Can Somebody Help me out with this SOAP Error description

#Software: Microsoft Internet Information Services 10.0
#Version: 1.0
#Date: 2021-01-27 10:55:01
#Fields: date time s-ip cs-method cs-uri-stem cs-uri-query s-port cs-username c-ip cs(User-Agent) cs(Referer) sc-status sc-substatus sc-win32-status time-taken

2021-01-27 10:55:02 192.168.1.1 POST /Honeywell/WebServices/WebDataAccess.asp +SOAP+ERROR:+SoapServer.SoapInvoke+failed.+WSDLOperation:Executing+method+ReadRequest+failed+HRESULT=0x80020009 80 PCNGATE\BizTalk 192.168.1.15 - - 500 0 0 296

Question: Here we are sending a SOAP message from a SOAP client to a Webserver requesting for some data.The name of the soap method we call on the web server is "Readrequest" this method returns a good value most of the time but sometimes we get the error as shown above with server error code 500 and HResult 0x80020009 .Can it be because we are bulk requesting everything at once?