如何获取Azure Function部署时Microsoft.Azure.WebJobs空引用错误的具体细节

DevOps 小满

2026-7-14

Azure Functions部署Sequelize依赖时的空引用异常排查问题

我通过Azure DevOps CI/CD以压缩包方式部署Azure Function，代码通常能成功部署，但引入npm依赖Sequelize后，应用启动会触发空引用错误，界面报错如下：
Azure Functions启动错误截图

关于Azure Function的配置详情，可参考StackOverflow上的相关问题。

两次依赖导入失败的案例中，仅当导入Sequelize类时会触发函数故障，且故障重现存在随机性（怀疑和浏览器缓存有关）。Application Insights提供的堆栈跟踪如下：

System.NullReferenceException:

   at Microsoft.Azure.WebJobs.Script.WorkerFunctionMetadataProvider+<GetFunctionMetadataAsync>d__10.MoveNext (Microsoft.Azure.WebJobs.Script, Version=4.23.0.0, Culture=neutral, PublicKeyToken=null: /_/src/WebJobs.Script/Host/WorkerFunctionMetadataProvider.cs:83)

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)

   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)

   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)

   at Microsoft.Azure.WebJobs.Script.WebHost.FunctionMetadataProvider+<GetFunctionMetadataAsync>d__10.MoveNext (Microsoft.Azure.WebJobs.Script, Version=4.23.0.0, Culture=neutral, PublicKeyToken=null: /_/src/WebJobs.Script/Host/FunctionMetadataProvider.cs:45)

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)

   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)

   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)

   at Microsoft.Azure.WebJobs.Script.FunctionMetadataManager.LoadFunctionMetadata (Microsoft.Azure.WebJobs.Script, Version=4.23.0.0, Culture=neutral, PublicKeyToken=null: /_/src/WebJobs.Script/Host/FunctionMetadataManager.cs:145)

   at Microsoft.Azure.WebJobs.Script.FunctionMetadataManager.GetFunctionMetadata (Microsoft.Azure.WebJobs.Script, Version=4.23.0.0, Culture=neutral, PublicKeyToken=null: /_/src/WebJobs.Script/Host/FunctionMetadataManager.cs:89)

   at Microsoft.Azure.WebJobs.Script.ScriptHost.GetFunctionsMetadata (Microsoft.Azure.WebJobs.Script, Version=4.23.0.0, Culture=neutral, PublicKeyToken=null: /_/src/WebJobs.Script/Host/ScriptHost.cs:372)

   at Microsoft.Azure.WebJobs.Script.ScriptHost+<InitializeAsync>d__93.MoveNext (Microsoft.Azure.WebJobs.Script, Version=4.23.0.0, Culture=neutral, PublicKeyToken=null: /_/src/WebJobs.Script/Host/ScriptHost.cs:279)

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)

   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)

   at System.Runtime.CompilerServices.TaskAwaiter.GetResult (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)

   at Microsoft.Azure.WebJobs.Script.ScriptHost+<StartAsyncCore>d__92.MoveNext (Microsoft.Azure.WebJobs.Script, Version=4.23.0.0, Culture=neutral, PublicKeyToken=null: /_/src/WebJobs.Script/Host/ScriptHost.cs:256)

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)

   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)

   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable+ConfiguredTaskAwaiter.GetResult (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)

   at Microsoft.Extensions.Hosting.Internal.Host+<StartAsync>d__12.MoveNext (Microsoft.Extensions.Hosting, Version=6.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60)

   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)

   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)

   at System.Runtime.CompilerServices.TaskAwaiter.GetResult (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)

   at Microsoft.Azure.WebJobs.Script.WebHost.WebJobsScriptHostService+<UnsynchronizedStartHostAsync>d__52.MoveNext (Microsoft.Azure.WebJobs.Script.WebHost, Version=4.23.0.0, Culture=neutral, PublicKeyToken=null: /_/src/WebJobs.Script.WebHost/WebJobsScriptHostService.cs:328)

由于故障重现存在随机性，且无法得知具体哪个变量/属性为空，目前排查陷入僵局，请问如何获取该空引用的具体细节？

内容的提问来源于stack exchange，提问作者Aiden Dipple