ocs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block"><p>
 The collectPartitionData method receives control
 periodically during partition processing.
 This method receives control on each thread processing
 a partition as follows:
 </p>
 <ol>
 <li>for a chunk type step, it receives control after
 every chunk checkpoint and then one last time at the
 end of the partition;</li>
 <li>for a batchlet type step, 