Logstash not running
<p>I've a logstash instance, version 2.3.1 which isn't running using the command</p>

<pre><code>sudo service logstash start
</code></pre>

<p>Whenever I run this command, it returns <code>logstash started</code> and after a few moments when I check the status, I find that logstash isn't running. Although, when I start the logstash from <code>opt</code> to get output on the terminal, it runs without any error.</p>

<p>Note that <code>logstash.err</code> and <code>logstash.stdout</code> files are empty and <code>logstash.log</code> file isn't anywhere to be found. I've also set <code>LS_GROUP</code> to <code>adm</code> in <code>init.d</code> which caused the same issue on another instance, but even that doesn't seem to work now. Any help would be appreciated!</p>