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Non-Streaming Output from LLM Model in Dify Usage #7538

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opened 2026-02-21 18:21:06 -05:00 by yindo · 2 comments
yindo commented 2026-02-21 18:21:06 -05:00
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Originally created by @assassinfym on GitHub (Jan 6, 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.
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  • [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

0.14.2

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

Dear Support Team,

I am encountering an issue while using Dify, where the LLM (Language Model) does not seem to provide a streaming output. This behavior is consistent even when I use the most basic chat assistant configurations. Interestingly, testing the same model on the official website at https://cloud.dify.ai/ yields the expected streaming output functionality.

After reviewing existing issues, I have not found any settings or configurations related to enabling or disabling the stream feature within the application or documentation. Given this, it's unclear how to proceed to achieve the desired streaming output in my local or custom deployment of Dify.

Could you please advise on whether there are specific settings or configurations that need to be adjusted to enable streaming output? If this is a known limitation or if there are workarounds available, your guidance would be greatly appreciated.

Thank you for your support.

✔️ Expected Behavior

steam

❌ Actual Behavior

No response

Originally created by @assassinfym on GitHub (Jan 6, 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 0.14.2 ### Cloud or Self Hosted Self Hosted (Docker) ### Steps to reproduce Dear Support Team, I am encountering an issue while using Dify, where the LLM (Language Model) does not seem to provide a streaming output. This behavior is consistent even when I use the most basic chat assistant configurations. Interestingly, testing the same model on the official website at https://cloud.dify.ai/ yields the expected streaming output functionality. After reviewing existing issues, I have not found any settings or configurations related to enabling or disabling the stream feature within the application or documentation. Given this, it's unclear how to proceed to achieve the desired streaming output in my local or custom deployment of Dify. Could you please advise on whether there are specific settings or configurations that need to be adjusted to enable streaming output? If this is a known limitation or if there are workarounds available, your guidance would be greatly appreciated. Thank you for your support. ### ✔️ Expected Behavior steam ### ❌ Actual Behavior _No response_
yindo added the 🐞 bug label 2026-02-21 18:21:06 -05:00
yindo closed this issue 2026-02-21 18:21:07 -05:00
yindo commented 2026-02-21 18:21:07 -05:00
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@dosubot[bot] commented on GitHub (Jan 6, 2025):

There is a known issue in Dify 0.14.2 that could prevent streaming from functioning as expected in a self-hosted environment. When using a My-LLM model deployed by MS-Swift, streaming mode fails due to the response data lacking a leading space after 'data:' in the streaming response. This formatting issue causes compatibility problems with Dify's streaming implementation [1].

To enable streaming output for the LLM model in your self-hosted Dify setup, ensure that the stream parameter is set to True when invoking the model. The _invoke and _generate methods in the NVIDIALargeLanguageModel class both have a stream parameter, which is used to control whether the response should be streamed. Make sure that when you call these methods, the stream argument is explicitly set to True [2].

If you are already setting stream=True and it still doesn't work, there might be other configuration issues outside the provided code context.

To continue talking to Dosu, mention @dosu.

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

@dosubot[bot] commented on GitHub (Jan 6, 2025): <!-- Answer --> There is a known issue in Dify 0.14.2 that could prevent streaming from functioning as expected in a self-hosted environment. When using a My-LLM model deployed by MS-Swift, streaming mode fails due to the response data lacking a leading space after 'data:' in the streaming response. This formatting issue causes compatibility problems with Dify's streaming implementation <sup>[[1]](https://github.com/langgenius/dify/issues/12143)</sup>. To enable streaming output for the LLM model in your self-hosted Dify setup, ensure that the `stream` parameter is set to `True` when invoking the model. The `_invoke` and `_generate` methods in the `NVIDIALargeLanguageModel` class both have a `stream` parameter, which is used to control whether the response should be streamed. Make sure that when you call these methods, the `stream` argument is explicitly set to `True` <sup>[[2]](https://github.com/langgenius/dify/blob/main/api/core/model_runtime/model_providers/nvidia/llm/llm.py)</sup>. If you are already setting `stream=True` and it still doesn't work, there might be other configuration issues outside the provided code context. <!-- 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/3e2c07fd-0bb1-45f4-b35f-c28e5633d1af?feedback_type=great_response) | [Irrelevant Answer](https://app.dosu.dev/response-feedback/3e2c07fd-0bb1-45f4-b35f-c28e5633d1af?feedback_type=irrelevant_answer) | [Incorrect Sources](https://app.dosu.dev/response-feedback/3e2c07fd-0bb1-45f4-b35f-c28e5633d1af?feedback_type=incorrect_sources) | [Too Verbose](https://app.dosu.dev/response-feedback/3e2c07fd-0bb1-45f4-b35f-c28e5633d1af?feedback_type=too_verbose) | [Hallucination](https://app.dosu.dev/response-feedback/3e2c07fd-0bb1-45f4-b35f-c28e5633d1af?feedback_type=hallucination) | [Other](https://app.dosu.dev/response-feedback/3e2c07fd-0bb1-45f4-b35f-c28e5633d1af?feedback_type=other)</sup>
yindo commented 2026-02-21 18:21:07 -05:00
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@assassinfym commented on GitHub (Jan 6, 2025):

MS-Swift,

i use Genimi, it also not work

@assassinfym commented on GitHub (Jan 6, 2025): > MS-Swift, i use Genimi, it also not work
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Reference: langgenius/dify#7538
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