Azure 函数：值不能为空。参数名称：来源

最近，当我调用 Azure 函数时，每当我尝试向 AddGroup 函数发出 HTTP 请求时，就会看到此异常。

• 它曾经有效，直到我更新了一些 NuGet 包（特别是 Newtonsoft JSON 11.0.2）
• 当我在本地运行该函数时它工作正常 - 这与 Azure 有关
• 我已经多次推送新代码并重新启动该功能
• 这里的其他问题说这可能是连接字符串问题，但是，它再次在我的本地计算机上运行，​​并且我没有触及连接字符串
• 当我尝试连接云调试器时，异常会在遇到代码中的任何断点之前出现。

有任何想法吗？

Time 11:04:02 AM
Exception type Microsoft.Azure.WebJobs.Host.FunctionInvocationException
Exception message Exception while executing function: AddGroup <--- Value cannot be null. Parameter name: source
Host.Results
Microsoft.Azure.WebJobs.Host.FunctionInvocationException: Exception while executing function: AddGroup ---> System.ArgumentNullException: Value cannot be null.

Parameter name: source

   at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.FunctionInvocationFilterInvoker.<InvokeAsync>d__9.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.<InvokeAsync>d__24.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.<ExecuteWithWatchersAsync>d__23.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.<ExecuteWithLoggingAsync>d__22.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)

   at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.<ExecuteWithLoggingAsync>d__16.MoveNext()

   --- End of inner exception stack trace ---

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

   at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.<ExecuteWithLoggingAsync>d__16.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.<TryExecuteAsync>d__13.MoveNext()

我发现了 - 我遇到了 NuGet 包冲突。我的一个项目试图引用 Newtonsoft Json 9.0.1 版本（Azure Functions SDK 所依赖的版本）以及另一个项目想要的 11.0.2 版本。我最终让其他项目也使用该包的 9.0.1 版本。