title: JMeter construct payload from csv file
body: <p>I needed to construct an HTTP request body from a CSV file.
  There are 3 columns (userID, SessionId, groupId) and 1000 userIDs in the CSV file.
  The API I was testing had a requirement for bulk loading, and each bulk contains 200 userIDs.<br>
  Below is the sample of the payload:</p>
  <pre><code>{
  
    &quot;data&quot;: [
      {
        &quot;username&quot;: &quot;&lt;userID&gt;&quot;,
        &quot;remoteMeetingGroupName&quot;: &quot;&lt;groupID&gt;&quot;
      },
      {
        &quot;username&quot;: &quot;&lt;userID&gt;&quot;,
        &quot;remoteMeetingGroupName&quot;: &quot;&lt;groupID&gt;&quot;
      },
      ...
    ]
  }
  </code></pre>
  <p>So based on the requirement of 200 users per bulk, I will need to create 5 concurrent users, each of while containing 200 users in the CSV file. Is ForEach controller able to do this? Could anyone gimme some hints? Thanks.</p>