title: org.apache.http.ProtocolException: Target host is not specified
body: <p>I have written a simple httprequest/response code and I am getting this below error. I have referenced httpclient, httpcore, common-codecs and common-logging in my classpath. I am very new to java and have no clue what is going on here. Please help me. </p>
  
  <p>Code:</p>
  
  <pre><code>import org.apache.http.client.HttpClient;
  import org.apache.http.client.methods.HttpGet;
  import org.apache.http.HttpResponse;
  import org.apache.http.impl.client.HttpClientBuilder;
  import org.apache.http.Header;
  import org.apache.http.HttpHeaders;
  
  public class UnshorteningUrl {
  
      public static void main(String[] args) throws Exception
      {           
          HttpGet request=null;
          HttpClient client = HttpClientBuilder.create().build();         
  
          try {
              request = new HttpGet("trib.me/1lBFzSi");
              HttpResponse httpResponse=client.execute(request);
  
              Header[] headers = httpResponse.getHeaders(HttpHeaders.LOCATION);
             // Preconditions.checkState(headers.length == 1);
              String newUrl = headers[0].getValue();          
              System.out.println("new url" + newUrl);         
          } catch (IllegalArgumentException e) {
              // TODO: handle exception
          }finally {
              if (request != null) {
                  request.releaseConnection();
              }           
          }
      }}
  </code></pre>
  
  <p>Error:</p>
  
  <pre><code>Exception in thread "main" org.apache.http.client.ClientProtocolException
      at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:186)
      at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
      at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:106)
      at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:57)
      at UnshorteningUrl.main(UnshorteningUrl.java:26)
  Caused by: org.apache.http.ProtocolException: Target host is not specified
      at org.apache.http.impl.conn.DefaultRoutePlanner.determineRoute(DefaultRoutePlanner.java:69)
      at org.apache.http.impl.client.InternalHttpClient.determineRoute(InternalHttpClient.java:124)
      at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:183)
      ... 4 more
  </code></pre>