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CUTR-at-USF / bullrunner-gtfs-realtime-generator

Desktop application that retrieves AVL data from the USF Bull Runner's AVL system and produces Trip Updates and Vehicle Positions files in GTFS-realtime format.
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Empty response from Syncromatics API #27

Closed minhhpham closed 6 years ago

minhhpham commented 6 years ago

In the method downloadVehiclesRouteC, we send a request to Syncromatics API for arrival prediction by vehicle. The response contains pattern name for the given vehicle and this helps us distinguish route C's vehicles from MSC Express' vehicles. However, the response is sometimes empty and causes the following bug:

2018-09-18 12:24:49,561 WARN  [GtfsRealtimeProviderImpl.java:442] : Error in vehicle refresh task
org.json.JSONException: JSONArray[0] not found.
    at org.json.JSONArray.get(JSONArray.java:234)
    at org.json.JSONArray.getJSONObject(JSONArray.java:326)
    at edu.usf.cutr.gtfs_realtime.bullrunner.GtfsRealtimeProviderImpl.downloadVehiclesRouteC(GtfsRealtimeProviderImpl.java:395)
    at edu.usf.cutr.gtfs_realtime.bullrunner.GtfsRealtimeProviderImpl.refreshTripVehicle(GtfsRealtimeProviderImpl.java:216)
    at edu.usf.cutr.gtfs_realtime.bullrunner.GtfsRealtimeProviderImpl.access$200(GtfsRealtimeProviderImpl.java:60)
    at edu.usf.cutr.gtfs_realtime.bullrunner.GtfsRealtimeProviderImpl$VehiclesRefreshTask.run(GtfsRealtimeProviderImpl.java:440)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
barbeau commented 6 years ago

Note that this currently relates to the update-syncromatics-api branch, which isn't yet merged into master but is under development in https://github.com/CUTR-at-USF/bullrunner-gtfs-realtime-generator/pull/26.