateException: Recursive update
	at org.apache.dubbo.container.log4j.Log4jContainerTest.testContainer(Log4jContainerTest.java:31)
</code></pre></div>
<p dir="auto">Travis always failed.<br>
But sometimes it will passed after force-pushed without any change.</p>
<p dir="auto">Compare:<br>
<a href="https://travis-ci.org/github/apache/dubbo/jobs/674706306" rel="nofollow">https://travis-ci.org/github/apache/dubbo/jobs/674706306</a><br>
<a href="https://travis-ci.org/github/apache/dubbo/builds/674993938" rel="nofollow">https://travis-ci.org/github/apache/dubbo/builds/674993938</a></p>