The criteria for Request Discard in LoadUI

Hi,

I'm using LoadUI 2.0.0 version, during my load run over SOAP request, I observed the following output data in SoapUI Runner component.

Request 66487
Completed 66487
Failed 0
Discarded 1266708

So could you please let me know, why the request Discarded rate is so high i.e what's the criteria in LoadUI to discard a request ? Is this an issue with the SUT (server under test) that causes the request discard rate high ? But I didn't observe any Error/Exception in my server (SUT) log.

Please suggest how to find out the root cause for high Request Discard Rate?

Thank You.

Regards,
Anand