streaming #13890

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opened 2026-02-21 19:14:24 -05:00 by yindo · 3 comments
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Originally created by @wangsiyu666 on GitHub (May 15, 2025).

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  • This is only for bug report, if you would like to ask a question, please head to Discussions.
  • I have searched for existing issues search for existing issues, including closed ones.
  • I confirm that I am using English to submit this report (我已阅读并同意 Language Policy).
  • [FOR CHINESE USERS] 请务必使用英文提交 Issue,否则会被关闭。谢谢!:)
  • Please do not modify this template :) and fill in all the required fields.

Dify version

1.3.1

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

How to solve the problem of Postman streaming output sending a ping empty? (The front-end will report an error due to this)

Image

✔️ Expected Behavior

How to solve the problem of Postman streaming output sending a ping empty? (The front-end will report an error due to this)

Image

Actual Behavior

How to solve the problem of Postman streaming output sending a ping empty? (The front-end will report an error due to this)

Image

Originally created by @wangsiyu666 on GitHub (May 15, 2025). ### Self Checks - [x] This is only for bug report, if you would like to ask a question, please head to [Discussions](https://github.com/langgenius/dify/discussions/categories/general). - [x] I have searched for existing issues [search for existing issues](https://github.com/langgenius/dify/issues), including closed ones. - [x] I confirm that I am using English to submit this report (我已阅读并同意 [Language Policy](https://github.com/langgenius/dify/issues/1542)). - [x] [FOR CHINESE USERS] 请务必使用英文提交 Issue,否则会被关闭。谢谢!:) - [x] Please do not modify this template :) and fill in all the required fields. ### Dify version 1.3.1 ### Cloud or Self Hosted Self Hosted (Docker) ### Steps to reproduce How to solve the problem of Postman streaming output sending a ping empty? (The front-end will report an error due to this) ![Image](https://github.com/user-attachments/assets/7a671172-5561-4b15-b6f3-744287833f32) ### ✔️ Expected Behavior How to solve the problem of Postman streaming output sending a ping empty? (The front-end will report an error due to this) ![Image](https://github.com/user-attachments/assets/3a0081e6-4257-4966-9208-8d2bd193b2a9) ### ❌ Actual Behavior How to solve the problem of Postman streaming output sending a ping empty? (The front-end will report an error due to this) ![Image](https://github.com/user-attachments/assets/745e3536-b840-42cd-a066-6516985d50ef)
yindo closed this issue 2026-02-21 19:14:24 -05:00
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@dosubot[bot] commented on GitHub (May 15, 2025):

Hello @wangsiyu666! I'm Dosu, a bot here to assist you with bugs, answer your questions, and help you contribute. I'm ready to help while you wait for a human maintainer. How can I assist you today?

The 'ping' event in Dify's streaming output is used to keep the connection alive by sending a ping event every 10 seconds [1]. If you're encountering errors in the front-end due to empty 'ping' messages, it might be related to how the front-end processes these events. Unfortunately, I couldn't find specific information on how the front-end handles errors related to empty 'ping' messages. However, ensuring that your front-end is correctly configured to handle these keep-alive messages without expecting additional data might help mitigate the issue.

To continue talking to Dosu, mention @dosu.


Help Dosu learn! Give it feedback: Great Response | Irrelevant Answer | Incorrect Sources | Too Verbose | Hallucination | Bug Report | Other

@dosubot[bot] commented on GitHub (May 15, 2025): <!-- Greeting --> Hello @wangsiyu666! I'm [Dosu](https://dosu.dev), a bot here to assist you with bugs, answer your questions, and help you contribute. I'm ready to help while you wait for a human maintainer. How can I assist you today? <!-- Answer --> The 'ping' event in Dify's streaming output is used to keep the connection alive by sending a ping event every 10 seconds <sup>[[1]](https://github.com/crazywoola/dify-docs-mintlify/blob/main/api_access/completion.en.mdx)</sup>. If you're encountering errors in the front-end due to empty 'ping' messages, it might be related to how the front-end processes these events. Unfortunately, I couldn't find specific information on how the front-end handles errors related to empty 'ping' messages. However, ensuring that your front-end is correctly configured to handle these keep-alive messages without expecting additional data might help mitigate the issue. <!-- Dosu Comment Footer --> *To continue talking to [Dosu](https://dosu.dev), mention @dosu.* --- <sup>Help Dosu learn! Give it feedback: [Great Response](https://app.dosu.dev/response-feedback/0ba17a2a-81b6-4101-bacb-acd6f5106737?feedback_type=great_response) | [Irrelevant Answer](https://app.dosu.dev/response-feedback/0ba17a2a-81b6-4101-bacb-acd6f5106737?feedback_type=irrelevant_answer) | [Incorrect Sources](https://app.dosu.dev/response-feedback/0ba17a2a-81b6-4101-bacb-acd6f5106737?feedback_type=incorrect_sources) | [Too Verbose](https://app.dosu.dev/response-feedback/0ba17a2a-81b6-4101-bacb-acd6f5106737?feedback_type=too_verbose) | [Hallucination](https://app.dosu.dev/response-feedback/0ba17a2a-81b6-4101-bacb-acd6f5106737?feedback_type=hallucination) | [Bug Report](https://app.dosu.dev/response-feedback/0ba17a2a-81b6-4101-bacb-acd6f5106737?feedback_type=bug_report) | [Other](https://app.dosu.dev/response-feedback/0ba17a2a-81b6-4101-bacb-acd6f5106737?feedback_type=other)</sup>
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@wangsiyu666 commented on GitHub (May 15, 2025):

Can you modify not to send ping?

@wangsiyu666 commented on GitHub (May 15, 2025): Can you modify not to send ping?
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@crazywoola commented on GitHub (May 15, 2025):

Can you modify not to send ping?

No, this is important to ensure the sever connection with client is alive.

@crazywoola commented on GitHub (May 15, 2025): > Can you modify not to send ping? No, this is important to ensure the sever connection with client is alive.
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Reference: langgenius/dify#13890