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[PR #27896] fix: use actual node_id instead of 'unknown' in Worker exception handler #31888

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opened 2026-02-21 20:50:20 -05:00 by yindo · 0 comments
yindo commented 2026-02-21 20:50:20 -05:00
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Original Pull Request: https://github.com/langgenius/dify/pull/27896

State: open
Merged: No

Fixes #27756

When a node execution failed with an exception in the Worker thread, the error event was created with a hardcoded node_id='unknown' and node_type=NodeType.CODE. This caused a KeyError when the error handler tried to look up the node in the graph.

Changes:

  • Use actual node_id instead of 'unknown'
  • Use actual node.node_type instead of hardcoded NodeType.CODE
  • Add proper NodeRunResult with FAILED status and error details
  • Add task_done() call in exception handler to properly complete the task
  • Add required imports (WorkflowNodeExecutionStatus, NodeRunResult)

This ensures proper error handling and allows error strategies (retry, fail-branch, default-value) to be applied correctly to the failing node.

Important

  1. Make sure you have read our contribution guidelines
  2. Ensure there is an associated issue and you have been assigned to it
  3. Use the correct syntax to link this PR: Fixes #<issue number>.

Summary

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... ...

Checklist

  • This change requires a documentation update, included: Dify Document
  • I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
  • I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
  • I've updated the documentation accordingly.
  • I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods
**Original Pull Request:** https://github.com/langgenius/dify/pull/27896 **State:** open **Merged:** No --- Fixes #27756 When a node execution failed with an exception in the Worker thread, the error event was created with a hardcoded node_id='unknown' and node_type=NodeType.CODE. This caused a KeyError when the error handler tried to look up the node in the graph. Changes: - Use actual node_id instead of 'unknown' - Use actual node.node_type instead of hardcoded NodeType.CODE - Add proper NodeRunResult with FAILED status and error details - Add task_done() call in exception handler to properly complete the task - Add required imports (WorkflowNodeExecutionStatus, NodeRunResult) This ensures proper error handling and allows error strategies (retry, fail-branch, default-value) to be applied correctly to the failing node. > [!IMPORTANT] > > 1. Make sure you have read our [contribution guidelines](https://github.com/langgenius/dify/blob/main/CONTRIBUTING.md) > 1. Ensure there is an associated issue and you have been assigned to it > 1. Use the correct syntax to link this PR: `Fixes #<issue number>`. ## Summary <!-- Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change. --> ## Screenshots | Before | After | |--------|-------| | ... | ... | ## Checklist - [x] This change requires a documentation update, included: [Dify Document](https://github.com/langgenius/dify-docs) - [x] I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!) - [x] I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change. - [x] I've updated the documentation accordingly. - [x] I ran `dev/reformat`(backend) and `cd web && npx lint-staged`(frontend) to appease the lint gods
yindo added the pull-request label 2026-02-21 20:50:20 -05:00
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Reference: langgenius/dify#31888
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