适用于Visual Studio的Azure流分析工具：执行聚合查询时出错-“对象引用未设置为对象的实例”

Question

We have followed the documentation Use Azure Stream Analytics tools for Visual Studio and made the Visual Studio capable of creating Azure Stream Analytics project.

We have created an Azure Stream Analytics(ASA) job with Local Input data in the following JSON format:

[
    {
        "Driver": "Lewis",
        "Speed": 0.8275496959686279,
        "Accelerator": 1,
        "Brakes": 0,
        "Steering": 0,
        "ErsBattery": 0.9398990273475647,
        "Gear": 0,
        "LapTimeMs": 107,
        "EventTime": "2016-04-01T00:00:00.107",
        "PosX": 1593.4061279296875,
        "PosY": 934.5406494140625,
        "PosZ": 101.44535064697266
    },
    {
        "Driver": "James",
        "Speed": 1.8795902729034424,
        "Accelerator": 1,
        "Brakes": 0,
        "Steering": 0,
        "ErsBattery": 0.9865896105766296,
        "Gear": 0,
        "LapTimeMs": 107,
        "EventTime": "2016-04-01T00:00:00.107",
        "PosX": 1593.3990478515625,
        "PosY": 934.5374145507812,
        "PosZ": 101.44610595703125
    },
    {
        "Driver": "Damon",
        "Speed": 0.4023849666118622,
        "Accelerator": 1,
        "Brakes": 0,
        "Steering": 0,
        "ErsBattery": 1,
        "Gear": 0,
        "LapTimeMs": 108,
        "EventTime": "2016-04-01T00:00:00.108",
        "PosX": 1593.411865234375,
        "PosY": 934.5435180664062,
        "PosZ": 101.44485473632812
    }
]

Then we are running the query locally as below:

SELECT Driver, AVG(Speed) AS AvgSpeed
FROM Input 
GROUP BY Driver, TumblingWindow(second, 10)

After executing the query, we are getting an error message as " Error : Object reference not set to an instance of an object. "

Answer 1

Open your Visual Studio IDE in Administrator mode, run your ASA query with local input and you will get the expected query result.