<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/incubator-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/incubator-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: 2.7.0+</li>
<li>Java version: 1.8</li>
</ul>
<h3 dir="auto">Optimize the scene</h3>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="1.  Performance improvement scenario description
2.  Unoptimized benchmark performance
3.  Optimized benchmark performance
4.  Benchmarking tool： https://github.com/dubbo/dubbo-benchmark"><pre class="notranslate"><code class="notranslate">1.  Performance improvement scenario description
2.  Unoptimized benchmark performance
3.  Optimized benchmark performance
4.  Benchmarking tool： https://github.com/dubbo/dubbo-benchmark
</code></pre></div>
<table role="table">
<thead>
<tr>
<th>No</th>
<th>issues</th>
<th>description</th>
<th>status</th>
<th>pull request</th>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td><a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="377316196" data-permission-text="Title is private" data-url="https://github.com/apache/dubbo/issues/2737" data-hovercard-type="issue" data-hovercard-url="/apache/dubbo/issues/2737/hovercard" href="https://github.com/apache/dubbo/issues/2737">#2737</a></td>
<td>epoll</td>
<td>done</td>
<td><a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="377356142" data-permission-text="Title is private" data-url="https://github.com/apache/dubbo/issues/2738" data-hovercard-type="pull_request" data-hovercard-url="/apache/dubbo/pull/2738/hovercard" href="https://github.com/apache/dubbo/pull/2738">#2738</a></td>
</tr>
<tr>
<td>2</td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td>3</td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td>4</td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>
<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/incubator-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/incubator-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>
<p dir="auto">Travis CI build environment</p>
<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">Run build in travis CI from latest master branch</p>
<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">Build should not failed because of dubbo-metadata-report-zookeeper UT. below are current error log while running UT on dubbo-metadata-report-zookeeper</p>
<p dir="auto">Running org.apache.dubbo.metadata.store.zookeeper.ZookeeperMetadataReportTest<br>
log4j:WARN No appenders could be found for logger (org.apache.dubbo.common.logger.LoggerFactory).<br>
log4j:WARN Please initialize the log4j system properly.<br>
log4j:WARN See <a href="http://logging.apache.org/log4j/1.2/faq.html#noconfig" rel="nofollow">http://logging.apache.org/log4j/1.2/faq.html#noconfig</a> for more info.<br>
Tests run: 2, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 4.305 sec &lt;&lt;&lt; FAILURE! - in org.apache.dubbo.metadata.store.zookeeper.ZookeeperMetadataReportTest<br>
testStoreProvider(org.apache.dubbo.metadata.store.zookeeper.ZookeeperMetadataReportTest)  Time elapsed: 2.461 sec  &lt;&lt;&lt; FAILURE!<br>
java.lang.AssertionError<br>
at org.apache.dubbo.metadata.store.zookeeper.ZookeeperMetadataReportTest.testStoreProvider(ZookeeperMetadataReportTest.java:59)</p>
<p dir="auto">Results :</p>
<p dir="auto">Failed tests:<br>
ZookeeperMetadataReportTest.testStoreProvider:59</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="[�[1;31mERROR�[m] Failed to execute goal �[32morg.apache.maven.plugins:maven-surefire-plugin:2.19.1:test�[m �[1m(default-test)�[m on project �[36mdubbo-metadata-report-zookeeper�[m: �[1;31mThere are test failures.�[m
[�[1;31mERROR�[m] �[1;31m�[m
[�[1;31mERROR�[m] �[1;31mPlease refer to /home/travis/build/apache/incubator-dubbo/dubbo-metadata-report/dubbo-metadata-report-zookeeper/target/surefire-reports for the individual test results.�[m
[�[1;31mERROR�[m] -&gt; �[1m[Help 1]�[m
[�[1;31mERROR�[m] 
[�[1;31mERROR�[m] To see the full stack trace of the errors, re-run Maven with the �[1m-e�[m switch.
[�[1;31mERROR�[m] Re-run Maven using the �[1m-X�[m switch to enable full debug logging.
[�[1;31mERROR�[m] 
[�[1;31mERROR�[m] For more information about the errors and possible solutions, please read the following articles:
[�[1;31mERROR�[m] �[1m[Help 1]�[m http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[�[1;31mERROR�[m] 
[�[1;31mERROR�[m] After correcting the problems, you can resume the build with the command
[�[1;31mERROR�[m]   �[1mmvn &lt;goals&gt; -rf :dubbo-metadata-report-zookeeper�[m
/home/travis/.travis/job_stages: line 523:  4690 Terminated              travis_jigger &quot;${!}&quot; &quot;${timeout}&quot; &quot;${cmd[@]}&quot;"><pre class="notranslate"><code class="notranslate">[�[1;31mERROR�[m] Failed to execute goal �[32morg.apache.maven.plugins:maven-surefire-plugin:2.19.1:test�[m �[1m(default-test)�[m on project �[36mdubbo-metadata-report-zookeeper�[m: �[1;31mThere are test failures.�[m
[�[1;31mERROR�[m] �[1;31m�[m
[�[1;31mERROR�[m] �[1;31mPlease refer to /home/travis/build/apache/incubator-dubbo/dubbo-metadata-report/dubbo-metadata-report-zookeeper/target/surefire-reports for the individual test results.�[m
[�[1;31mERROR�[m] -&gt; �[1m[Help 1]�[m
[�[1;31mERROR�[m] 
[�[1;31mERROR�[m] To see the full stack trace of the errors, re-run Maven with the �[1m-e�[m switch.
[�[1;31mERROR�[m] Re-run Maven using the �[1m-X�[m switch to enable full debug logging.
[�[1;31mERROR�[m] 
[�[1;31mERROR�[m] For more information about the errors and possible solutions, please read the following articles:
[�[1;31mERROR�[m] �[1m[Help 1]�[m http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[�[1;31mERROR�[m] 
[�[1;31mERROR�[m] After correcting the problems, you can resume the build with the command
[�[1;31mERROR�[m]   �[1mmvn &lt;goals&gt; -rf :dubbo-metadata-report-zookeeper�[m
/home/travis/.travis/job_stages: line 523:  4690 Terminated              travis_jigger "${!}" "${timeout}" "${cmd[@]}"
</code></pre></div>