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         <h1 class="page-header" style="margin-top: 0px">Frequently Asked Questions</h1>
         <ul>
   <li>
     <p><strong>Q1. Not able to access storm worker log via browser</strong></p>

     <blockquote>
       <p>Add the following line in host machine’s hosts file</p>
     </blockquote>

     <div class="highlighter-rouge"><pre class="highlight"><code>127.0.0.1 sandbox.hortonworks.com
 </code></pre>
     </div>
   </li>
   <li>
     <p><strong>Q2. Not able to send data into kafka using kafka console producer</strong>:</p>

     <div class="highlighter-rouge"><pre class="highlight"><code>/usr/hdp/current/kafka-broker/bin/kafka-console-producer.sh --broker-list localhost:6667 --topic sandbox_hdfs_audit_log
 </code></pre>
     </div>

     <blockquote>
       <p>Apache Kafka broker are binding to host sandbox.hortonworks.com</p>
     </blockquote>
   </li>
   <li>
     <p><strong>Q3. Cannot visit eagle service url http://localhost:9099 through the browser</strong></p>

     <blockquote>
       <p>If your network is NAT, then you need to add forwarding port 9099 for eagle service, or you should check if Apache HBase is alive.</p>
     </blockquote>
   </li>
   <li>
     <p><strong>Q4: There is no data in Kafka topic after installing log4j Kafka appender</strong></p>

     <blockquote>
       <p>There are a few reasons for this: 1) check if the log4j kafka appender is installed successfully and there is no exceptions when restarting the namenode. 2) check if Apache Kafka is started. 3) If everything is ok, the final choice is to restart the namenode again.</p>
     </blockquote>
   </li>
   <li>
     <p><strong>Q5: There is no workers in some topologies.</strong></p>

     <blockquote>
       <p>Apache Storm in sandbox has only two slots (workers) to run topologies by default. If want to run more than two topologies, a user should add extra slots in the configurations and restart Storm.</p>
     </blockquote>

     <p><img src="/images/docs/storm-slot.png" alt="Add slots" /></p>
   </li>
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	<h1 class="page-header" style="margin-top: 0px">Frequently Asked Questions</h1>
	<ul>
	<li>
	<p><strong>Q1. Not able to access storm worker log via browser</strong></p>

	<blockquote>
	<p>Add the following line in host machine’s hosts file</p>
	</blockquote>

	<div class="highlighter-rouge"><pre class="highlight"><code>127.0.0.1 sandbox.hortonworks.com
	</code></pre>
	</div>
	</li>
	<li>
	<p><strong>Q2. Not able to send data into kafka using kafka console producer</strong>:</p>

	<div class="highlighter-rouge"><pre class="highlight"><code>/usr/hdp/current/kafka-broker/bin/kafka-console-producer.sh --broker-list localhost:6667 --topic sandbox_hdfs_audit_log
	</code></pre>
	</div>

	<blockquote>
	<p>Apache Kafka broker are binding to host sandbox.hortonworks.com</p>
	</blockquote>
	</li>
	<li>
	<p><strong>Q3. Cannot visit eagle service url http://localhost:9099 through the browser</strong></p>

	<blockquote>
	<p>If your network is NAT, then you need to add forwarding port 9099 for eagle service, or you should check if Apache HBase is alive.</p>
	</blockquote>
	</li>
	<li>
	<p><strong>Q4: There is no data in Kafka topic after installing log4j Kafka appender</strong></p>

	<blockquote>
	<p>There are a few reasons for this: 1) check if the log4j kafka appender is installed successfully and there is no exceptions when restarting the namenode. 2) check if Apache Kafka is started. 3) If everything is ok, the final choice is to restart the namenode again.</p>
	</blockquote>
	</li>
	<li>
	<p><strong>Q5: There is no workers in some topologies.</strong></p>

	<blockquote>
	<p>Apache Storm in sandbox has only two slots (workers) to run topologies by default. If want to run more than two topologies, a user should add extra slots in the configurations and restart Storm.</p>
	</blockquote>

	<p><img src="/images/docs/storm-slot.png" alt="Add slots" /></p>
	</li>
	</ul>


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	Apache Eagle, Eagle, Apache Hadoop, Hadoop, Apache HBase, HBase, Apache Hive, Hive, Apache Ambari, Ambari, Apache Spark, Spark, Apache Kafka, Kafka, Apache Storm, Storm, Apache Maven, Maven, Apache Tomcat, Tomcat, Apache Derby, Derby, Apache Cassandra, Cassandra, Apache ZooKeeper, ZooKeeper, Apache, the Apache feather logo, and the Apache project logo are trademarks of The Apache Software Foundation.
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