[Python] error deep inside logs blobTrigger will not fire

Discussão em 'Python' iniciado por Stack, Maio 21, 2025.

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    I am working on one of the Azure Function which is written in Python and it should get called based on Blob trigger event. However, the trigger is not firing when I am uploading a zip file in a blob container to which azure function is supposed to monitor.

    Following is local.settings.json file -

    { "IsEncrypted": false, "Values":
    {
    "AzureWebJobsStorage": "blob (connection string) that was created when Azure
    function is created",
    "FUNCTIONS_WORKER_RUNTIME": "python",
    "My_STORAGE": "blob (connection string) that function should monitor"
    } }


    Following is function.json file -

    { "scriptFile": "__init__.py", "bindings": [
    {
    "name": "myblob",
    "type": "blobTrigger",
    "direction": "in",
    "path": "mycontainer/{name}",
    "connection": "My_STORAGE"
    } ] }


    Following is my code init.py - (test_func is user defined function to do some business logic)

    def main(myblob: func.InputStream):
    test_func(myblob.name)
    logging.info(f"Python blob trigger function processed blob \n"
    f"Name: {myblob.name}\n"
    f"Blob Size: {myblob.length} bytes")


    This is where i am calling the trigger:

    myblob = func.InputStream
    # azservicebus = func.ServiceBusMessage
    logging.info("############ before func.function_app called")
    func.FunctionApp(http_auth_level=func.AuthLevel.FUNCTION)
    logging.info("############ after func.function_app called")
    app = func.FunctionApp(http_auth_level=func.AuthLevel.FUNCTION)
    logging.info("############ after func.FunctionApp called")
    @app.function_name(name="blob_trigger")

    # @app.route(route="blobTrigger",auth_level=func.AuthLevel.ANONYMOUS)
    @app.blob_trigger(
    arg_name="myblob",
    path="workfiles-original/{name}",
    source="EventGrid",
    connection="AzureWebJobsStorage",
    )

    @app.blob_output(
    arg_name="$return",
    path="workingfiles-processed/"+time_uuid+".edi",
    connection="AzureWebJobsStorage"
    )

    def blob_trigger(myblob) -> bytes:
    content = read_blob_content(myblob)
    # input_stream_to_text(myblob, encoding='utf-8')
    print(f"Processed blob: {repr(myblob.name)}, size: {repr(myblob.length)} bytes")
    logging.info(f"Processed blob: {repr(myblob.name)}, size: {repr(myblob.length)} bytes")
    logging.info(f"############ before SaveBlobToBlobStorage called")
    SaveBlobToBlobStorage(myblob, content, time_uuid)
    logging.info(f"############ after SaveBlobToBlobStorage called")
    # servicebus_trigger(azservicebus)
    return content # This writes to the output binding as .txt
    logging.info("############ before blob_trigger called")
    outputblob = blob_trigger(myblob=func.InputStream)
    logging.info("############ after blob_trigger called")


    I am getting the following error stack:

    System.NullReferenceException:
    at Microsoft.Azure.WebJobs.Extensions.Storage.Blobs.Config.BlobsExtensionConfigProvider.GetBlobTriggerMessage (Microsoft.Azure.WebJobs.Extensions.Storage.Blobs, Version=5.3.4.0, Culture=neutral, PublicKeyToken=92742159e12e44c8)
    at Microsoft.Azure.WebJobs.Extensions.Storage.Blobs.Config.BlobsExtensionConfigProvider+<ProcessEventsAsync>d__40.MoveNext (Microsoft.Azure.WebJobs.Extensions.Storage.Blobs, Version=5.3.4.0, Culture=neutral, PublicKeyToken=92742159e12e44c8)
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter.GetResult (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at Microsoft.Azure.WebJobs.Extensions.EventGrid.HttpRequestProcessor+<ProcessAsync>d__8.MoveNext (Microsoft.Azure.WebJobs.Extensions.Storage.Blobs, Version=5.3.4.0, Culture=neutral, PublicKeyToken=92742159e12e44c8)
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter.GetResult (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at Microsoft.Azure.WebJobs.Extensions.Storage.Blobs.Config.BlobsExtensionConfigProvider+<ConvertAsync>d__19.MoveNext (Microsoft.Azure.WebJobs.Extensions.Storage.Blobs, Version=5.3.4.0, Culture=neutral, PublicKeyToken=92742159e12e44c8)
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at Microsoft.Azure.WebJobs.Script.WebHost.Controllers.HostController+<ExtensionWebHookHandler>d__22.MoveNext (Microsoft.Azure.WebJobs.Script.WebHost, Version=4.1039.0.0, Culture=neutral, PublicKeyToken=null: /_/src/WebJobs.Script.WebHost/Controllers/HostController.cs:505)
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor+TaskOfIActionResultExecutor+<Execute>d__0.MoveNext (Microsoft.AspNetCore.Mvc.Core, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60)
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Threading.Tasks.ValueTask`1.get_Result (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker+<<InvokeActionMethodAsync>g__Logged|12_1>d.MoveNext (Microsoft.AspNetCore.Mvc.Core, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60)
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker+<<InvokeNextActionFilterAsync>g__Awaited|10_0>d.MoveNext (Microsoft.AspNetCore.Mvc.Core, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60)
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow (Microsoft.AspNetCore.Mvc.Core, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60)
    at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next (Microsoft.AspNetCore.Mvc.Core, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60)
    at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync (Microsoft.AspNetCore.Mvc.Core, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60)
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker+<<InvokeNextResourceFilter>g__Awaited|25_0>d.MoveNext (Microsoft.AspNetCore.Mvc.Core, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60)
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow (Microsoft.AspNetCore.Mvc.Core, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60)
    at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next (Microsoft.AspNetCore.Mvc.Core, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60)
    at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync (Microsoft.AspNetCore.Mvc.Core, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60)
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker+<<InvokeAsync>g__Logged|17_1>d.MoveNext (Microsoft.AspNetCore.Mvc.Core, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60)
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker+<<InvokeAsync>g__Logged|17_1>d.MoveNext (Microsoft.AspNetCore.Mvc.Core, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60)
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at Microsoft.AspNetCore.Builder.RouterMiddleware+<Invoke>d__4.MoveNext (Microsoft.AspNetCore.Routing, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60)
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at Microsoft.Azure.WebJobs.Script.WebHost.Middleware.FunctionInvocationMiddleware+<Invoke>d__2.MoveNext (Microsoft.Azure.WebJobs.Script.WebHost, Version=4.1039.0.0, Culture=neutral, PublicKeyToken=null: /_/src/WebJobs.Script.WebHost/Middleware/FunctionInvocationMiddleware.cs:41)
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at Microsoft.Azure.WebJobs.Script.WebHost.Middleware.JobHostEasyAuthMiddleware+<>c+<<-ctor>b__2_0>d.MoveNext (Microsoft.Azure.WebJobs.Script.WebHost, Version=4.1039.0.0, Culture=neutral, PublicKeyToken=null: /_/src/WebJobs.Script.WebHost/Middleware/JobHostEasyAuthMiddleware.cs:30)
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at Microsoft.Azure.WebJobs.Script.WebHost.Middleware.JobHostEasyAuthMiddleware+<Invoke>d__3.MoveNext (Microsoft.Azure.WebJobs.Script.WebHost, Version=4.1039.0.0, Culture=neutral, PublicKeyToken=null: /_/src/WebJobs.Script.WebHost/Middleware/JobHostEasyAuthMiddleware.cs:47)
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at Microsoft.Azure.WebJobs.Script.WebHost.HttpRequestQueue+<>c__DisplayClass7_0+<<InitializeRequestQueue>b__1>d.MoveNext (Microsoft.Azure.WebJobs.Script.WebHost, Version=4.1039.0.0, Culture=neutral, PublicKeyToken=null: /_/src/WebJobs.Script.WebHost/HttpRequestQueue.cs:84)
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at Microsoft.Azure.WebJobs.Script.WebHost.HttpRequestQueue+<Post>d__6.MoveNext (Microsoft.Azure.WebJobs.Script.WebHost, Version=4.1039.0.0, Culture=neutral, PublicKeyToken=null: /_/src/WebJobs.Script.WebHost/HttpRequestQueue.cs:57)


    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at Microsoft.Azure.WebJobs.Script.WebHost.Middleware.HttpThrottleMiddleware+<Invoke>d__7.MoveNext (Microsoft.Azure.WebJobs.Script.WebHost, Version=4.1039.0.0, Culture=neutral, PublicKeyToken=null: /_/src/WebJobs.Script.WebHost/Middleware/HttpThrottleMiddleware.cs:69)
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
    at Microsoft.Azure.WebJobs.Script.WebHost.Middleware.ExceptionMiddleware+

    <Invoke>d__3.MoveNext (Microsoft.Azure.WebJobs.Script.WebHost, Version=4.1039.0.0, Culture=neutral, PublicKeyToken=null: /_/src/WebJobs.Script.WebHost/Middleware/ExceptionMiddleware.cs:27)


    any help would be appreciated...

    Continue reading...
    Stack, Maio 21, 2025
    #1

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