Infolog in batch task history using SysOperation framework

If you add tasks to a batch job using SysOperation framework, like the following:

[...]

while (mapIterator.more())
    {
        if (!batchHeader)
        {
            batchHeader = this.getCurrentBatchHeader();
        }

        controller = wblDirPartyMergeTaskController::construct();

        [...]

        if (batchHeader)
        {
            batchInfo = controller.batchInfo();
            batchHeader.addRuntimeTask(controller, this.getCurrentBatchTask().RecId);
        }
        else
        {
            setPrefix(batchInfoStr);
            controller.parmExecutionMode(SysOperationExecutionMode::Synchronous);
            controller.run();
        }
      
        mapIterator.next();
    }

    if (batchHeader)
    {
        batchHeader.save();
    }
}

You need to set Execution mode to Synchronous while initializing your service class controller.

// class wblDirPartyMergeTaskController extends SysOperationServiceController
public void new()
{
    super();
    // default for controllers in these classes is synchronous execution
    // batch execution will be explicitly specified. The default for
    // SysOperationServiceController is ReliableAsynchronous execution
    this.parmExecutionMode(SysOperationExecutionMode::Synchronous);

    this.parmOther(newValue);
}
      

Otherwise you will see nothing in bath tasks history infolog.