title: AWS DMS Error when trying to replicate Oracle to PostgreSQL
body: <p>I'm trying to replicate several schemas in a Oracle database to a PostgresSQL database. 
  When the DMS task is started with <strong>Full load, ongoing replication</strong> type the task fails after sometimes while the tables are in the <strong>Before Load</strong> status. This is the error I'm getting when the task fails</p>
  
  <pre><code>Last Error Task error notification received from subtask 0, thread 0 [reptask/replicationtask.c:2673] [1022301] 
  Oracle CDC stopped; Error executing source loop; Stream component failed at subtask 0, 
  component st_0_LBI2ND3ZI65BF6DQQYK4ITPYAY ; Stream component 'st_0_LBI2ND3ZI65BF6DQQYK4ITPYAY' 
  terminated [reptask/replicationtask.c:2680] [1022301] Stop Reason FATAL_ERROR Error Level FATAL
  </code></pre>
  
  <p>However when the same tables are added to a task with <strong>Full Load</strong> type it works without any issue. The error occurs only when trying to run the task for replicating ongoing changes.
  I tried searching for this error but couldn't find a exact reason. I have configured the endpoints properly and both source and target endpoints have the required permissions for replicating changes. How can I get this resolved?</p>