Azure Function运行报错The application could not be found，求排查帮助

架构老林

2026-7-14

Azure Function调用Application Insights API时返回ApplicationNotFoundError

运行Azure Function时遇到以下错误：

{"error":{"message":"The application could not be found","code":"ApplicationNotFoundError","correlationId":"blabla-blabla-bla-blablablabla"}}

我的Function代码：

[FunctionName("GetOperationData")]
public static async Task<IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = null)] HttpRequest req,
ILogger log)
{
    log.LogInformation("C# HTTP trigger function processed a request.");

    string id = req.Query["id"];

    var applicationInsightsAppId = "blablabla-blablaba-blabla-blablalbla";
    var apiKey = "thisIsMySecret";

    httpClient.DefaultRequestHeaders.Add("x-api-key", apiKey);

    var query = $@" requests
        | where id == '{id}'
        | join kind=inner (exceptions) on operation_Id
        | join kind=inner (dependencies) on operation_Id
        | join kind=inner (traces) on operation_Id
        | project id, name, url, success, resultCode,
                  operation_Name, operation_Id, client_Type,
                  client_IP, client_City, client_StateOrProvince";


    var content = new StringContent(JsonConvert.SerializeObject(new { query = query }),
        Encoding.UTF8, "application/json");

    var response = await httpClient.PostAsync($"https://api.applicationinsights.io/v1/apps/{applicationInsightsAppId}/query"
        , content);

    var responseString = await response.Content.ReadAsStringAsync();
    return new OkObjectResult(responseString);
}