OTT-227 Fixing Panic Issue for Prebid Adapter (#176)

* OTT-227 Fixing Panic Issue for Prebid Adapter

exchange/exchange.go

@@ -438,9 +438,6 @@ func (e *exchange) getAllBids(
 			reqInfo.PbsEntryPoint = bidderRequest.BidderLabels.RType
 			bids, err := e.adapterMap[bidderRequest.BidderCoreName].requestBid(ctx, bidderRequest.BidRequest, bidderRequest.BidderName, adjustmentFactor, conversions, &reqInfo, accountDebugAllowed)
 
-			// Setting bidderCoreName in SeatBid
-			bids.bidderCoreName = bidderRequest.BidderCoreName
-
 			// Add in time reporting
 			elapsed := time.Since(start)
 			brw.adapterBids = bids
@@ -449,6 +446,9 @@ func (e *exchange) getAllBids(
 			ae.ResponseTimeMillis = int(elapsed / time.Millisecond)
 			if bids != nil {
 				ae.HttpCalls = bids.httpCalls
+
+				// Setting bidderCoreName in SeatBid
+				bids.bidderCoreName = bidderRequest.BidderCoreName
 			}
 
 			// Timing statistics
@@ -514,9 +514,19 @@ func (e *exchange) recoverSafely(bidderRequests []BidderRequest,
 					allBidders = sb.String()[:sb.Len()-1]
 				}
 
+				bidderRequestStr := ""
+				if nil != bidderRequest.BidRequest {
+					value, err := json.Marshal(bidderRequest.BidRequest)
+					if nil == err {
+						bidderRequestStr = string(value)
+					} else {
+						bidderRequestStr = err.Error()
+					}
+				}
+
 				glog.Errorf("OpenRTB auction recovered panic from Bidder %s: %v. "+
-					"Account id: %s, All Bidders: %s, Stack trace is: %v",
-					bidderRequest.BidderCoreName, r, bidderRequest.BidderLabels.PubID, allBidders, string(debug.Stack()))
+					"Account id: %s, All Bidders: %s, BidRequest: %s, Stack trace is: %v",
+					bidderRequest.BidderCoreName, r, bidderRequest.BidderLabels.PubID, allBidders, bidderRequestStr, string(debug.Stack()))
 				e.me.RecordAdapterPanic(bidderRequest.BidderLabels)
 				// Let the master request know that there is no data here
 				brw := new(bidResponseWrapper)