title: Greenplum reports "got an out of order request, sequence number is A, expected sequence number is B"
body: <p>When initial request was sent with sequence num 1, I sent post request with data and sequence num 2. </p>
  
  <p>Gpfdist return response with status 400 (invalid request due to wrong sequence number) to this request. </p>
  
  <p>In logs it wrote:</p>
  
  <blockquote>
    <p>got an out of order request, sequence number is 2, expected sequence number is 3904674963453378562. </p>
  </blockquote>
  
  <p>Why expected number is <code>3904674963453378562</code> and not <code>2</code>? What I should do with this problem?</p>