The Solr server could not be reached. Further data is therefore unavailable
<p>I installed solr 5.4.0, enabled modules search_api and search_api_solr on my drupal site. When I'm trying to add search server it's adding but </p>

<blockquote>
  <p>CONNECTION:   The Solr server could not be reached. Further data is
  therefore unavailable.</p>
</blockquote>

<p>The Solr Server URI is(without space)</p>

<blockquote>
  <p>SOLR SERVER URI:  http: //drupal_learning:8983/solr</p>
</blockquote>

<p>But when I'm trying to click that link it sends me to </p>

<blockquote>
  <p><a href="http://drupal_learning:8983/solr/#overlay-context=" rel="nofollow">http://drupal_learning:8983/solr/#overlay-context=</a></p>
</blockquote>

<p>And browser gives me an error: </p>

<blockquote>
  <p>404 Not Found Get #overlay-context=</p>
</blockquote>

<p>But if I try to go to <a href="http://drupal_learning:8983/solr" rel="nofollow">http://drupal_learning:8983/solr</a> by typing it in addressline it's OK.
Do I need to change somehow Solr Server URI or do smth else?</p>