Kalman error value being calculated as NaN

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Kalman error value being calculated as NaN resulting in a 0 prediction for the stoppath. See bold items on log below. Will set to default error value if NaN encountered.

18:51:15.234 Generating Kalman prediction for : Indices [blockId=5, tripId=5, tripIndex=0, stopPathIndex=11, segmentIndex=0]

18:51:15.234 Kalman is using historical value : TravelTimeDetails [departure=Departure [vehicleId=1119, time=10-09-2018 12:41:37.582 EST, route=C, rteName=C, directionId=1, stop=122, gtfsStopSeq=11, stopIdx=10, freqStartTime=Tue Oct 09 13:59:59 EDT 2018, stopOrder=10, avlTime=12:42:23.000 EST, trip=5, tripIdx=0, block=5, srv=Mo, cfg=0, pathLnth=163.05m], arrival=Arrival [vehicleId=1119, time=10-09-2018 12:42:10.985 EST, route=C, rteName=C, directionId=1, stop=120, gtfsStopSeq=12, stopIdx=11, freqStartTime=Tue Oct 09 13:59:59 EDT 2018, stopOrder=11, avlTime=12:42:23.000 EST, trip=5, tripIdx=0, block=5, srv=Mo, cfg=0, pathLnth=100.80m], getTravelTime()=33403, sanityCheck()=true] for : Indices [blockId=5, tripId=5, tripIndex=0, stopPathIndex=11, segmentIndex=0]

18:51:15.234 Kalman is using historical value : TravelTimeDetails [departure=Departure [vehicleId=1701, time=10-08-2018 12:37:36.742 EST, route=C, rteName=C, directionId=1, stop=122, gtfsStopSeq=11, stopIdx=10, freqStartTime=Mon Oct 08 13:55:14 EDT 2018, stopOrder=10, avlTime=12:38:00.000 EST, trip=5, tripIdx=0, block=5, srv=Mo, cfg=0, pathLnth=163.05m], arrival=Arrival [vehicleId=1701, time=10-08-2018 12:38:05.741 EST, route=C, rteName=C, directionId=1, stop=120, gtfsStopSeq=12, stopIdx=11, freqStartTime=Mon Oct 08 13:55:14 EDT 2018, stopOrder=11, avlTime=12:38:00.000 EST, trip=5, tripIdx=0, block=5, srv=Mo, cfg=0, pathLnth=100.80m], getTravelTime()=28999, sanityCheck()=true] for : Indices [blockId=5, tripId=5, tripIndex=0, stopPathIndex=11, segmentIndex=0]

18:51:15.234 Kalman is using historical value : TravelTimeDetails [departure=Departure [vehicleId=1120, time=09-25-2018 12:16:09.981 EST, route=C, rteName=C, directionId=null, stop=122, gtfsStopSeq=11, stopIdx=10, freqStartTime=2018-09-25 13:31:23.776, stopOrder=-1, avlTime=12:16:31.000 EST, trip=5, tripIdx=0, block=5, srv=Mo, cfg=0, pathLnth=163.05m], arrival=Arrival [vehicleId=1120, time=09-25-2018 12:16:38.980 EST, route=C, rteName=C, directionId=null, stop=120, gtfsStopSeq=12, stopIdx=11, freqStartTime=2018-09-25 13:31:23.776, stopOrder=-1, avlTime=12:16:31.000 EST, trip=5, tripIdx=0, block=5, srv=Mo, cfg=0, pathLnth=100.80m], getTravelTime()=28999, sanityCheck()=true] for : Indices [blockId=5, tripId=5, tripIndex=0, stopPathIndex=11, segmentIndex=0]

18:51:15.234 Kalman is using historical value : TravelTimeDetails [departure=Departure [vehicleId=1120, time=09-19-2018 12:39:02.236 EST, route=C, rteName=C, directionId=null, stop=122, gtfsStopSeq=11, stopIdx=10, freqStartTime=2018-09-19 13:59:16.222, stopOrder=-1, avlTime=12:39:05.774 EST, trip=5, tripIdx=0, block=5, srv=Mo, cfg=0, pathLnth=163.05m], arrival=Arrival [vehicleId=1120, time=09-19-2018 12:39:09.916 EST, route=C, rteName=C, directionId=null, stop=120, gtfsStopSeq=12, stopIdx=11, freqStartTime=2018-09-19 13:59:16.222, stopOrder=-1, avlTime=12:39:05.774 EST, trip=5, tripIdx=0, block=5, srv=Mo, cfg=0, pathLnth=100.80m], getTravelTime()=7680, sanityCheck()=true] for : Indices [blockId=5, tripId=5, tripIndex=0, stopPathIndex=11, segmentIndex=0]

18:51:15.234 Kalman is using historical value : TravelTimeDetails [departure=Departure [vehicleId=1701, time=09-17-2018 12:33:54.863 EST, route=C, rteName=C, directionId=null, stop=122, gtfsStopSeq=11, stopIdx=10, freqStartTime=2018-09-17 13:53:04.591, stopOrder=-1, avlTime=12:34:04.074 EST, trip=5, tripIdx=0, block=5, srv=Mo, cfg=0, pathLnth=163.05m], arrival=Arrival [vehicleId=1701, time=09-17-2018 12:34:03.709 EST, route=C, rteName=C, directionId=null, stop=120, gtfsStopSeq=12, stopIdx=11, freqStartTime=2018-09-17 13:53:04.591, stopOrder=-1, avlTime=12:34:04.074 EST, trip=5, tripIdx=0, block=5, srv=Mo, cfg=0, pathLnth=100.80m], getTravelTime()=8846, sanityCheck()=true] for : Indices [blockId=5, tripId=5, tripIndex=0, stopPathIndex=11, segmentIndex=0]

18:51:15.234 Kalman Error value : NaN for key: KalmanErrorCacheKey [tripId=5, stopPathIndex=11]

18:51:15.234 Using error value: NaN found with vehicle id 1119 from: KalmanErrorCacheKey [tripId=5, stopPathIndex=11]

18:51:15.234 Using last vehicle value: TravelTimeDetails [departure=Departure [vehicleId=1119, time=10-11-2018 12:32:46.261 EST, route=C, rteName=C, directionId=1, stop=122, gtfsStopSeq=11, stopIdx=10, freqStartTime=Thu Oct 11 13:50:23 EDT 2018, stopOrder=10, avlTime=12:33:06.000 EST, trip=5, tripIdx=0, block=5, srv=Mo, cfg=0, pathLnth=163.05m], arrival=Arrival [vehicleId=1119, time=10-11-2018 12:33:15.260 EST, route=C, rteName=C, directionId=1, stop=120, gtfsStopSeq=12, stopIdx=11, freqStartTime=Thu Oct 11 13:50:23 EDT 2018, stopOrder=11, avlTime=12:33:06.000 EST, trip=5, tripIdx=0, block=5, srv=Mo, cfg=0, pathLnth=100.80m], getTravelTime()=28999, sanityCheck()=true] for : Indices [blockId=5, tripId=5, tripIndex=0, stopPathIndex=11, segmentIndex=0]

18:51:15.234 Setting Kalman error value: NaN for : KalmanErrorCacheKey [tripId=5, stopPathIndex=11]

18:51:15.234 Using last vehicle algorithm for prediction : TravelTimeDetails [departure=Departure [vehicleId=1119, time=10-11-2018 12:32:46.261 EST, route=C, rteName=C, directionId=1, stop=122, gtfsStopSeq=11, stopIdx=10, freqStartTime=Thu Oct 11 13:50:23 EDT 2018, stopOrder=10, avlTime=12:33:06.000 EST, trip=5, tripIdx=0, block=5, srv=Mo, cfg=0, pathLnth=163.05m], arrival=Arrival [vehicleId=1119, time=10-11-2018 12:33:15.260 EST, route=C, rteName=C, directionId=1, stop=120, gtfsStopSeq=12, stopIdx=11, freqStartTime=Thu Oct 11 13:50:23 EDT 2018, stopOrder=11, avlTime=12:33:06.000 EST, trip=5, tripIdx=0, block=5, srv=Mo, cfg=0, pathLnth=100.80m], getTravelTime()=28999, sanityCheck()=true] for : Indices [blockId=5, tripId=5, tripIndex=0, stopPathIndex=11, segmentIndex=0]

18:51:15.234 Using Kalman prediction: 0 instead of LastVehiclePredictionGeneratorImpl prediction: 28999 for : Indices [blockId=5, tripId=5, tripIndex=0, stopPathIndex=11, segmentIndex=0]

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Fixed in tc_issue_80.