title: Host error during request eTicketCouponLLSRQ
body: <p>Sometimes I receive ERR.SWS.HOST.CONNECTOR_ERROR while invoking eTicketCouponLLSRQ and sometimes I receive valid response. What is wrong?
  Thank you!</p>
  
  <p>I'm working in CERT, SRW version is 2.15.2 (SDK version), PCC Z4KB, EPR 1112</p>
  
  <p>RQ:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;&lt;eTicketCouponRQ xmlns="http://webservices.sabre.com/sabreXML/2011/10" TimeStamp="2018-04-23T10:36:18.907" Version="2.0.0"&gt;
      &lt;Ticketing eTicketNumber="5552484960880"/&gt;
  &lt;/eTicketCouponRQ&gt;
  </code></pre>
  
  <p>RS:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;&lt;eTicketCouponRQ xmlns="http://webservices.sabre.com/sabreXML/2011/10" TimeStamp="2018-04-23T10:36:18.907" Version="2.0.0"&gt;
      &lt;Ticketing eTicketNumber="XXXXXXXXX0880"/&gt;
  &lt;/eTicketCouponRQ&gt;&lt;?xml version="1.0" encoding="UTF-8" standalone="no"?&gt;&lt;eTicketCouponRS xmlns="http://webservices.sabre.com/sabreXML/2011/10" xmlns:stl="http://services.sabre.com/STL/v01" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" Version="2.0.0"&gt;
   &lt;stl:ApplicationResults status="Unknown"&gt;
    &lt;stl:Error timeStamp="2018-04-23T01:33:59-05:00" type="Application"&gt;
     &lt;stl:SystemSpecificResults&gt;
      &lt;stl:Message&gt;Sending request to the Host failed&lt;/stl:Message&gt;
      &lt;stl:ShortText&gt;ERR.SWS.HOST.CONNECTOR_ERROR&lt;/stl:ShortText&gt;
     &lt;/stl:SystemSpecificResults&gt;
    &lt;/stl:Error&gt;
   &lt;/stl:ApplicationResults&gt;
  &lt;/eTicketCouponRS&gt;
  </code></pre>