python - Python 中具有计时器触发器和 RunOnStartup 的 Azure 函数在本地失败，并出现错误 "Did not find any initialized language workers"

Question

我有一个带有计时器触发器的 Python Azure 函数。为了按需进行本地测试，我将 RunOnStartup 选项设置为 True ( Microsoft documentation here )。

我的简化 Python 代码如下所示:

import logging
import azure.functions as func
import sendgrid
from sendgrid import SendGridAPIClient
import azure.storage.blob
from azure.storage.blob import BlobServiceClient, BlobClient, ContainerClient
import wikipedia
import json, os
from datetime import datetime

//Initializations

def main(mytimer: func.TimerRequest, inputblob: func.InputStream) -> None:
    utc_timestamp = datetime.datetime.utcnow().replace(
        tzinfo=datetime.timezone.utc).isoformat()

    if mytimer.past_due:
        logging.info('The timer is past due!')

    logging.info('Python timer trigger function ran at %s', utc_timestamp)

    // Do stuff

我的 function.json(带有计时器触发器和 blob 输入绑定(bind)):

{
  "scriptFile": "__init__.py",
  "bindings": [
    {
      "name": "mytimer",
      "type": "timerTrigger",
      "direction": "in",
      "schedule": "0 30 9 * * *",
      "runOnStartup": true
    },
    {
      "name": "inputblob",
      "type": "blob",
      "path": "sharefiles/versionIds.json",
      "connection": "shareFilesConnString",
      "direction": "in"
    }
  ]
}

还有我的hosts.json:

{
  "version": "2.0",
  "extensionBundle": {
      "id": "Microsoft.Azure.Functions.ExtensionBundle",
      "version": "[1.*, 2.0.0)"
  }
}

但是，在我的计算机上本地运行该函数进行测试时，我得到以下输出。最明显的错误是:

System.Private.CoreLib: Exception while executing function: Functions.. Microsoft.Azure.WebJobs.Script: Did not find any initialized language workers.

Executing task: .venv\Scripts\activate ; func host start <

Found Python version 3.7.5 (python).

                  %%%%%%
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            @   %%%%%%    @
          @@   %%%%%%      @@
       @@@    %%%%%%%%%%%    @@@
     @@      %%%%%%%%%%        @@
       @@         %%%%       @@
         @@      %%%       @@
           @@    %%      @@
                %%
                %

Azure Functions Core Tools (2.7.1948 Commit hash: 29a0626ded3ae99c4111f66763f27bb9fb564103)    
Function Runtime Version: 2.0.12888.0
[12/10/2019 8:11:29 PM] File 'C:\Program Files\dotnet\dotnet.exe' is not found, 'dotnet' invocation will rely on the PATH environment variable.
[12/10/2019 8:11:29 PM] Building host: startup suppressed: 'False', configuration suppressed: 'False', startup operation id: 'ca4aefed-0190-45d6-9ad6-d22c0cd6abf1'
[12/10/2019 8:11:29 PM] Reading host configuration file 'C:\Users\<redacted>\Desktop\TimerTrigger\host.json'
[12/10/2019 8:11:29 PM] Host configuration file read:
[12/10/2019 8:11:29 PM] {
[12/10/2019 8:11:29 PM]   "version": "2.0",
[12/10/2019 8:11:29 PM]   "extensionBundle": {
[12/10/2019 8:11:29 PM]     "id": "Microsoft.Azure.Functions.ExtensionBundle",
[12/10/2019 8:11:29 PM]     "version": "[1.*, 2.0.0)"
[12/10/2019 8:11:29 PM]   }
[12/10/2019 8:11:29 PM] }
[12/10/2019 8:11:29 PM] Looking for extension bundle Microsoft.Azure.Functions.ExtensionBundle 
at C:\Users\<redacted>\AppData\Local\Temp\Functions\ExtensionBundles\Microsoft.Azure.Functions.ExtensionBundle
[12/10/2019 8:11:29 PM] Found a matching extension bundle at C:\Users\<redacted>\AppData\Local\Temp\Functions\ExtensionBundles\Microsoft.Azure.Functions.ExtensionBundle\1.1.1
[12/10/2019 8:11:29 PM] Fetching information on versions of extension bundle Microsoft.Azure.Functions.ExtensionBundle available on https://functionscdn.azureedge.net/public/ExtensionBundles/Microsoft.Azure.Functions.ExtensionBundle/index.json
[12/10/2019 8:11:29 PM] Skipping bundle download since it already exists at path C:\Users\<redacted>\AppData\Local\Temp\Functions\ExtensionBundles\Microsoft.Azure.Functions.ExtensionBundle\1.1.1
[12/10/2019 8:11:29 PM] Loading Extention bundle from C:\Users\<redacted>\AppData\Local\Temp\Functions\ExtensionBundles\Microsoft.Azure.Functions.ExtensionBundle\1.1.1
[12/10/2019 8:11:29 PM] Reading functions metadata
[12/10/2019 8:11:29 PM] 1 functions found
[12/10/2019 8:11:29 PM] Loading startup extension 'AzureStorage'
[12/10/2019 8:11:29 PM] Loaded extension 'AzureStorage' (3.0.10.0)
[12/10/2019 8:11:30 PM] File 'C:\Program Files\dotnet\dotnet.exe' is not found, 'dotnet' invocation will rely on the PATH environment variable.
[12/10/2019 8:11:30 PM] Initializing Warmup Extension.
[12/10/2019 8:11:30 PM] Initializing Host. OperationId: 'ca4aefed-0190-45d6-9ad6-d22c0cd6abf1'.[12/10/2019 8:11:30 PM] Host initialization: ConsecutiveErrors=0, StartupCount=1, OperationId=ca4aefed-0190-45d6-9ad6-d22c0cd6abf1
[12/10/2019 8:11:30 PM] LoggerFilterOptions
[12/10/2019 8:11:30 PM] {
[12/10/2019 8:11:30 PM]   "MinLevel": "None",
[12/10/2019 8:11:30 PM]   "Rules": [
[12/10/2019 8:11:30 PM]     {
[12/10/2019 8:11:30 PM]       "ProviderName": null,
[12/10/2019 8:11:30 PM]       "CategoryName": null,
[12/10/2019 8:11:30 PM]       "LogLevel": null,
[12/10/2019 8:11:30 PM]       "Filter": "<AddFilter>b__0"
[12/10/2019 8:11:30 PM]     },
[12/10/2019 8:11:30 PM]     {
[12/10/2019 8:11:30 PM]       "ProviderName": "Microsoft.Azure.WebJobs.Script.WebHost.Diagnostics.SystemLoggerProvider",
[12/10/2019 8:11:30 PM]       "CategoryName": null,
[12/10/2019 8:11:30 PM]       "LogLevel": "None",
[12/10/2019 8:11:30 PM]       "Filter": null
[12/10/2019 8:11:30 PM]     },
[12/10/2019 8:11:30 PM]     {
[12/10/2019 8:11:30 PM]       "ProviderName": "Microsoft.Azure.WebJobs.Script.WebHost.Diagnostics.SystemLoggerProvider",
[12/10/2019 8:11:30 PM]       "CategoryName": null,
[12/10/2019 8:11:30 PM]       "LogLevel": null,
[12/10/2019 8:11:30 PM]       "Filter": "<AddFilter>b__0"
[12/10/2019 8:11:30 PM]     }
[12/10/2019 8:11:30 PM]   ]
[12/10/2019 8:11:30 PM] }
[12/10/2019 8:11:30 PM] FunctionResultAggregatorOptions
[12/10/2019 8:11:30 PM] {
[12/10/2019 8:11:30 PM]   "BatchSize": 1000,
[12/10/2019 8:11:30 PM]   "FlushTimeout": "00:00:30",
[12/10/2019 8:11:30 PM]   "IsEnabled": true
[12/10/2019 8:11:30 PM] }
[12/10/2019 8:11:30 PM] SingletonOptions
[12/10/2019 8:11:30 PM] {
[12/10/2019 8:11:30 PM]   "LockPeriod": "00:00:15",
[12/10/2019 8:11:30 PM]   "ListenerLockPeriod": "00:00:15",
[12/10/2019 8:11:30 PM]   "LockAcquisitionTimeout": "10675199.02:48:05.4775807",
[12/10/2019 8:11:30 PM]   "LockAcquisitionPollingInterval": "00:00:05",
[12/10/2019 8:11:30 PM]   "ListenerLockRecoveryPollingInterval": "00:01:00"
[12/10/2019 8:11:30 PM] }
[12/10/2019 8:11:30 PM] QueuesOptions
[12/10/2019 8:11:30 PM] {
[12/10/2019 8:11:30 PM]   "BatchSize": 16,
[12/10/2019 8:11:30 PM]   "NewBatchThreshold": 8,
[12/10/2019 8:11:30 PM]   "MaxPollingInterval": "00:00:02",
[12/10/2019 8:11:30 PM]   "MaxDequeueCount": 5,
[12/10/2019 8:11:30 PM]   "VisibilityTimeout": "00:00:00"
[12/10/2019 8:11:30 PM] }
[12/10/2019 8:11:30 PM] BlobsOptions
[12/10/2019 8:11:30 PM] {
[12/10/2019 8:11:30 PM]   "CentralizedPoisonQueue": false
[12/10/2019 8:11:30 PM] }
[12/10/2019 8:11:30 PM] HttpOptions
[12/10/2019 8:11:30 PM] {
[12/10/2019 8:11:30 PM]   "DynamicThrottlesEnabled": false,
[12/10/2019 8:11:30 PM]   "MaxConcurrentRequests": -1,
[12/10/2019 8:11:30 PM]   "MaxOutstandingRequests": -1,
[12/10/2019 8:11:30 PM]   "RoutePrefix": "api"
[12/10/2019 8:11:30 PM] }
[12/10/2019 8:11:30 PM] Starting JobHost
[12/10/2019 8:11:30 PM] Starting Host (HostId=desktopl8i1u40-13243865, InstanceId=49bcc245-e949-45fd-b731-1e5ccd7ebbdc, Version=2.0.12888.0, ProcessId=10432, AppDomainId=1, InDebugMode=False, InDiagnosticMode=False, FunctionsExtensionVersion=~2)
[12/10/2019 8:11:30 PM] Loading functions metadata
[12/10/2019 8:11:30 PM] 1 functions loaded
[12/10/2019 8:11:30 PM] Loading proxies metadata
[12/10/2019 8:11:30 PM] Initializing Azure Function proxies
[12/10/2019 8:11:30 PM] 0 proxies loaded
[12/10/2019 8:11:30 PM] Starting worker process:python  c:/Users/<redacted>/.vscode/extensions/ms-python.python-2019.11.50794/pythonFiles/ptvsd_launcher.py --default --host 127.0.0.1 --port 9091 --wait "C:\Users\<redacted>\AppData\Roaming\npm\node_modules\azure-functions-core-tools\bin\workers\python\3.7/WINDOWS/X64/worker.py" --host 127.0.0.1 --port 55800 --workerId 0edae10c-af7f-4e37-8d13-382365306813 --requestId d0d3851a-1ee8-411d-bb74-426ab04b44b6 --grpcMaxMessageLength 134217728
[12/10/2019 8:11:30 PM] python process with Id=13188 started
[12/10/2019 8:11:30 PM] Generating 1 job function(s)
[12/10/2019 8:11:31 PM] Found the following functions:
[12/10/2019 8:11:31 PM] Host.Functions.<functionname>
[12/10/2019 8:11:31 PM]
[12/10/2019 8:11:31 PM] Initializing function HTTP routes
[12/10/2019 8:11:31 PM] No HTTP routes mapped
[12/10/2019 8:11:31 PM]
[12/10/2019 8:11:31 PM] Host initialized (546ms)
[12/10/2019 8:11:31 PM] Executing 'Functions.<functionname>' (Reason='Timer fired at 2019-12-10T15:11:31.5531175-05:00', Id=6176e5d6-c860-4bf7-80e5-712b8919310d)
[12/10/2019 8:11:31 PM] Trigger Details: UnscheduledInvocationReason: RunOnStartup
[12/10/2019 8:12:30 PM] Starting worker process failed
[12/10/2019 8:12:30 PM] The operation has timed out.
[12/10/2019 8:12:31 PM] Starting worker process:python  c:/Users/<redacted>/.vscode/extensions/ms-python.python-2019.11.50794/pythonFiles/ptvsd_launcher.py --default --host 127.0.0.1 --port 9091 --wait "C:\Users\<redacted>\AppData\Roaming\npm\node_modules\azure-functions-core-tools\bin\workers\python\3.7/WINDOWS/X64/worker.py" --host 127.0.0.1 --port 55800 --workerId d68b30e0-3146-43f7-92bf-5a8f57ebf3a1 --requestId a4e0053f-b28d-44e1-9671-ac1431349d8e --grpcMaxMessageLength 134217728
[12/10/2019 8:12:31 PM] python process with Id=1524 started
[12/10/2019 8:12:31 PM] Executed 'Functions.<functionname>' (Failed, Id=6176e5d6-c860-4bf7-80e5-712b8919310d)
[12/10/2019 8:12:31 PM] System.Private.CoreLib: Exception while executing function: Functions.<functionname>. Microsoft.Azure.WebJobs.Script: Did not find any initialized language workers.
[12/10/2019 8:12:31 PM] The next 5 occurrences of the '<functionname>' schedule (Cron: '0 30 9 * * *') will be:
[12/10/2019 8:12:31 PM] 12/11/2019 09:30:00-05:00 (12/11/2019 14:30:00Z)
[12/10/2019 8:12:31 PM] 12/12/2019 09:30:00-05:00 (12/12/2019 14:30:00Z)
[12/10/2019 8:12:31 PM] 12/13/2019 09:30:00-05:00 (12/13/2019 14:30:00Z)
[12/10/2019 8:12:31 PM] 12/14/2019 09:30:00-05:00 (12/14/2019 14:30:00Z)
[12/10/2019 8:12:31 PM] 12/15/2019 09:30:00-05:00 (12/15/2019 14:30:00Z)
[12/10/2019 8:12:31 PM]
[12/10/2019 8:12:31 PM] Host started (61122ms)
[12/10/2019 8:12:31 PM] Job host started
Hosting environment: Production
Content root path: C:\Users\<redacted>\Desktop\TimerTrigger
Now listening on: http://0.0.0.0:7071
Application started. Press Ctrl+C to shut down.
[12/10/2019 8:12:36 PM] Host lock lease acquired by instance ID '00000000000000000000000086626BD5'.
[12/10/2019 8:12:37 PM]  INFO: Starting Azure Functions Python Worker.
[12/10/2019 8:12:37 PM]  INFO: Worker ID: d68b30e0-3146-43f7-92bf-5a8f57ebf3a1, Request ID: a4e0053f-b28d-44e1-9671-ac1431349d8e, Host Address: 127.0.0.1:55800        
[12/10/2019 8:12:37 PM]  INFO: Successfully opened gRPC channel to 127.0.0.1:55800
[12/10/2019 8:12:37 PM]  INFO: Received WorkerInitRequest, request ID a4e0053f-b28d-44e1-9671-ac1431349d8e
[12/10/2019 8:12:37 PM]  INFO: Received FunctionLoadRequest, request ID: a4e0053f-b28d-44e1-9671-ac1431349d8e, function ID: 1cf61de1-d4a3-4011-8695-98d4a973f1a9       
[12/10/2019 8:12:37 PM]  INFO: Successfully processed FunctionLoadRequest, request ID: a4e0053f-b28d-44e1-9671-ac1431349d8e, function ID: 1cf61de1-d4a3-4011-8695-98d4a973f1a9

我错过了什么？

Answer 1

更新:

已重现您的错误。

首先请检查C:\Program Files\dotnet下是否有dotnet.exe

其次，请检查您的环境变量。

第三，更改settings.json。

{
    "azureFunctions.deploySubpath": ".",
    "azureFunctions.scmDoBuildDuringDeployment": true,
    "azureFunctions.pythonVenv": ".venv",
    "azureFunctions.projectLanguage": "Python",
    "azureFunctions.projectRuntime": "~2",
    "debug.internalConsoleOptions": "neverOpen",
    "python.pythonPath": ".venv\\Scripts\\python.exe"
}

上图是我的settings.json。如果我没看错的话，我使用了与您相同的设置。

请像这样更改settings.json:

{
    "azureFunctions.deploySubpath": ".",
    "azureFunctions.scmDoBuildDuringDeployment": true,
    "azureFunctions.pythonVenv": ".venv",
    "azureFunctions.projectLanguage": "Python",
    "azureFunctions.projectRuntime": "~2",
    "debug.internalConsoleOptions": "neverOpen",
    "python.pythonPath": "/path/to/your/venv/bin/python"
}

最终函数可以成功运行并触发。

原始答案:

尝试找到settings.json文件，

然后你可以像这样找到你的文件:

{
    "python.pythonPath": "xxxxxxxxx",
    ...
}

更改为

{
    "python.pythonPath": "/path/to/your/venv/bin/python",
    ...
}

我以前遇到过这个错误，但使用此设置功能可以正常工作。