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

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openclaw/openclaw#69614•Fetched 2026-04-22 07:50:13
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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.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

Expected vs Actual •Expected: All 17 images received •Actual: Only 10 images received (~41% loss) EvidenceGateway logs show only 10 "Image resized" records during the window. Filesystem confirms only 10 files saved. No errors logged — the dropped images don't generate any error messages at all.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

Error Message

EvidenceGateway logs show only 10 "Image resized" records during the window. Filesystem confirms only 10 files saved. No errors logged — the dropped images don't generate any error messages at all.Request EvidenceGateway logs show only 10 "Image resized" records during the window. Filesystem confirms only 10 files saved. No errors logged — the dropped images don't generate any error messages at all.Request EvidenceGateway logs show only 10 "Image resized" records during the window. Filesystem confirms only 10 files saved. No errors logged — the dropped images don't generate any error messages at all.Request

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.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

Expected vs Actual •Expected: All 17 images received •Actual: Only 10 images received (~41% loss) EvidenceGateway logs show only 10 "Image resized" records during the window. Filesystem confirms only 10 files saved. No errors logged — the dropped images don't generate any error messages at all.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

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Bug type

Behavior bug (incorrect output/state without crash)

Beta release blocker

No

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

Expected vs Actual •Expected: All 17 images received •Actual: Only 10 images received (~41% loss) EvidenceGateway logs show only 10 "Image resized" records during the window. Filesystem confirms only 10 files saved. No errors logged — the dropped images don't generate any error messages at all.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

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

Expected vs Actual •Expected: All 17 images received •Actual: Only 10 images received (~41% loss) EvidenceGateway logs show only 10 "Image resized" records during the window. Filesystem confirms only 10 files saved. No errors logged — the dropped images don't generate any error messages at all.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

Actual behavior

•Actual: Only 10 images received (~41% loss) EvidenceGateway logs show only 10 "Image resized" records during the window. Filesystem confirms only 10 files saved. No errors logged — the dropped images don't generate any error messages at all.Request

OpenClaw version

2026.03.28

Operating system

Linux5.10.134

Install method

No response

Model

qwen3.6-plus

Provider / routing chain

dingtalk-connector (stream mode)

Additional provider/model setup details

No response

Logs, screenshots, and evidence

Impact and severity

No response

Additional information

No response

extent analysis

TL;DR

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

Guidance

  • Investigate the need for back-pressure handling or a message buffer in the stream connection to prevent image loss.
  • Add per-message reception logging for dingtalk-connector to better understand which images are being dropped.
  • Consider slowing down the rate at which image messages are sent to see if it affects the number of images received.
  • Review the gateway logs and filesystem to ensure that there are no other issues contributing to the missing images.

Example

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

Notes

The issue may be related to the rapid succession of image messages, which could be causing the stream connection to drop some of the images. The lack of error messages suggests that the issue may be related to the connection or buffering rather than an error in the code.

Recommendation

Apply workaround: Implement a message acknowledgment/retry mechanism for DingTalk stream mode to ensure that all images are received and processed correctly. This may help to prevent image loss and ensure that all images are received by the gateway.

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FAQ

Expected behavior

Expected vs Actual •Expected: All 17 images received •Actual: Only 10 images received (~41% loss) EvidenceGateway logs show only 10 "Image resized" records during the window. Filesystem confirms only 10 files saved. No errors logged — the dropped images don't generate any error messages at all.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

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