Hey @DayoWang, great to see you around here again! Hope you're doing well amidst these tech puzzles.

Based on the information you've provided, it seems like the issue you're experiencing might be related to the WorkflowEventTriggerCallback class in the Dify codebase. This class is designed to handle various events related to workflow execution and individual workflow node execution. It's responsible for publishing different types of events to a queue system during the lifecycle of a workflow and its nodes.

One of the methods in this class, on_node_text_chunk, is supposed to handle the publishing of text chunks, which could be part of the workflow conversations. However, as shown in the provided code snippet, the on_node_text_chunk method has a pass statement, indicating that the method does not perform any operation. This lack of implementation means that any attempt to handle or save workflow conversations by invoking this method would result in no action being taken, which could lead to errors or the inability to save conversations when the workflow is released and the application context is switched.

To resolve this issue, the on_node_text_chunk method needs to be properly implemented to handle the publishing of text chunks as part of the workflow conversations. However, as I'm unable to create pull requests or issues, I would recommend reaching out to the repository maintainers or contributors to address this issue.

You can find more details about the WorkflowEventTriggerCallback class and its methods in the Dify repository.

I hope this information helps! If you have any other questions or need further clarification, feel free to ask.

Sources

• api/core/app/apps/workflow/workflow_event_trigger_callback.py
• api/core/app/apps/advanced_chat/workflow_event_trigger_callback.py