openclaw - 💡(How to fix) Fix DingTalk Connector (stream mode) drops image messages in rapid succession [1 comments, 1 participants]

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openclaw/openclaw#69625Fetched 2026-04-22 07:50:00
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When sending multiple image messages rapidly via DingTalk (钉钉), the dingtalk-connector in stream mode fails to receive all image callbacks. Only a subset of the images arrive at the gateway.

Error Message

  • No errors or warnings logged — dropped images do not generate any error messages

Root Cause

When sending multiple image messages rapidly via DingTalk (钉钉), the dingtalk-connector in stream mode fails to receive all image callbacks. Only a subset of the images arrive at the gateway.

RAW_BUFFERClick to expand / collapse

Summary

When sending multiple image messages rapidly via DingTalk (钉钉), the dingtalk-connector in stream mode fails to receive all image callbacks. Only a subset of the images arrive at the gateway.

Environment

  • OpenClaw version: 2026.3.28
  • Channel: dingtalk-connector (stream mode)
  • OS: Linux 5.10.134-19.2.al8.x86_64 (x64)
  • Node: v22.22.2

Steps to Reproduce

  1. Connect to OpenClaw via DingTalk
  2. Send 17 image messages in rapid succession (within ~2 minutes)
  3. Check how many images the gateway received

Expected Behavior

All 17 image messages should be received.

Actual Behavior

Only 10 out of 17 images were received (~41% loss rate).

Evidence

  • Gateway logs show only 10 Image resized records during the 13:30-13:32 window
  • Filesystem confirms only 10 files saved
  • No errors or warnings logged — dropped images do not generate any error messages

Possible Causes

  1. DingTalk stream mode callback loss under burst traffic
  2. Missing message queue/buffer in the connector
  3. Rate limiting without retry mechanism

Request

  • Add message acknowledgment/retry mechanism for DingTalk stream mode
  • Add per-message reception logging for dingtalk-connector
  • Investigate whether the stream connection needs back-pressure handling or a message buffer

extent analysis

TL;DR

Implementing a message acknowledgment and retry mechanism for the DingTalk stream mode may help mitigate the issue of missing image callbacks.

Guidance

  • Investigate the feasibility of adding a message queue or buffer to the dingtalk-connector to handle burst traffic and prevent message loss.
  • Consider implementing back-pressure handling or a flow control mechanism to regulate the rate at which image messages are sent and processed.
  • Add per-message reception logging for the dingtalk-connector to better understand the flow of messages and identify potential drop points.
  • Review the DingTalk API documentation to see if there are any existing mechanisms for handling message acknowledgments and retries that can be leveraged.

Example

No code example is provided as the issue does not contain sufficient technical details to create a specific code snippet.

Notes

The root cause of the issue is unclear, and further investigation is needed to determine the exact reason for the missing image callbacks. The suggested guidance points are based on the possible causes mentioned in the issue and may need to be adjusted or refined as more information becomes available.

Recommendation

Apply a workaround by implementing a message acknowledgment and retry mechanism for the DingTalk stream mode, as this is likely to help mitigate the issue of missing image callbacks. This approach is recommended because it directly addresses one of the possible causes mentioned in the issue and can help improve the reliability of the dingtalk-connector.

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openclaw - 💡(How to fix) Fix DingTalk Connector (stream mode) drops image messages in rapid succession [1 comments, 1 participants]