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Cisco Bug: CSCte15558 - Router may assert while handling Abandon event report for re-queried Cal

Last Modified

Dec 29, 2016

Products (1)

  • Cisco Unified Contact Center Enterprise

Known Affected Releases

7.0(0) 7.1(1) 7.2(1) 7.2(6) 7.5(1) 8.0(1)

Description (partial)

Only one side of the Router process crashes with the following call stack:

Call stack:
Address   Frame
0041900C  0012ED80  Call_Data::HandleRequeryEventReport+49C
0041A445  0012EE14  Call_Data::HandleCallEventReport+1A5
004A4661  0012EE38  SetCallID+C1
004A8168  0012FE58  ProcessINRCMsg+408
00503974  0012FEB0  MDSGetHandle+154
00505CED  0012FEC8  MDSStartClient+2AD
004E04FE  0012FF08  RouterInput::MDSInput+FE
004AAD02  0012FF24  RouterMain::Execute+592
004F09AA  0012FF38  Reader::SingleCommand+CA
004AA635  0012FF60  main+95
0062077E  0012FFC0  mainCRTStartup+143
77E6F23B  0012FFF0  ProcessIdToSessionId+209

The reason why only one side of the Router crashes, and the fact that the issue is sporadic (Router doesn't crash always for Customer, even though the same call flow executes periodically - "Customer Aborts call after Router picks Agent with Re-query enabled"), points to a rare condition where the OS cleans up the deleted memory location, in between the processing of the Call Event Report of "REQUERY_ABORTED" (5) from CVP. Ideally, there should never have been an attempt to access the deleted memory location.
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