---
title: "Cloud Functions troubleshooting"
slug: "cloudfunctions-troubleshoot"
updated: 2026-09-17T09:04:10Z
published: 2026-09-17T09:18:24Z
canonical: "guide.ncloud-docs.com/cloudfunctions-troubleshoot"
stale: true
---

> ## Documentation Index
> Fetch the complete documentation index at: https://guide.ncloud-docs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Cloud Functions troubleshooting

Available in Classic and VPC

This page lists problems you might run into when using Cloud Functions. Click on the error to see more details.

## Troubleshoot creation and log issues

The following are examples of creation and log-related issues you might encounter:

[Cannot check execution history](/docs/en/cloudfunctions-troubleshoot-common#%EC%8B%A4%ED%96%89%EC%9D%B4%EB%A0%A5%ED%99%95%EC%9D%B8%EB%B6%88%EA%B0%80) I cannot check the execution history in the **Dashboard** menu and the **[Monitoring]** tab in Action.

[Cannot select subnet](/docs/en/cloudfunctions-troubleshoot-common#Subnet%EC%84%A0%ED%83%9D%EB%B6%88%EA%B0%80) I cannot select a subnet when creating an action. There are created subnets, but I do not see any subnets on the list.

## Troubleshoot call issues

The following are examples of call-related issues you might encounter:

["Request larger than allowed" error](/docs/en/cloudfunctions-troubleshoot-invocation#Requestlargerthanallowed%EC%98%A4%EB%A5%98) The size of the requested body is less than 10 MB, but an error occurs when I call the API Gateway trigger. When I call the API Gateway trigger, the following error message is displayed:

```
{
  "code": "<code>",
  "error": "Request larger than allowed: 2097152 > 1048576 bytes."
}
```

["ACTION_BODY_INVALID_TYPE" error](/docs/en/cloudfunctions-troubleshoot-invocation#ACTIONBODYINVALIDTYPE%EC%98%A4%EB%A5%98) When I request Put Action API, the "ACTION_BODY_INVALID_TYPE" error occurs. The following error message is displayed:

```
{
  "error": {
    "errorCode": "80305",
    "message": "ACTION_BODY_INVALID_TYPE",
    "details": "The requested body is in an invalid action format."
  }
}
```

["Not Found Exception" error](/docs/en/cloudfunctions-troubleshoot-invocation#NotFoundException%EC%98%A4%EB%A5%98) The "Not Found Exception" error occurs. The following error message is displayed:

```
{       
    "error": {           
        "errorCode": "300",
        "message": "Not Found Exception",           
        "details": "URL not found."       
    }
}
```

[HTTP Status code other than 200 returned](/docs/en/cloudfunctions-troubleshoot-invocation#200%EC%9D%B4%EC%95%84%EB%8B%8CHTTPStatus%EC%BD%94%EB%93%9C%EB%A6%AC%ED%84%B4) An HTTP status code other than 200 is returned.

## Troubleshoot execution issues

The following are examples of execution-related issues you might encounter:

[Cron execution error](/docs/en/cloudfunctions-troubleshoot-execution#Cron%EC%8B%A4%ED%96%89%EC%98%A4%EB%A5%98) An action works in Cloud Functions but not in Cron.

[Object Storage type trigger execution error](/docs/en/cloudfunctions-troubleshoot-execution#ObjectStorage%ED%83%80%EC%9E%85%ED%8A%B8%EB%A6%AC%EA%B1%B0%EC%8B%A4%ED%96%89%EC%98%A4%EB%A5%98) I set an upload event in an Object Storage type trigger, but the trigger does not work.

["cannot import name... " error](/docs/en/cloudfunctions-troubleshoot-execution#cannotimportname%EC%98%A4%EB%A5%98) An error in the format of "cannot import name ..." occurs when running a Python action.

[UnsupportedClassVersionError error](/docs/en/cloudfunctions-troubleshoot-execution#UnsupportedClassVersionError%EC%98%A4%EB%A5%98) When I run the Java action, the "UnsupportedClassVersionError" error occurs.

[Too many concurrent requests in flight()'response returned](/docs/en/cloudfunctions-troubleshoot-execution#Toomanyconcurrentrequestsinflight%EC%9D%91%EB%8B%B5%EB%A6%AC%ED%84%B4) As a result of action, a response like "Too many concurrent requests in flight()'" has returned.

## Troubleshoot network issues

The following are examples of network issues you might encounter:

[Time limits error](/docs/en/cloudfunctions-troubleshoot-network#Timelimits%EC%98%A4%EB%A5%98) The "Time limits" error occurs.

[VPC VM communication not available in VPC action](/docs/en/cloudfunctions-troubleshoot-network#VPC%EC%95%A1%EC%85%98%EC%97%90%EC%84%9CVPCVM%ED%86%B5%EC%8B%A0%EB%B6%88%EA%B0%80) In a VPC action, the VPC VM communication is not available.

## Learning resources

We offer various materials for you to explore. To learn more about Cloud Functions, check out these helpful links:

- FAQs: [Cloud Functions FAQs](https://www.ncloud.com/support/faq/prod?categoryCode3=SV_0008&amp;page=1)
- NAVER Cloud Platform blog: [Implement document image analysis service without a server](https://blog.naver.com/n_cloudplatform/222588383675?trackingCode=blog_bloghome_searchlist)
- NAVER Cloud Platform blog: [Automate your video service: using NAVER Cloud Platform VOD Station + Cloud Functions](https://blog.naver.com/n_cloudplatform/223003916024?trackingCode=blog_bloghome_searchlist)
- Online webinar: [Implement serverless with Cloud Functions easily](https://www.youtube.com/watch?v=6ARz-d8GVUY)
- Easy start guide: [Run actions in Cloud Functions](https://www.ncloud.com/guideCenter/guide/4)
- Easy start guide: [Provide image translation service using Serverless Framework](https://www.ncloud.com/guideCenter/guide/78)
- Easy start guide: [Real-time AiTEMS product recommendation using Cloud Functions](https://www.ncloud.com/guideCenter/guide/66)
- Easy start guide: [Call business logics using API Gateway and Cloud Functions](https://www.ncloud.com/guideCenter/guide/29)
- Easy start guide: [Get news everyday using Cloud Outbound Mailer and Cloud Functions](https://www.ncloud.com/guideCenter/guide/26)

              Note

              

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